CNV Instruction Manual - Met

CNV Instruction Manual - Met
MET-PRO
MET-PRO
Global Pump Solutions
A Met-Pro Fluid Handling Technologies Business
Combining the Resources of Dean Pump, Fybroc & Sethco
Global Pump Solutions
6040 Guion Road • Indianapolis, IN 46254
(317) 293-2930 • FAX: (317) 297-7028
E-mail: [email protected] • Web Site: www.deanpump.com
A Met-Pro Fluid Handling Technologies Business
Combining the Resources of Dean Pump, Fybroc & Sethco
DEAN PUMP® SERIES CNV206/CNV236
Inline Centrifugal Process Pumps
READ WARNINGS
HAZARDOUS SITUATIONS MAY OCCUR UNLESS THIS EQUIPMENT IS APPLIED, INSTALLED, OPERATED, AND MAINTAINED BY THOROUGHLY QUALIFIED PERSONNEL
IN STRICT ACCORDANCE WITH THE INSTRUCTION MANUAL AND ALL APPLICABLE DRAWINGS AND CODES.
Read the instruction manual completely, before installing, filling, operating, or maintaining this equipment.
Obtain, read, and heed the MSDS (Material Safety Data Sheet) for the fluids being handled before attempting to
fill, operate or maintain this equipment.
Stop the pump. Turn off the power supply (electricity, steam, etc.) to the pump driver (motor, turbine, engine, etc.)
and lock the switching device so that it cannot be restarted. Tag the switching device so that no one will attempt to
restart the unit.
Obtain instructions from the Safety Engineer responsible for your facility before performing any work on the pumping equipment and systems.
Close the suction and discharge valves completely to isolate the pump from the system. Lock the valves in the
closed position and tag them so that no one will attempt to open them.
APPLICATION AND REAPPLICATION - At the time of installation, the equipment received should have already
been selected for the service required. You must read the paperwork for the installation and check serial number of
the pump to assure that you are installing the correct pump into the service for which it was selected.
Turn off, lock out, and tag all sub-systems and auxiliary equipment and auxiliary supply lines to isolate the pumping
unit from any and all power, energy, and/or fluids.
Many pumps look identical from the outside but can be made of different materials and/or be constructed differently
inside. Personal injury, death, equipment damage, product (pumpage) damage, and/or product loss could occur if
the incorrect pump is installed.
Do not transfer an existing pump to any other service conditions until you have thoroughly reviewed the pump
construction, materials, sizing, sealing, pressure containing capability, head/capacity capability, and
temperature capability with respect to the required service. Consult your DEAN PUMP sales engineer with all the
service requirements and a full description of the existing pump (including the serial number), seal, and sub-systems
so that we can assist you in a successful reapplication.
INSTALLATION - Always wear the appropriate protective apparel when working on or around the pumping equipment. Safety glasses with side shields, heavy work gloves (use insulated work gloves when handling hot items), steel
toed shoes, hard hat, and any other protective gear as needed for protection. One example of other gear would be
breathing apparatus when working near toxic materials.
Use lifting devices, manufactured expressly for the purpose of lifting, to move the pumping machinery. Do not
attempt to lift the assembly or its components manually. Use only devices with lifting capabilities in excess of the
weight of the unit being lifted. Inspect straps,chains, hooks, etc. for damage and lifting capability before use. Lift
only at the center of gravity.
Personal injury, death, and/or equipment damage could occur if good lifting practices are not used.
Install the equipment on a properly designed and built foundation. Assure that the driver (motor, turbine,or engine)
shaft is properly aligned to the pump shaft.
Connect the suction and discharge piping without forcing the piping into position. The pipe flanges must line up
with the pump flanges “freely”. Strain caused by “forcing” and/or misalignment may cause failure of the pumping
unit, flanges, and/or the piping resulting in fluid (pumpage) release. This could cause personal injury, death
and/or damage to this and/or other equipment.
Install a “new” bolt, of the correct size per ASME/ANSI B16.5 and the correct material per ASME/ANSI B16.5,
in every bolt hole. Tighten all bolts evenly. Use only new uncorroded fasteners.
Improper flange bolting may cause failure of the pumping unit, flanges, piping, and/or fluid (pumpage) release
which could cause personal injury, death, and/or damage to this and/or other equipment.
Connect all other (auxiliary) piping necessary for safe and successful operation of the equipment in the specific service conditions of the application. Make sure that all piping is installed into it’s correct connection. Installation of a
pipe into an incorrect location could result in an explosion and personal injury or death as well as damage to this
and/or other equipment.
Install pressure relief valves in any cavities that could be subjected to pressures in excess of the allowable working
pressure of that cavity. Explosion, personal injury, death, and/or damage to this and/or other equipment may
occur if pressure exceeds allowable.
Recheck the alignment between the driver (motor, turbine, or engine) and pump shafts. Installation of piping may have
forced the pump out of alignment. If so, correct the piping to remove the distorting load.
Check to be certain that the shaft coupling spacer is not installed, and then gently bump the motor starter to check
the rotational direction of the motor. If this is not in the direction of rotation required for the pump, make the necessary corrections.
Lock-out the power to the driver (motor, turbine, engine, etc.)
Install the shaft coupling spacer. Be sure that you install all the retaining devices and bolts and that they are tight.
Read and comply with the coupling manufacturer’s instructions. Personal injury, death, and/or equipment damage
could occur if the coupling spacer is not properly installed. Remove all debris and tools from the area near the
shafts and the shaft coupling. Do this to assure that nothing is caught and thrown by the rotating parts when the
pump is started. Bolt the coupling guard securely to the baseplate, checking to assure that it is not contacting any
parts that will rotate when the pump is started.
FILLING - Before filling the pump with liquid, check to see that all possible leak locations are sealed. See that all of
the connections into the pressure containing cavity are sealed or connected to a related piping system that also has
all possible leak paths sealed. Do not plug unused jacket cavities, as this could develop dangerous pressure buildup. Use a wrench on all bolted joints to apply torque to assure that all gaskets are sealed in a tight joint. Check to
see that all threaded pipe connections are also tight enough to seal the liquid pressure that will be applied when
the system is started.
OPERATING - Before starting the unit, see that all personnel are a safe distance away from all possible hazards,
that all sub-systems are connected and operating, that all debris has been removed, that the shaft coupling guard is
securely in place, and that the pump is full of liquid.
Do not operate this pump at shut-off (no flow) as an explosion may result. This can occur with any liquid, even
“cold water”. Personal injury, death, equipment damage, and/or loss of product (pumpage) is likely to occur. If your
system is operated where it is possible for all outlets for the discharge from the pump to be closed while the pump
is still operating, a modification of the system needs to be made to assure a continual flow of pumpage through the
pump. Note that some people have a belief that a bypass line from the discharge side of the pump to the suction
side of the pump will relieve this problem, this is “NOT TRUE”; DO NOT ATTEMPT THIS.
MAINTENANCE, DISASSEMBLY AND REPAIR - Work must be performed only by thoroughly trained and qualified personnel to assure quality repair and to reduce the possibilities of injury to personnel and/or damage to
equipment. If you do not have personnel who are capable of safe quality repair of this equipment, we advise you
to return the equipment to DEAN PUMP to be repaired.
Do not attempt to perform any work on the unit until you are confident that the pump and its contents have been
stabilized at ambient temperature, and atmospheric pressure.
Put on protective wear to protect human tissue from attack by the fluids contained in the pump and any sub-systems,
and from any vapors or fumes that could possibly be released from these fluids. This could mean breathing apparatus,
face shields, heavy long sleeve rubber gloves, rubber apron, hood, and possibly more, dependent of course on the
properties of the fluids involved and the installed drain and vent piping arrangement. Personal injury and/or death
can occur if adequate precautions are not taken with regard to the fluid, the installation, and the possibilities of the
release of fluid, vapors, and/or fumes.
Remove the coupling guard. Remove the coupling spacer.
Drain all the fluids from the auxiliary sub-systems (lubrication, cooling, heating, seal barrier, etc.) that are connected to the pump. Drain each fluid into a separate container. Use caution required for each fluid after reading the
MSDS (Material Safety Data Sheet) for each.
Flush each sub-system with a compatible, non-toxic, non-hazardous, stable liquid. Drain into individual containers
for each fluid. Disconnect and remove all auxiliary piping.
Carefully bleed off any pressure remaining in the pump. Pressure remaining in the pump will be dependent upon
the pressure in the system when the pump was stopped; the quality, type, and condition of the isolation valves; the
thermal expansion valves of the fluid and the pump material; and the change in the vapor pressure of the fluid
between the temperature at the time the isolation valves were closed and the ambient temperature. Bleeding must
be through a valved drain line piped to a closed container mounted lower than the pump. The container must be
arranged with a relief passage to some point where pressure and fumes will not be harmful to personnel. The
container must also have a level device so that determination can be made that sufficient fluid has been drained to
empty the pump cavity and the volume of fluid that was contained in the run of suction and discharge pipe
between the isolation valves and the pump. After the initial rush of fluid from the pump relieves the pressure, the
drain valve can be opened further to speed the draining operation. When fluid quits running into the drain tank,
gauge the volume to see if it is sufficient to have fully drained the contents of the pump and the suction and discharge pipes between the isolation valves.
If the system was constructed without any drain connections, it will be necessary to consult the designers of the system
for safe draining procedures.
Now drain any small piping, that contains the fluid pumped, from all low points, into the same container used to
drain the pump. Do not drain any other fluids (different than the pumpage) into this container as they may not be
compatible. Personal injury, death, and/or equipment damage could occur.
Even though it might appear that, the cavity being drained has completely drained, be extremely careful about
opening the system and/or opening the pump. If something solid in the pumpage moves to the vicinity of the drain
connection, it could seal-off the drain and maintain pressure in the cavity thought to have been drained. It is also
possible that the isolation valves are not sealing and therefore allowing liquid to flow from the system into the pump.
Personal injury, death, and/or equipment damage may occur if intense caution is not exercised.
Because of the above possibility, when you loosen the gasketed joint at the back of the casing (5), loosen the bolts or
nuts only one full turn, and then use jack screws to break the gasket seal. If fluid and/or pressure remains in the pump,
it will spray out now. Use extreme caution, wearing protective gear, to avoid injury. Do not proceed with disassembly until leakage ceases completely. If leakage does not cease, the isolation valves may not be sealing. Note that if
the pump was purchased with out a drain, the pump will contain fluid which will flow out at the time the bolts are
loosened and the gasket seal is broken.
When you open the pump, the fluid will be exposed to the atmosphere and personnel in the area. For the safety of
all involved, the risk of exposure can be reduced by flushing the cavity that was just drained, with a compatible
non-toxic, non-hazardous, stable liquid, before disassembling the pump.
Remove the casing bolts or nuts and using mechanical lifting apparatus to support the weight, pull the rotating unit
from the casing.
Flush the wetted parts now exposed with compatible, non-toxic, non-hazardous, stable liquid.
Remove the gasket from the face of the casing (5) or the bearing housing (26) dependent on which one the gasket
may have adhered to. The type of gasket and material of construction will vary with service requirements. Attack by
prying and then, if necessary, layering off the old gasket with a sharp scraper, attempting to remove it in the largest
possible pieces. Wear heavy leather, long sleeve work gloves when using the scraper. Wet the gasket before and
during the scraping operation to reduce the possibility of fibers becoming airborne. Wear a respirator during this
operation and until all debris has been disposed of in a plastic bag. Remove all of the gasket material down to clean
metal surfaces on both parts that contacted the gasket. Place all of the gasket residue in a plastic bag, seal the bag
and dispose of it in compliance with all government requirements.
The rotating assembly of the pump can now be moved to a more convenient location for further disassembly. Use
only high quality tools. Flush parts as disassembled to removed hazardous residue from the pumpage and/or
sub-system fluids.
Wear protective equipment as advised at the beginning of these warnings.
Use mechanical lifting equipment to lift assemblies and components.
Do not apply heat to parts to assist in disassembly. Explosion could occur causing personal injury, death, and/or
damage to equipment.
Do not attempt to drill, saw, or otherwise cut parts to remove them. Explosion and/or fuming could occur causing
personal injury, death, and/or equipment damage.
Do not hammer on any parts. Personal injury and/or damage to equipment may occur.
When it is necessary to open the pump and/or the pumping system, the fluid will be exposed to the atmosphere
and personnel in the area. For the safety of all involved, the risk of exposure of personnel to the hazards of the
pumpage can be reduced by flushing the entire system with a compatible non-toxic, non-hazardous,stable liquid
before opening the pump or the system. In all cases, where the system is flushed or not, use the utmost care around
the pumpage and the pumping system.
Do not attempt to manufacture parts or modify Dean Pump parts in any manner. Death, personal injury, and/or
damage to equipment may occur.
Always wear the appropriate protective apparel when working on or around the pumping equipment. Safety
glasses with side shields, heavy work gloves (use insulated work gloves when handling hot items), steel-toed shoes,
hard hat, and any other protective gear as needed for protection. One example of other gear would be breathing
apparatus when working near toxic materials.
Replace all gaskets, seals, bearings, and lubricants. Replace all parts that have worn, corroded, eroded, or otherwise deteriorated.
One example of the above would be overboring the seal chamber, which removes metal that is required to contain fluids. Removal of this metal reduces the pressure containing capability of the part, and may create a leak path
through the part.
DO NOT INSTALL, OPERATE, OR SERVICE THIS PUMP
Use only Dean Pump Division of Met-Pro Corporation parts.
Use only top quality tools.
BEFORE READING THE ENTIRE MANUAL
©COPYRIGHT 2012 MET-PRO CORPORATION, DEAN PUMP
DEAN PUMP ® IS A REGISTERED TRADEMARK OF MET-PRO CORPORATION.
09-5947 512
Instruction Manual MC 1.2.35
TABLE OF CONTENTS
CUSTOMER PLANT MAINTENANCE RECORD
Mechanical Design Specifications
1
DEAN PUMP SERIAL No.
Product Inspection and Test
2
PLANT PROPERTY No.
Product Warranty
2
Warning
2
Receiving Pump
2
Storage
2
Installation
3
SERVICE
LOCATION
Capacity
; T.D.H
; Imp. Dia.
SPARE PARTS IN PLANT STOCK ROOM:
Application and Reapplication
3
Pump Mounting
3
Suction and Discharge Piping
4
Motor Bearing Lubrication
Starting the Pump
4
4-5
Filling
4
Operating
5
Pump Start up Check List
5
Spare Parts
5
Pump Section View, CNV206
6
Parts List, CNV206
6
Pump Section View, CNV236
7
Parts List, CNV236
7
Disassembly and Assembly Procedures
8-10
Disassembly
9
Reassembly
9-10
Typical Mechanical Seals
INTERCHANGEABLE WITH DEAN SERIAL NUMBERS
11-12
13
; Temp.
; RPM
TYPICAL MECHANICAL SEALS
STANDARD, INLINE, SINGLE STAGE, OPEN
IMPELLER, CENTRIFUGAL PROCESS PUMPS
TYPES CNV206, CNV236
INLINE, SINGLE STAGE, OPEN IMPELLER, CENTRIFUGAL PROCESS PUMPS
TYPES CNV206, CNV236
MECHANICAL DESIGN SPECIFICATIONS
CNV206 CNV236
Horsepower Rating - max. rated
Driver HP not to exceed @ 1750 rpm
@ 3500 rpm
Max. Hydrostatic Test Pressure
Ductile Iron (CL 22), and 316 S/S (CL 50)
STYLE “B”
5 HP
10 HP
25 HP
50 HP
WORKING PRESSURE - - KPa
STYLE “A”
PUMPING TEMPERATURE - - DEGREES C.
WORKING PRESSURE - - P. S. I. G.
Direction of Rotation from Motor End
CW
Bearings in Motor
Ball Type
Bearing Lubrication
Grease
Casing Thickness, Minimum
5/16"
Flanges - A.N.S.I. Class:
Ductile Iron (CL 22), 316 S/S (CL 50)
150
Facing
FF
Finish
125 Ra
Impeller Balance
Single Plane Dynamic Balance
Allowable Pump Suction Pressure
100 psig
(2 year minimum thrust bearing life)
ALLOWABLE WORKING PRESSURE
VS PUMPING TEMPERATURE
430 psig 430 psig
PUMPING TEMPERATURE - - DEGREES F.
All pumps contain a seal face flushing connection in the stuffing box and internal
seal circulating piping as standard.
STANDARD MATERIALS OF CONSTRUCTION
PART
NO.
PART
PART NAME
CLASS 22
CLASS 50
NO.
CLASS 50
Cast Iron (1)
316 S/S (11)
18
Splash Collar
Rubber (7)
4
Impeller Key
Steel (4)
Steel (4)
22
Casing Back Cover
Cast Iron (1)
316 S/S (11)
5
Casing
Ductile Iron (5)
316 S/S (11)
37
Clearance Shim
Steel
Steel
5A
Casing Drain Plug
Steel (4)
316 S/S (2)
56
Casing Foot - Optional
Cast Ironl (1)
Cast Iron (1)
5D
Casing Capscrew
Steel (12)
Steel (12)
77
Casing Gasket
Fiber (10)
Fiber (10)
7
Adapter Cradle
Cast Iron (1)
Cast Iron (1)
77A
Gasket - Impeller/Sleeve
Fiber (10)
Fiber (10)
10
Shaft Sleeve
316 S/S (2)
316 S/S (2)
77B
Gasket - Impeller/Washer
Fiber (10)
Fiber (10)
Rubber (7)
10K
Shaft Sleeve Key
Steel (4)
Steel (4)
77C
Gasket - Impeller/Bolt
Teflon (9)
Teflon (9)
12
Impeller Bolt
Steel (12)
316 S/S (2)
95A
Mechanical Seal Stationary
Optional
Optional
12A
Impeller Washer
Steel (4)
316 S/S (2)
95B
Mechical Seal Rotary
Optional
Optional
(1) Cast Iron
(2) AISI 316 S/S
(4) AISI 1020 Steel
(5) Ductile Iron ASTM A395
(7) Buna “N” Rubber
(9) Glass Filled Teflon™ of E. I. DuPont Co.
(10) Aramid Fiber Sheet
(11) 316 S/S - ASTM A744, Grade CF-8M
(12) ASTM A449
STYLE “B”
Specifications are subject to change without notice
12
CLASS 22
Impeller
MATERIAL SPECIFICATION:
STYLE “A”
PART NAME
3
1
TYPICAL MECHANICAL SEALS
PRODUCT INSPECTION AND TEST
signed certificate of inspection prior to shipment. Each pump
when shipped is ready to perform the service for which it was
designed with minimum maintenance and expense if properly
installed and operated in accordance with the instructions
furnished.
The Products of Dean Pump Division are subject to thorough
and rigorous quality control and inspection procedures
throughout the whole of the manufacturing process to assure
proper operation in full conformity with established performance standards. On completion of inspection, each unit is
oiled, sealed against the entrance of dirt, and tagged with a
DEAN PRODUCT WARRANTY
We warrant to the purchaser from us of Dean Pump products
and parts of our own manufacture (Dean Products) that the
Dean Products are free under rated use and service from
defects in design, material and workmanship for a period of
one (1) year from the date of installation, but not to exceed
eighteen (18) months from the date of shipment by us. This
warranty does not cover (I) any loss or damage resulting
from wear, corrosion, abrasion or deterioration due to normal
use in rated service; (II) replacement of service items such
as bearings and mechanical seals; (III) products or parts
manufactured by others but furnished by us which, if defective, shall be repaired or replaced only to the extent of the
original manufacturer’s warranty; (IV) any loss or damage to,
or defects in, any Dean Products resulting from the misuse
or improper storage, installation, or operation thereof; or (V)
any loss or damages to, or defects in, any Dean Products
resulting from any alteration or modification thereof not
expressly authorized and approved by us in writing. We
shall not be liable, directly or indirectly, under any circumstances for consequential or incidental damages, including,
but not limited, to: (I) any loss of business or profits; and (II)
labor, material or other charges, claims, losses or damages
incurred or suffered from, in connection with or in consequence of the working upon, alteration, or repair of any
defective Dean Products by persons or firms other than us.
Our liability for breach of warranty hereunder is limited solely
to the repair in our factory or the replacement F.O.B. our factory, as the case may be, of any Dean Products which shall
have been determined by us, after notice to us and inspection by us within the warranty period, to be so defective
when shipped by us. THIS WARRANTY AND THE LIABILITY SET FORTH HEREIN ARE EXCLUSIVE AND IN LIEU
OF ALL OTHER LIABILITIES AND WARRANTIES,
EXPRESSED OR IMPLIED, INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT NESS FOR
PARTICULAR PURPOSE.
STYLE “A”
WARNING
HAZARDOUS SITUATIONS MAY OCCUR UNLESS THIS EQUIPMENT IS APPLIED, INSTALLED,
OPERATED, AND MAINTAINED BY THOROUGHLY QUALIFIED PERSONNEL IN STRICT ACCORDANCE WITH THE INSTRUCTION MANUAL AND ALL APPLICABLE DRAWINGS AND CODES.
Read the instruction manual completely before installing,
filling, operating, or maintaining this equipment.
1) Seal the suction opening of the pump with a blind flange,
gasket, and bolts.
Obtain, read and heed the MSDS (Material Safety Data
Sheet) for the fluids being handled before attempting to fill,
operate or maintain this equipment. Obtain instructions from
the Safety Engineer responsible for your facility before performing any work on the pumping equipment and systems.
2) Position the pump on its side so that the motor shaft is
horizontal, the suction flange is down, and the discharge
flange is up.
STYLE “B”
3) Fill through the discharge opening of the pump a corrosion inhibiting liquid that is also compatible with the liquid
that will later be pumped. Evaluation of compatibility
must include consideration of the temperature at which
the system will later operate. Be sure to also vent air
from any auxillary piping connection to the pump and fill
it with the same inhibitor.
Proper storage while not in use and proper installation and
startup are essential for successful pump operation. Misuse
or improper storage, installation or operation of pumps may
result in serious loss or damage. Dean Pump Division is not
responsible for any loss or damage resulting from causes
beyond its control, and is not liable for charges for work performed or materials furnished to repair such loss or damage.
4) When the pump is completely filled, seal the discharge
opening with a blind flange, gasket, and bolts.
All installation, operation, and maintenance must be
done by thoroughly qualified personnel in strict accordance with this manual and must comply with all local,
state and Federal codes. Only Dean authorized service
parts must be used in the repair of these pumps.
5) Apply a heavy protective coating to any exposed metal
surfaces. A rust preventive must be used to protect all
steel and iron parts.
6) Rotate the motor shaft “by hand” each month. Wear heavy
gloves when rotating the shaft, to protect your hands. It will
most likely be necessary to remove the motor fan cover to
gain access to the motor fan to rotate the shaft.
RECEIVING PUMP
When the pump is received from the transportation company it should be promptly inspected for damage and such damage noted on the bill of lading before
it is signed. Claims for shipping damage must be filed
against the carrier.
When you are ready to place the pump in service;
1) Drain the storage liquid from the pump and any auxillary piping. Draining can be through the casing drain
connection, the auxillary piping, the suction flanged
connection, and the discharge flanged connection.
2) Remove and discard the blind suction flange, gasket,
and bolts. Remove and discard the blind discharge
flange, gasket, and bolts.
Care must be exercised in unloading and handling the pump.
STORAGE
Pumps must be properly covered and protected against
moisture, dirt, and physical damage during storage prior to
installation and operation.
STYLE “A”
STYLE “B”
3) Flush all remains of the storage liquid from the pump
and the auxillary piping. Use a flush liquid that is
If prolonged storage is anticipated, do the following:
2
11
lapped face of the stationary is toward the open side of the
casing back cover (22).
t) Recheck the clearance between the impeller (3) and the casing back cover (22) using a feeler gauge. The clearance at the
nearest blade of the impeller (3) must be between 0.008" and
0.012". If not, change the clearance shims to obtain this value.
To position the Teflon or grafoil mounted stationary, lubricate
the bore of the casing back cover (22). Carefully slide the
Teflon or grafoil mounting ring into position in the casing back
cover (22) lubricate the outer diameters of the stationary and
then slide it into place. The slot (or pin) in the stationary must
index with the drive pin (or slot) in the casing back cover (22).
u) Refer to the mechanical seal drawing supplied with this pump
to find the mounting location and arrangement for the seal that is
being installed. Lubricate the outer diameter of the shaft sleeve
(10). Orient the mechanical seal rotary (95B) with respect to the
shaft sleeve (10) as shown on the seal drawing. Slide the rotary
(95B) onto the shaft sleeve (10) being careful to not scratch the
sleeve and to not damage the elastomer/seal that seals the
rotary (95B) to the sleeve (10). Position the rotary (95B) with
respect to the impeller (3) end of the shaft sleeve (10) at the
dimension shown on the mechanical seal drawing. If the rotary
(95B) being installed has radially positioned setscrews, securely
set these using a tightening pattern of gradually tightening alternate screws. Recheck the rotary (95B) location with respect to
the end of the shaft sleeve.
e) Carefully guide the casing back cover (22) over the center of the motor shaft and pilot it into the adapter cradle (7).
Retain these parts together by installing the two casing
back cover screws (22A) and tightening them.
f) Slide the shaft sleeve (10) into position on the motor shaft.
g) Place the impeller/sleeve gasket (77A) carefully over the
shaft and into position against the face of the shaft sleeve (10).
h) Carefully slide the impeller (3) onto the shaft and against
the impeller/sleeve gasket (77A). Place the impeller washer
(12A) onto the impeller bolt (12) and then screw it into the
end of the motor shaft. Tighten the impeller bolt (12).
v) Carefully slide the shaft sleeve (10) onto the motor shaft.
As the sleeve (10) starts to protrude through the casing
back cover, center the splash collar (18) with the sleeve
(10) and force it onto the sleeve (10). Continue to slide the
sleeve (10) onto the shaft until the mechanical seal rotary
(95B) contacts the mechanical seal stationary (95A).
i) Carefully measure the distance between the impeller (3)
and the face of the casing back cover (22), using a feeler
gauge. Subtract 0.010" from this measurement to obtain
the thickness of the required clearance shims (37).
j) Remove the impeller bolt (12), impeller washer (12A),
impeller (3), impeller/sleeve gasket (77A), shaft sleeve
(10), casing back cover screws (22A), and carefully remove
the casing back cover (22).
k) If the pump is a CNV236 go to step p).
w) Rotate the shaft sleeve (10) on the motor shaft until the keyways in both align with each other. Slide the shaft sleeve key
(10K) into the keyway between the shaft sleeve (10) and the
motor shaft. Slide the impeller/sleeve gasket (77A) over the
motor shaft and against the face of the shaft sleeve (10).
l) Place a new set of clearance shims (37), of total thickness equal to the value determined in i) above, over the
pilot fit of the casing back cover (22). See clearance shim
(37) location on CNV206 Sectional Assembly 01962A.
x) Place the impeller key (4) into the keyway of the motor
shaft. Align the keyway of the impeller (3) with the impeller
key (4), and slide the impeller (3) over the motor shaft and
against the impeller/sleeve gasket (77A).
m) Place the splash collar (18) over the motor shaft and
close to the face of the motor.
y) Place the impeller bolt gasket (77C), the impeller washer
(12A), and the impeller/washer gasket (77B), on to the
impeller bolt (12). Thread the impeller bolt (12) assembly
into the end of the motor shaft and torque the bolt (12) to
the following value.
n) Carefully slide the casing back cover (22) over the center of
the motor shaft and pilot it into the adapter cradle (7), capturing
the clearance shims (37) between the adapter cradle (7) and
the casing back cover (22). Install the two casing back cover
screws and tighten them to 10 Ft. Lb. of torque.
capability of the system to retain it, therefore causing an
explosion that could prove fatal.
compatable with the liquid to be pumped. Evaluation of
compatability must include consideration of the temperature at which the system will later operate.
5) Replace all pipe plugs and tighten them. Tighten any
and all auxillary piping connections that may have been
loosened.
4) Discard the storage liquid and the flush liquid. Be sure to
comply with governmental regulations in any disposal.
6) Remove the “storage” protective coatings from the external surfaces of the pump.
WARNING:
Be sure that there is nothing remaining in the pump or piping that could react with the liquid that will be pumped or
that would have an excessive vapor pressure at the system
operating temperature. For example, solvent residue left in
the pump, when exposed to the operating temperature of
the system, could create a vapor pressure in excess of the
Pumps must also be protected from moisture, dirt, and physical damage, during and after installation while the system is
being completed. Pumps “stored” as installed in the piping
system must be completely checked for proper installation
prior to start-up.
INSTALLATION
Always wear the appropriate protective apparel when working
on or around the pumping equipment. Safety glasses with side
shields, heavy work gloves (use insulated work gloves when
handling hot items), steel-toed shoes, hard hat, and any other
protective gear as needed for protection. One example of other
gear would be breathing apparatus when working near toxic
materials. Use lifting devices, manufactured expressly for the
purpose of lifting, to move the pumping machinery. Do not
attempt to lift the assembly or its components manually. Use
only devices with lifting capabilities in excess of the weight of the
unit being lifted. Inspect straps, chains, hooks, etc. for damage
and lifting capability before use. Lift only at the center of gravity.
inside. Personal injury, death, equipment damage, product
(pumpage) damage, and/or product loss could occur if the
incorrect pump is installed.
Do not transfer an existing pump to any other service conditions
until you have thoroughly reviewed the pump construction, materials, sizing, sealing, pressure containing capability, head/capacity capability, and temperature capability with respect to the
required service. Consult your Dean Pump sales engineer with
all the service requirements and a full description of the existing
pump (including the serial number), seal, and sub-systems so
that we can assist you in a successful reapplication.
PUMP MOUNTING
Personal injury, death, and/or equipment damage could occur if
good lifting practices are not used.
It is recommended that CNV206 Series and CNV236 Series
pumps be mounted with the motor vertically upright. Other
positions are possible if adequate support is provided.
APPLICATION AND REAPPLICATION
At the time of installation, the equipment received should
have already been selected for the service required. You
must read the paperwork for the installation and check the
serial number of the pump to assure that you are installing
the correct pump into the service for which it was selected.
A pump support base for vertically upright mounting is
required in accordance with this tabulation:
Pump Size
1 x 1-1/2 x 6 CNV206 Series
1-1/2 x 3 x 6 CNV206 Series
All CNV236 Series
Many pumps look identical from the outside but can be
made of different materials and/or be constructed differently
3/8" bolt - 20 Ft. Lb.
1/2" bolt - 45 Ft.Lb.
o) Go to step t).
z) Rotate the motor shaft by turning the impeller (3) by
hand (wear heavy gloves) to be certain that there is no
internal interference.
p) Loosen the adapter cradle capscrews (7G) two or three
full turns. Insert four sets of clearance shims (37) between
the adapter cradle (7) and the motor. One set to be inserted at each of the adapter cradle capscrews (7G). See
clearance shim (37) location on CNV236 Sectional Assembly 01956A. Each set of clearance shims (37) must be of
total thickness equal to the value determined in i) above.
aa) The rotating assembly is now ready to be returned to
the installation site for final assembly.
ab) Place a new casing gasket (77) into the recess in the
casing (5). Use a mechanical lifting apparatus to lower the
rotating assembly into the casing (5). Install the casing capscrews (50) and tighten them to the following values.
q) Tighten the adapter cradle capscrews (7G) being careful
to maintain the clearance shims (37) in their proper locations and assuring that the pilot fits of the adapter cradle (7)
and the motor are aligned. Torque the adapter cradle capscrews to the following value.
1/2" capscrews - 50 Ft. Lb.
5/8" capscrews - 75 Ft.Lb.
ac) Remove the motor fan cover and rotate the motor shaft
by turning the motor fan by hand (wear heavy gloves) to be
certain that there is no internal interference. Replace the
motor fan cover and fasten it securely in place.
3/8" capscrews - torque to 20 Ft. Lb.
1/2" capscrews - torque to 45 Ft. Lb.
5/8" capscrews - torque to 70 Ft. Lb.
ad) Reinstall all auxillary piping, systems and equipment.
r) Place the splash collar (18) over the motor shaft and
close to the face of the motor.
ae) Check to see that all openings have been sealed
before filling the pump with liquid.
s) Carefully slide the casing back cover (22) over the center
of the motor shaft and pilot it into the adapter cradle (7).
Install the two casing back cover screws (22A) and tighten
them to 20 Ft. Lb. of torque.
af) Reconnect the electrical wiring and conduit.
Typical Pump Piping
ag) Follow the instructions under “STARTING THE PUMP”
and “PUMP START UP CHECKLIST”.
10
3
Use Base Above HP
Base not required
Base not required
15
job. In addition, special filtering and mechanical seal flushing guards
may be required. Consult your Dean representative. Suction line
screens or strainers may usually be removed when, after several
days of use, no dirt has been collected and the system is clean.
When a pump support base is not used, adequate pipe supports must be provided for the piping at locations close on
either side of the pump.
The foundation for the pump support base need not be elaborate. Four hold down bolt holes are provided in each base and
the foundation should include four studs to match these holes.
The support base should be seated in a thin layer of grout to
assure even support.
Remember that screens and filters in the suction line are restricting devices which reduce the net positive suction head (NPSH)
available to the pump and should be considered at the time the
system is designed.
SUCTION AND DISCHARGE PIPING
Install “new” gaskets, of the correct material for the service, and
the correct size per ASME B16.20 or ASME B16.21 at the suction
and the discharge flanges of the pump. Use only new gaskets.
Connect the suction and discharge piping without forcing the piping into position. The pipe flanges must line up with the pump
flanges “freely”.
Suction and discharge nozzle sizes of Dean pumps are selected for proper performance of the pumping unit and are not
intended to determine the suction and discharge pipe sizes.
Pipe sizes must be determined by the user based on the system requirements.
WARNING:
Strain caused by “forcing”, improper flange bolting, and/or misalignment may cause failure of the pumping unit, flanges, piping
and/or fluid (pumpage) release which could cause personal injury,
death, and/or damage to this and/or other equipment.
Suction piping should have a minimum friction loss and thus
should be as short and straight as possible with a pipe
diameter as large as economically feasible for the flow rate
handled. Suction piping should never be smaller in diameter
than the suction nozzle size. When the suction piping is larger
than the suction nozzle size an eccentric reducer is required at
the suction flange and must be installed with the taper located
on the underside to eliminate air or vapor pockets. The section of piping attached to the suction flange of the pump
should be straight for a length of eight pipe diameters or more.
Install a “new” bolt, of the correct size per ASME/ANSI B16.5 and
the correct material per ASME/ANSI B16.5, in every bolt hole.
Tighten all bolts evenly. Use only new uncorroded fasteners.
Connect all other (auxiliary) piping necessary for safe and successful operation of the equipment in the specific service conditions of the application.
WARNING:
Make sure that all piping is installed into its correct connection.
Installation of a pipe into an incorrect location could result in an
explosion and personal injury or death as well as damage to this
and/or other equipment.
Discharge piping may be the same size as, larger, or smaller
than the discharge nozzle as the system flow may demand.
In new installations or rebuilt systems, dirt, pipe scale, welding
slag, and general construction debris may get into the piping. It is
important to prevent this material from entering the pump and
damaging pump parts, or mechanical seal faces. Mechanical seal
parts are especially subject to damage even by very small particles. To prevent damage, a strainer or filter installed in the suction line is recommended. Commercially available strainers or filters as recommended by their manufacturers can do an excellent
Install pressure relief valves in any cavities that could be subjected
to pressures in excess of the allowable working pressure. Explosion, personal injury, death, and/or damage to this and/or other
equipment may occur if pressure exceeds allowable.
MOTOR BEARING LUBRICATION
Pump motor bearings are properly lubricated for nominal service conditions when the unit is shipped from the factory,
dependent upon motor style, motor size, and motor manufacturer, the bearings may be “sealed for life” or “regreasable”.
remove the grease fitting and replace the pipe plugs.
The proper grease lubricant depends on the ambient temperature, the pumping temperature, and the atmospheric contamination at each pump installation. Specific lubricants, lubrication
schedule, and lubrication instructions must be obtained by the
customer from his local lubrication specialist.
If the motor is of the “regreasable” type, the grease inlet and
outlet connections will be closed with pipe plugs. When you
need to regrease the motor bearings, remove the two pipe
plugs for each bearing and insert a grease fitting in the inlet
hole. Use a low pressure grease gun to inject the proper grade
of new grease. The grease cavity should be filled no more
than three fourths (3/4) full. Overlubrication may cause early
bearing failure. Run the motor until it has warmed up and then
In general, for reasonable ambient and contamination free
atmosphere, a high quality lithium #2 grease will usually give
satisfactory performance at the pumping temperature of these
pumps.
STARTING THE PUMP
It is important that a pump should never be subjected to thermal or pressure shock. The liquid should therefore be allowed
to flow into the casing slowly. A centrifugal pump should
never be started until all the parts are up to the temperature
of the liquid to be pumped.
are sealed or connected to a related piping system that also
has all possible leak paths sealed. Use a wrench on all bolted
joints to apply torque to assure that all gaskets are sealed in a
tight joint. Check to see that all threaded pipe connections are
also tight enough to seal the liquid pressure that will be
applied when the system is started.
FILLING
When the source of liquid supplied to the pump is below
atmospheric pressure or located below the pump, the pump
must be primed prior to start up. The priming may be accomplished in any of several ways, three of which are listed.
WARNING:
Before filling the pump with liquid, check to see that all possible leak locations are sealed. See that the point where the
pump shaft enters the pressure containing cavity is sealed.
This sealing is accomplished with a mechanical face seal. See
that all of the connections into the pressure containing cavity
1) An exhauster may be connected to the discharge piping
between the pump and the discharge shut-off valve. With the
4
(22). Use a drive pin punch, with a 3/64" punch end, and
drive from the motor side of the casing back cover (22). Be
carefull to not damage the casing back cover (22).
then, if necessary, layering off the old gasket with a sharp
scraper, attempting to remove it in the largest possible pieces.
Wear heavy leather, long sleeve work gloves when using the
scraper. Wet the gasket before and during the scraping operation to reduce the possibility of fibers becoming airborne. Wear
a respirator during this operation and until all debris has been
disposed of in a plastic bag. Remove all of the gasket material
down to clean metal surfaces on both parts that contacted the
gasket. Place all of the gasket residue in a plastic bag, seal the
bag and dispose.
h) Remove the mechanical seal rotary (95B) from the shaft
sleeve (10). Refer to the mechanical seal drawing that was
furnished with the pump. Some types of mechanical seals are
retained with radial and/or axial screws.
i) Remove the four adapter cradle capscrews (7) and
remove the adapter cradle (7) from the motor.
j) If the pump is a CNV236, remove the four clearance
shim (37) stacks from the face of the adapter cradle (7)
and/or the face of the motor.
l) The casing backcover-impeller-motor assembly of the pump can
now be moved to a more convenient location for further disassembly. Use mechanical lifting equipment to move assemblies
and components.
k) Clean and inspect all parts.
REASSEMBLY PROCEDURE
WARNING:
Use only high quality tools.
DISASSEMBLY PROCEDURE
To further dismantle the pump, perform the following steps in
the sequence shown:
Wear protective equipment as advised at the beginning of this
section.
WARNING:
Use only high quality tools.
Use mechanical lifting equipment to lift assemblies and
components.
Flush parts as disassembled to remove hazardous
residue from the pumpage and/or sub-system fluids.
Do not hammer on any parts. Personal injury and/or damage to
equipment may occur.
Wear protective equipment as advised at the beginning
of this section.
Do not attempt to manufacture parts or modify Dean Pump
parts in any manner. Death, personal injury, and/or damage to
equipment may occur. Replace all gaskets, seals, bearings, and
lubricants. Motor bearings must be replaced by a motor service
shop. Replace all parts that have worn, corroded, eroded, or
otherwise deteriorated.
Use mechanical lifting equipment to lift assemblies and
components.
Do not apply heat to parts to assist in disassembly.
Explosion could occur causing personal injury, death,
and/or damage to equipment.
Use only Dean Pump Met-Pro Corporation parts.
Do not attempt to drill, saw or otherwise cut parts to
remove them. Explosion and/or fuming could occur causing personal injury, death, and/or equipment damage.
To reassemble the pump, perform the following steps:
a) Clean all parts thoroughly.
Do not hammer on any parts. Personal injury and/or damage to equipment may occur.
b) Place the adapter cradle (7) onto the motor pilot fit after
assuring that the fits are clean. Replace the adapter cradle capscrews (7G) and tighten them to the following
torque value.
a) The unit may be laid on its side (shaft in a horizontal
position) to afford easy access. Remove the impeller bolt
(12), impeller bolt gasket (77C), impeller washer (12A), and
the impeller washer gasket (77B). Discard the gaskets
(77C and 77B). The impeller may now be slid off the motor
shaft. Remove the impeller key (4) from the shaft keyway.
3/8" capscrew - torque to 20 Ft. Lb.
1/2" capscrew - torque to 45 Ft. Lb.
5/8" capscrew - torque to 70 Ft. Lb.
b) Remove the two casing back cover screws (22A). Pull
the casing back cover (22) out of the adapter cradle (7)
and off of the shaft. This will also pull the mechanical seal
rotary (95B), the mechanical seal stationary (95A), the
shaft sleeve (10), the impeller/sleeve gasket (77A), the
shaft sleeve key (10K), and possibly the splash collar (18)
off the shaft.
c) Drive a new seat lock pin (375) into the casing back
cover (22) from the impeller side of the casing back cover
(22). Be carefull to not damage the casing back cover (22).
Drive until the length of the pin (375) exposed to the inside
of the casing back cover (22) is 1/32" less than the depth
of the corresponding notch in the mechanical seal stationary (95A).
c) If the pump is a CNV206, remove the clearance shims
(37) from the casing back cover (22).
If you did not remove the original seat lock pin (375), be sure
to check the exposed length, as directed above, with respect
to the notch in your new mechanical seal stationary (95A).
d) Remove the impeller/sleeve gasket (77A) and the shaft
sleeve key (10K) from the shaft sleeve (10).
d) Install the mechanical seal stationary (95A) into the casing
back cover (22).
e) Pull the shaft sleeve (10) and the mechanical seal rotary
(95B) as an assembly from the open side of the casing back
cover (22), If the splash collar (18) was on the shaft sleeve
(10), it will be pulled off of the shaft sleeve (10) during this
operation. Depending upon the type of mechanical seal
selected for the service required, the splash collar may be
mounted upon the shaft sleeve (10) or on the shaft. If the
splash collar (18) is mounted on the shaft, pull it off now.
Mechanical seal stationarys (95A) are of two types,
depending on the service of the pump. The stationary may
be of rectangular cross section grooved for an “O” ring or
it may be of L-shaped cross-section used with a Teflon or
grafoil mounting ring.
To position the “O” ring mounted stationary, lubricate the
bore of the casing back cover (22). Place the “O” ring in
the groove of the stationary and carefully slide the stationary into position in the casing back cover (22). Be most
careful not to damage the “O” ring. Make sure that the
f) Remove the mechanical seal stationary (95A) from the casing back cover (22).
g) Remove the seat lock pin (375) from the casing back cover
9
DISASSEMBLY AND ASSEMBLY PROCEDURES
WARNING:
pump material; and the change in the vapor pressure of the
fluid between the temperature at the time the isolation
valves were closed and the ambient temperature. Bleeding must be through a valved drain line piped to a closed
container mounted lower than the pump. The container
must be arranged with a relief passage to some point
where pressure and fumes will not be harmful to personnel. The container must also have a level device so that
determination can be made that sufficient fluid has been
drained to empty the pump cavity and the volume of fluid
that was contained in the run of suction and discharge
pipe between the isolation valves and the pump. After the
initial rush of fluid from the pump relieves the pressure,
the drain valve can be opened further to speed the draining operation. When fluid quits running into the drain tank,
gauge the volume to see if it is sufficient to have fully
drained the contents of the pump and the suction and discharge pipes between the isolation valves.
Work must be performed only by thoroughly trained and
qualified personnel to assure quality repair and to reduce
the possibilities of injury to personnel and/or damage to
equipment. If you do not have personnel who are capable
of safe quality repair of this equipment, we advise you to
return the equipment to DEAN PUMP to be repaired.
When it is necessary to open the pump and/or the pumping system, the fluid will be exposed to the atmosphere
and personnel in the area. For the safety of all involved,
the risk of exposure of personnel to the hazards of the
pumpage can be reduced by flushing the entire system
with a compatible, nontoxic, non-hazardous, stable liquid
before opening the pump or the system. In all cases,
where the system is flushed or not, use the utmost care
around the pumpage and the, pumping system.
Always wear the appropriate protective apparel when
working on or around the pumping equipment. Safety
glasses with side shields, heavy work gloves (use insulated work gloves when handling hot items), steel-toed
shoes, hard hat, and any other protective gear as needed
for protection. One example of other gear would be
breathing apparatus when working near toxic materials.
f) Now drain any small piping, that contains the fluid
pumped, from all low points into the same container used
to drain the pump. Do not drain any other fluids (different
than the pumpage) into this container as they may not be
compatible. Personal injury, death, and/or equipment
damage could occur.
Use only top quality tools.
WARNING:
a) Stop the pump. Turn off the power supply (electricity,
steam, etc.) to the pump driver (motor, turbine, engine,
etc.) and lock the switching device so that it can not be
restarted. Tag the switching device so that no one will
attempt to restart the unit.
Even though it might appear that the cavity being
drained has completely drained, be extremely careful
about opening the system and/or opening the pump. If
something solid in the pumpage moves to the vicinity of
the drain connection, it could seal-off the drain and
maintain pressure in the cavity thought to have been
drained. It is also possible that the isolation valves are
not sealing and therefore allowing liquid to flow from the
system into the pump. Personal injury, death and/or
equipment damage may occur if great caution is not
exercised.
b) Disconnect the electrical wiring and the conduit from the
electric motor at the conduit box of the motor. We strongly
suggest that you mark the motor leads and the power supply leads to assure that they will be reconnected in the
same way so that the motor rotation will be correct when
the pump is restarted.
g) Because of the above possibility, when you loosen the
gasketed joint at the back of the casing (5), loosen the
casing capscrews (5D) only one full turn, and then use
jack screws in the flange of the adapter cradle (7) to break
the gasket seal. If fluid and/or pressure remains in the
pump it will spray out now. Use extreme caution, wearing
protective gear, to avoid injury. Do not proceed with disassembly until leakage ceases completely. If leakage does
not cease, the isolation valves may not be sealing.
c) Close the suction and discharge valves completely to
isolate the pump from the system. Lock the valves in the
closed position and tag them so that no one will attempt to
open them.
d) Turn off, lock out, and tag all sub-systems and auxiliary
equipment and auxiliary supply lines to isolate the pumping
unit from any and all power, energy, and/or fluids.
WARNING:
Do not attempt to perform any work on the unit until you are
confident that the pump and its contents have been stabilized
at ambient temperature, and atmospheric pressure.
WARNING:
When you open the pump, the fluid will be exposed to the
atmosphere and personnel in the area. For the safety of all
involved, the risk of exposure can be reduced by flushing the
cavity that was just drained with a compatible, non-toxic,
non-hazardous, stable liquid, before disassembling the
pump.
Put on protective wear to protect human tissue from attack by
the fluids contained in the pump and any sub-systems, and
from any vapors or fumes that could possibly be released
from these fluids. This could mean breathing apparatus face
shields, heavy long sleave rubber gloves, rubber apron, hood,
and possibly more, dependent, of course, on the properties of
the fluids involved and the installed drain and vent piping
arrangement. Personal injury and/or death can occur if adequate precautions are not taken with regard to the fluid, the
installation and the possibilities of the release of fluid, vapors,
and/or fumes.
h) Remove any auxillary piping that is attached to the pump.
i) Remove the casing capscrews (5D) and using a
mechanical lifting apparatus lift the rotating unit from the
casing (5).
j) Flush the wetted parts, now exposed, with a compatible,
non-toxic, non-hazardous, stable liquid.
e) Carefully bleed off any pressure remaining in the
pump. Pressure remaining in the pump will be dependent
upon the pressure in the system when the pump was
stopped; the quality, type, and condition of the isolation
valves; the thermal expansion values of the fluid and the
k) Remove the gasket from the face of the casing (5) or the
casing back cover (22) dependent on which one the gasket
may have adhered to. Exercise care not to damage the pump
sealing surfaces. The type of gasket and material of construction will vary with service requirements. Attack by prying and
8
may result. This can occur with any liquid, even “cold water”.
Personal injury, death, equipment damage, and/or loss of product (pumpage) is likely to occur. If your system is operated
where it is possible for all outlets of the discharge from the
pump to be closed while the pump is still operating, a modification of the system needs to be made to assure a continual flow
of pumpage through the pump. NOTE: Some people have a
belief that a bypass line from the discharge side of the pump to
the suction side of the pump will relieve this problem, this is
“NOT TRUE”; DO NOT ATTEMPT THIS.
WARNING:
discharge shut-off valve closed and the suction valve open,
the air can be exhausted from the pump and piping.
2) With a foot valve installed in the suction piping, the
pump may be filled with liquid introduced somewhere
above the pump in the discharge line. The seal chamber
should be vented to allow complete filling. A foot valve
may create extensive losses and should be taken into
consideration in calculating the available NPSH.
3) A vacuum pump (preferably a wet vacuum pump) may
be used for evacuating air from the pump and piping. The
vacuum pump should be connected as is the exhauster
covered in No. 1.
When the source of liquid supplied to the pump is above
atmospheric pressure or above the pump centerline, the pump
may be filled by venting through a bleed off line to atmosphere
or back to the pump suction source.
Do not operate a pump at a low flow condition, unless
provision has been made to prevent dangerous heat build
up within the pump casing. The liquid in the pump will heat
up and this may result in high pressure in the pump in a
short time. Such pressure may result in a rupture of the
pressure-containing parts and cause severe hazard to personnel and/or damage to the system.
It is most important to check the direction of rotation of the
pump before allowing the pump to come up to speed. To
check rotation direction, push the starting button and instantly
push the stop button. This will allow the motor to turn over a few
revolutions and the direction of rotation to be observed. A direction of rotation arrow is shown on the pump casing. If rotation is
incorrect, change the wiring connections and recheck rotation.
Operating the pump in reverse rotation may cause extensive damage.
OPERATING
A centrifugal pump should never be run without liquid In
the casing. Extensive damage may result, particularly to
the mechanical seal. Vent the pump seal chamber
through the seal connection to provide lubrication to the
mechanical seal faces.
A centrifugal pump should be started with the suction valve open
and the discharge valve opened a slight amount.
WARNING:
As soon as the pump is up to speed, the discharge valve must
be opened slowly. A centrifugal pump cannot be operated with
discharge valve closed without heating up dangerously. During
the first several minutes of operating. Watch the pump carefully
for overheating, vibration, and other abnormal conditions. If trouble develops, stop pump at once and correct the problem.
Before starting the unit, see that all personnel are a safe distance away from all possible hazards, that all sub-systems
are connected and operating, that all debris has been
removed, and that the pump is full of liquid.
Do not operate this pump at shut-off (no flow) as an explosion
PUMP START UP CHECK LIST
These points must be checked after pump installation and
before starting up the pump.
Replace and secure the motor fan cover.
1) Read instruction manual thoroughly and understand it.
6) Check to see that the motor bearings have been properly lubricated.
2) Review pump order head sheet for the service rating of
the pump and any special features.
7) Check the electrical connections to the motor. Unlock
and remove tag from the electrical supply to the motor.
8) “Bump” the motor starting button to check motor rotation.
Operating the pump in reverse rotation may cause extensive damage. If the rotation is not correct, lock out and tag
the electrical supply. Reconnect the wiring for proper rotation. Unlock and remove tag from the electrical supply to
the motor. Go through the above procedure again to check
the motor rotation.
3) Check all piping connections making certain that they
are both tight and in the proper location.
4) If a pump support base is being used, make sure that it
has been installed properly.
5) Lock out, and tag, the electrical supply to the motor.
Remove the motor fan cover. Rotate the motor shaft, by
hand, to be sure that there is no binding or rubbing within
the pump or the motor. Correct any difficulties at once.
9) Remove all dirt, waste, tools, and construction debris
from the area around the pumping unit.
SPARE PARTS
To avoid prolonged down time and facilitate rapid repair of
damaged pump parts, Dean recommends that the pump user
maintain a minimum stock of spare parts. If the pump service
is critical or the pump parts are of special materials, spare
parts stock is even more important to the user. Such spares
inventory may extend from a spare mechanical seal or seal
parts through complete casing backcover-impeller-motor
assemblies prepared for immediate insertion in the pump casing. Consult your Dean representative who will assist you in
selecting your spares stock.
following information is furnished by the customer with the
order:
1) Give the pump serial number and size. These may be
found on the pump name plate. The serial number is also
stamped on the suction flange of the pump.
2) Give the part name, part number, and material of part.
These should agree with the standard parts list.
3) Give the quantity of each part required.
4) Give complete shipping instructions.
ORDERING SPARE PARTS
Spare part orders will be handled with a minimum delay if the
5
SERIES CNV206/CNV236
CENTRIFUGAL PROCESS PUMPS
SERIES CNV206/CNV236
CENTRIFUGAL PROCESS PUMPS
PART
NO.
3
PART
PART NAME
Impeller
NO.
7G
PART
PART NAME
Adapter Cradle Capscrew
NO.
22
PART
PART NAME
Casing Back Cover
NO.
77A
PART
PART NAME
NO.
PART
PART NAME
Gasket - Impeller/Sleeve
3
Impeller
NO.
7G
PART
PART NAME
NO.
PART
PART NAME
Adapter Cradle Capscrew
22
Casing Back Cover
NO.
77A
PART NAME
Gasket - Impeller/Sleeve
4
Impeller Key
10
Shaft Sleeve
22A
Casing Back Cover Screw
77B
Gasket - Impeller/Washer
4
Impeller Key
10
Shaft Sleeve
22A
Casing Back Cover Screw
77B
Gasket - Impeller/Washer
5
Casing
10K
Shaft Sleeve Key
37
Clearance Shim
77C
Gasket - Impeller Bolt
5
Casing
10K
Shaft Sleeve Key
37
Clearance Shim
77C
Gasket - Impeller Bolt
5A
Casing Drain Plug
12
Impeller Bolt
56
Casing Foot - Optional
95A
Mechanical Seal Stationary
5A
Casing Drain Plug
12
Impeller Bolt
56
Casing Foot - Optional
95A
Mechanical Seal Stationary
5D
Casing Capscrew
12A
Impeller Washer
56A
Casing Foot Capscrew
95B
Mechanical Seal Rotary
5D
Casing Capscrew
12A
Impeller Washer
56A
Casing Foot Capscrew
95B
Mechanical Seal Rotary
7
Adapter Cradle
18
Splash Collar
77
Casing Gasket
375
Seat Lock Pin
7
Adapter Cradle
18
Splash Collar
77
Casing Gasket
375
Seat Lock Pin
6
7
SERIES CNV206/CNV236
CENTRIFUGAL PROCESS PUMPS
SERIES CNV206/CNV236
CENTRIFUGAL PROCESS PUMPS
PART
NO.
3
PART
PART NAME
Impeller
NO.
7G
PART
PART NAME
Adapter Cradle Capscrew
NO.
22
PART
PART NAME
Casing Back Cover
NO.
77A
PART
PART NAME
NO.
PART
PART NAME
Gasket - Impeller/Sleeve
3
Impeller
NO.
7G
PART
PART NAME
NO.
PART
PART NAME
Adapter Cradle Capscrew
22
Casing Back Cover
NO.
77A
PART NAME
Gasket - Impeller/Sleeve
4
Impeller Key
10
Shaft Sleeve
22A
Casing Back Cover Screw
77B
Gasket - Impeller/Washer
4
Impeller Key
10
Shaft Sleeve
22A
Casing Back Cover Screw
77B
Gasket - Impeller/Washer
5
Casing
10K
Shaft Sleeve Key
37
Clearance Shim
77C
Gasket - Impeller Bolt
5
Casing
10K
Shaft Sleeve Key
37
Clearance Shim
77C
Gasket - Impeller Bolt
5A
Casing Drain Plug
12
Impeller Bolt
56
Casing Foot - Optional
95A
Mechanical Seal Stationary
5A
Casing Drain Plug
12
Impeller Bolt
56
Casing Foot - Optional
95A
Mechanical Seal Stationary
5D
Casing Capscrew
12A
Impeller Washer
56A
Casing Foot Capscrew
95B
Mechanical Seal Rotary
5D
Casing Capscrew
12A
Impeller Washer
56A
Casing Foot Capscrew
95B
Mechanical Seal Rotary
7
Adapter Cradle
18
Splash Collar
77
Casing Gasket
375
Seat Lock Pin
7
Adapter Cradle
18
Splash Collar
77
Casing Gasket
375
Seat Lock Pin
6
7
DISASSEMBLY AND ASSEMBLY PROCEDURES
WARNING:
pump material; and the change in the vapor pressure of the
fluid between the temperature at the time the isolation
valves were closed and the ambient temperature. Bleeding must be through a valved drain line piped to a closed
container mounted lower than the pump. The container
must be arranged with a relief passage to some point
where pressure and fumes will not be harmful to personnel. The container must also have a level device so that
determination can be made that sufficient fluid has been
drained to empty the pump cavity and the volume of fluid
that was contained in the run of suction and discharge
pipe between the isolation valves and the pump. After the
initial rush of fluid from the pump relieves the pressure,
the drain valve can be opened further to speed the draining operation. When fluid quits running into the drain tank,
gauge the volume to see if it is sufficient to have fully
drained the contents of the pump and the suction and discharge pipes between the isolation valves.
Work must be performed only by thoroughly trained and
qualified personnel to assure quality repair and to reduce
the possibilities of injury to personnel and/or damage to
equipment. If you do not have personnel who are capable
of safe quality repair of this equipment, we advise you to
return the equipment to DEAN PUMP to be repaired.
When it is necessary to open the pump and/or the pumping system, the fluid will be exposed to the atmosphere
and personnel in the area. For the safety of all involved,
the risk of exposure of personnel to the hazards of the
pumpage can be reduced by flushing the entire system
with a compatible, nontoxic, non-hazardous, stable liquid
before opening the pump or the system. In all cases,
where the system is flushed or not, use the utmost care
around the pumpage and the, pumping system.
Always wear the appropriate protective apparel when
working on or around the pumping equipment. Safety
glasses with side shields, heavy work gloves (use insulated work gloves when handling hot items), steel-toed
shoes, hard hat, and any other protective gear as needed
for protection. One example of other gear would be
breathing apparatus when working near toxic materials.
f) Now drain any small piping, that contains the fluid
pumped, from all low points into the same container used
to drain the pump. Do not drain any other fluids (different
than the pumpage) into this container as they may not be
compatible. Personal injury, death, and/or equipment
damage could occur.
Use only top quality tools.
WARNING:
a) Stop the pump. Turn off the power supply (electricity,
steam, etc.) to the pump driver (motor, turbine, engine,
etc.) and lock the switching device so that it can not be
restarted. Tag the switching device so that no one will
attempt to restart the unit.
Even though it might appear that the cavity being
drained has completely drained, be extremely careful
about opening the system and/or opening the pump. If
something solid in the pumpage moves to the vicinity of
the drain connection, it could seal-off the drain and
maintain pressure in the cavity thought to have been
drained. It is also possible that the isolation valves are
not sealing and therefore allowing liquid to flow from the
system into the pump. Personal injury, death and/or
equipment damage may occur if great caution is not
exercised.
b) Disconnect the electrical wiring and the conduit from the
electric motor at the conduit box of the motor. We strongly
suggest that you mark the motor leads and the power supply leads to assure that they will be reconnected in the
same way so that the motor rotation will be correct when
the pump is restarted.
g) Because of the above possibility, when you loosen the
gasketed joint at the back of the casing (5), loosen the
casing capscrews (5D) only one full turn, and then use
jack screws in the flange of the adapter cradle (7) to break
the gasket seal. If fluid and/or pressure remains in the
pump it will spray out now. Use extreme caution, wearing
protective gear, to avoid injury. Do not proceed with disassembly until leakage ceases completely. If leakage does
not cease, the isolation valves may not be sealing.
c) Close the suction and discharge valves completely to
isolate the pump from the system. Lock the valves in the
closed position and tag them so that no one will attempt to
open them.
d) Turn off, lock out, and tag all sub-systems and auxiliary
equipment and auxiliary supply lines to isolate the pumping
unit from any and all power, energy, and/or fluids.
WARNING:
Do not attempt to perform any work on the unit until you are
confident that the pump and its contents have been stabilized
at ambient temperature, and atmospheric pressure.
WARNING:
When you open the pump, the fluid will be exposed to the
atmosphere and personnel in the area. For the safety of all
involved, the risk of exposure can be reduced by flushing the
cavity that was just drained with a compatible, non-toxic,
non-hazardous, stable liquid, before disassembling the
pump.
Put on protective wear to protect human tissue from attack by
the fluids contained in the pump and any sub-systems, and
from any vapors or fumes that could possibly be released
from these fluids. This could mean breathing apparatus face
shields, heavy long sleave rubber gloves, rubber apron, hood,
and possibly more, dependent, of course, on the properties of
the fluids involved and the installed drain and vent piping
arrangement. Personal injury and/or death can occur if adequate precautions are not taken with regard to the fluid, the
installation and the possibilities of the release of fluid, vapors,
and/or fumes.
h) Remove any auxillary piping that is attached to the pump.
i) Remove the casing capscrews (5D) and using a
mechanical lifting apparatus lift the rotating unit from the
casing (5).
j) Flush the wetted parts, now exposed, with a compatible,
non-toxic, non-hazardous, stable liquid.
e) Carefully bleed off any pressure remaining in the
pump. Pressure remaining in the pump will be dependent
upon the pressure in the system when the pump was
stopped; the quality, type, and condition of the isolation
valves; the thermal expansion values of the fluid and the
k) Remove the gasket from the face of the casing (5) or the
casing back cover (22) dependent on which one the gasket
may have adhered to. Exercise care not to damage the pump
sealing surfaces. The type of gasket and material of construction will vary with service requirements. Attack by prying and
8
may result. This can occur with any liquid, even “cold water”.
Personal injury, death, equipment damage, and/or loss of product (pumpage) is likely to occur. If your system is operated
where it is possible for all outlets of the discharge from the
pump to be closed while the pump is still operating, a modification of the system needs to be made to assure a continual flow
of pumpage through the pump. NOTE: Some people have a
belief that a bypass line from the discharge side of the pump to
the suction side of the pump will relieve this problem, this is
“NOT TRUE”; DO NOT ATTEMPT THIS.
WARNING:
discharge shut-off valve closed and the suction valve open,
the air can be exhausted from the pump and piping.
2) With a foot valve installed in the suction piping, the
pump may be filled with liquid introduced somewhere
above the pump in the discharge line. The seal chamber
should be vented to allow complete filling. A foot valve
may create extensive losses and should be taken into
consideration in calculating the available NPSH.
3) A vacuum pump (preferably a wet vacuum pump) may
be used for evacuating air from the pump and piping. The
vacuum pump should be connected as is the exhauster
covered in No. 1.
When the source of liquid supplied to the pump is above
atmospheric pressure or above the pump centerline, the pump
may be filled by venting through a bleed off line to atmosphere
or back to the pump suction source.
Do not operate a pump at a low flow condition, unless
provision has been made to prevent dangerous heat build
up within the pump casing. The liquid in the pump will heat
up and this may result in high pressure in the pump in a
short time. Such pressure may result in a rupture of the
pressure-containing parts and cause severe hazard to personnel and/or damage to the system.
It is most important to check the direction of rotation of the
pump before allowing the pump to come up to speed. To
check rotation direction, push the starting button and instantly
push the stop button. This will allow the motor to turn over a few
revolutions and the direction of rotation to be observed. A direction of rotation arrow is shown on the pump casing. If rotation is
incorrect, change the wiring connections and recheck rotation.
Operating the pump in reverse rotation may cause extensive damage.
OPERATING
A centrifugal pump should never be run without liquid In
the casing. Extensive damage may result, particularly to
the mechanical seal. Vent the pump seal chamber
through the seal connection to provide lubrication to the
mechanical seal faces.
A centrifugal pump should be started with the suction valve open
and the discharge valve opened a slight amount.
WARNING:
As soon as the pump is up to speed, the discharge valve must
be opened slowly. A centrifugal pump cannot be operated with
discharge valve closed without heating up dangerously. During
the first several minutes of operating. Watch the pump carefully
for overheating, vibration, and other abnormal conditions. If trouble develops, stop pump at once and correct the problem.
Before starting the unit, see that all personnel are a safe distance away from all possible hazards, that all sub-systems
are connected and operating, that all debris has been
removed, and that the pump is full of liquid.
Do not operate this pump at shut-off (no flow) as an explosion
PUMP START UP CHECK LIST
These points must be checked after pump installation and
before starting up the pump.
Replace and secure the motor fan cover.
1) Read instruction manual thoroughly and understand it.
6) Check to see that the motor bearings have been properly lubricated.
2) Review pump order head sheet for the service rating of
the pump and any special features.
7) Check the electrical connections to the motor. Unlock
and remove tag from the electrical supply to the motor.
8) “Bump” the motor starting button to check motor rotation.
Operating the pump in reverse rotation may cause extensive damage. If the rotation is not correct, lock out and tag
the electrical supply. Reconnect the wiring for proper rotation. Unlock and remove tag from the electrical supply to
the motor. Go through the above procedure again to check
the motor rotation.
3) Check all piping connections making certain that they
are both tight and in the proper location.
4) If a pump support base is being used, make sure that it
has been installed properly.
5) Lock out, and tag, the electrical supply to the motor.
Remove the motor fan cover. Rotate the motor shaft, by
hand, to be sure that there is no binding or rubbing within
the pump or the motor. Correct any difficulties at once.
9) Remove all dirt, waste, tools, and construction debris
from the area around the pumping unit.
SPARE PARTS
To avoid prolonged down time and facilitate rapid repair of
damaged pump parts, Dean recommends that the pump user
maintain a minimum stock of spare parts. If the pump service
is critical or the pump parts are of special materials, spare
parts stock is even more important to the user. Such spares
inventory may extend from a spare mechanical seal or seal
parts through complete casing backcover-impeller-motor
assemblies prepared for immediate insertion in the pump casing. Consult your Dean representative who will assist you in
selecting your spares stock.
following information is furnished by the customer with the
order:
1) Give the pump serial number and size. These may be
found on the pump name plate. The serial number is also
stamped on the suction flange of the pump.
2) Give the part name, part number, and material of part.
These should agree with the standard parts list.
3) Give the quantity of each part required.
4) Give complete shipping instructions.
ORDERING SPARE PARTS
Spare part orders will be handled with a minimum delay if the
5
job. In addition, special filtering and mechanical seal flushing guards
may be required. Consult your Dean representative. Suction line
screens or strainers may usually be removed when, after several
days of use, no dirt has been collected and the system is clean.
When a pump support base is not used, adequate pipe supports must be provided for the piping at locations close on
either side of the pump.
The foundation for the pump support base need not be elaborate. Four hold down bolt holes are provided in each base and
the foundation should include four studs to match these holes.
The support base should be seated in a thin layer of grout to
assure even support.
Remember that screens and filters in the suction line are restricting devices which reduce the net positive suction head (NPSH)
available to the pump and should be considered at the time the
system is designed.
SUCTION AND DISCHARGE PIPING
Install “new” gaskets, of the correct material for the service, and
the correct size per ASME B16.20 or ASME B16.21 at the suction
and the discharge flanges of the pump. Use only new gaskets.
Connect the suction and discharge piping without forcing the piping into position. The pipe flanges must line up with the pump
flanges “freely”.
Suction and discharge nozzle sizes of Dean pumps are selected for proper performance of the pumping unit and are not
intended to determine the suction and discharge pipe sizes.
Pipe sizes must be determined by the user based on the system requirements.
WARNING:
Strain caused by “forcing”, improper flange bolting, and/or misalignment may cause failure of the pumping unit, flanges, piping
and/or fluid (pumpage) release which could cause personal injury,
death, and/or damage to this and/or other equipment.
Suction piping should have a minimum friction loss and thus
should be as short and straight as possible with a pipe
diameter as large as economically feasible for the flow rate
handled. Suction piping should never be smaller in diameter
than the suction nozzle size. When the suction piping is larger
than the suction nozzle size an eccentric reducer is required at
the suction flange and must be installed with the taper located
on the underside to eliminate air or vapor pockets. The section of piping attached to the suction flange of the pump
should be straight for a length of eight pipe diameters or more.
Install a “new” bolt, of the correct size per ASME/ANSI B16.5 and
the correct material per ASME/ANSI B16.5, in every bolt hole.
Tighten all bolts evenly. Use only new uncorroded fasteners.
Connect all other (auxiliary) piping necessary for safe and successful operation of the equipment in the specific service conditions of the application.
WARNING:
Make sure that all piping is installed into its correct connection.
Installation of a pipe into an incorrect location could result in an
explosion and personal injury or death as well as damage to this
and/or other equipment.
Discharge piping may be the same size as, larger, or smaller
than the discharge nozzle as the system flow may demand.
In new installations or rebuilt systems, dirt, pipe scale, welding
slag, and general construction debris may get into the piping. It is
important to prevent this material from entering the pump and
damaging pump parts, or mechanical seal faces. Mechanical seal
parts are especially subject to damage even by very small particles. To prevent damage, a strainer or filter installed in the suction line is recommended. Commercially available strainers or filters as recommended by their manufacturers can do an excellent
Install pressure relief valves in any cavities that could be subjected
to pressures in excess of the allowable working pressure. Explosion, personal injury, death, and/or damage to this and/or other
equipment may occur if pressure exceeds allowable.
MOTOR BEARING LUBRICATION
Pump motor bearings are properly lubricated for nominal service conditions when the unit is shipped from the factory,
dependent upon motor style, motor size, and motor manufacturer, the bearings may be “sealed for life” or “regreasable”.
remove the grease fitting and replace the pipe plugs.
The proper grease lubricant depends on the ambient temperature, the pumping temperature, and the atmospheric contamination at each pump installation. Specific lubricants, lubrication
schedule, and lubrication instructions must be obtained by the
customer from his local lubrication specialist.
If the motor is of the “regreasable” type, the grease inlet and
outlet connections will be closed with pipe plugs. When you
need to regrease the motor bearings, remove the two pipe
plugs for each bearing and insert a grease fitting in the inlet
hole. Use a low pressure grease gun to inject the proper grade
of new grease. The grease cavity should be filled no more
than three fourths (3/4) full. Overlubrication may cause early
bearing failure. Run the motor until it has warmed up and then
In general, for reasonable ambient and contamination free
atmosphere, a high quality lithium #2 grease will usually give
satisfactory performance at the pumping temperature of these
pumps.
STARTING THE PUMP
It is important that a pump should never be subjected to thermal or pressure shock. The liquid should therefore be allowed
to flow into the casing slowly. A centrifugal pump should
never be started until all the parts are up to the temperature
of the liquid to be pumped.
are sealed or connected to a related piping system that also
has all possible leak paths sealed. Use a wrench on all bolted
joints to apply torque to assure that all gaskets are sealed in a
tight joint. Check to see that all threaded pipe connections are
also tight enough to seal the liquid pressure that will be
applied when the system is started.
FILLING
When the source of liquid supplied to the pump is below
atmospheric pressure or located below the pump, the pump
must be primed prior to start up. The priming may be accomplished in any of several ways, three of which are listed.
WARNING:
Before filling the pump with liquid, check to see that all possible leak locations are sealed. See that the point where the
pump shaft enters the pressure containing cavity is sealed.
This sealing is accomplished with a mechanical face seal. See
that all of the connections into the pressure containing cavity
1) An exhauster may be connected to the discharge piping
between the pump and the discharge shut-off valve. With the
4
(22). Use a drive pin punch, with a 3/64" punch end, and
drive from the motor side of the casing back cover (22). Be
carefull to not damage the casing back cover (22).
then, if necessary, layering off the old gasket with a sharp
scraper, attempting to remove it in the largest possible pieces.
Wear heavy leather, long sleeve work gloves when using the
scraper. Wet the gasket before and during the scraping operation to reduce the possibility of fibers becoming airborne. Wear
a respirator during this operation and until all debris has been
disposed of in a plastic bag. Remove all of the gasket material
down to clean metal surfaces on both parts that contacted the
gasket. Place all of the gasket residue in a plastic bag, seal the
bag and dispose.
h) Remove the mechanical seal rotary (95B) from the shaft
sleeve (10). Refer to the mechanical seal drawing that was
furnished with the pump. Some types of mechanical seals are
retained with radial and/or axial screws.
i) Remove the four adapter cradle capscrews (7) and
remove the adapter cradle (7) from the motor.
j) If the pump is a CNV236, remove the four clearance
shim (37) stacks from the face of the adapter cradle (7)
and/or the face of the motor.
l) The casing backcover-impeller-motor assembly of the pump can
now be moved to a more convenient location for further disassembly. Use mechanical lifting equipment to move assemblies
and components.
k) Clean and inspect all parts.
REASSEMBLY PROCEDURE
WARNING:
Use only high quality tools.
DISASSEMBLY PROCEDURE
To further dismantle the pump, perform the following steps in
the sequence shown:
Wear protective equipment as advised at the beginning of this
section.
WARNING:
Use only high quality tools.
Use mechanical lifting equipment to lift assemblies and
components.
Flush parts as disassembled to remove hazardous
residue from the pumpage and/or sub-system fluids.
Do not hammer on any parts. Personal injury and/or damage to
equipment may occur.
Wear protective equipment as advised at the beginning
of this section.
Do not attempt to manufacture parts or modify Dean Pump
parts in any manner. Death, personal injury, and/or damage to
equipment may occur. Replace all gaskets, seals, bearings, and
lubricants. Motor bearings must be replaced by a motor service
shop. Replace all parts that have worn, corroded, eroded, or
otherwise deteriorated.
Use mechanical lifting equipment to lift assemblies and
components.
Do not apply heat to parts to assist in disassembly.
Explosion could occur causing personal injury, death,
and/or damage to equipment.
Use only Dean Pump Met-Pro Corporation parts.
Do not attempt to drill, saw or otherwise cut parts to
remove them. Explosion and/or fuming could occur causing personal injury, death, and/or equipment damage.
To reassemble the pump, perform the following steps:
a) Clean all parts thoroughly.
Do not hammer on any parts. Personal injury and/or damage to equipment may occur.
b) Place the adapter cradle (7) onto the motor pilot fit after
assuring that the fits are clean. Replace the adapter cradle capscrews (7G) and tighten them to the following
torque value.
a) The unit may be laid on its side (shaft in a horizontal
position) to afford easy access. Remove the impeller bolt
(12), impeller bolt gasket (77C), impeller washer (12A), and
the impeller washer gasket (77B). Discard the gaskets
(77C and 77B). The impeller may now be slid off the motor
shaft. Remove the impeller key (4) from the shaft keyway.
3/8" capscrew - torque to 20 Ft. Lb.
1/2" capscrew - torque to 45 Ft. Lb.
5/8" capscrew - torque to 70 Ft. Lb.
b) Remove the two casing back cover screws (22A). Pull
the casing back cover (22) out of the adapter cradle (7)
and off of the shaft. This will also pull the mechanical seal
rotary (95B), the mechanical seal stationary (95A), the
shaft sleeve (10), the impeller/sleeve gasket (77A), the
shaft sleeve key (10K), and possibly the splash collar (18)
off the shaft.
c) Drive a new seat lock pin (375) into the casing back
cover (22) from the impeller side of the casing back cover
(22). Be carefull to not damage the casing back cover (22).
Drive until the length of the pin (375) exposed to the inside
of the casing back cover (22) is 1/32" less than the depth
of the corresponding notch in the mechanical seal stationary (95A).
c) If the pump is a CNV206, remove the clearance shims
(37) from the casing back cover (22).
If you did not remove the original seat lock pin (375), be sure
to check the exposed length, as directed above, with respect
to the notch in your new mechanical seal stationary (95A).
d) Remove the impeller/sleeve gasket (77A) and the shaft
sleeve key (10K) from the shaft sleeve (10).
d) Install the mechanical seal stationary (95A) into the casing
back cover (22).
e) Pull the shaft sleeve (10) and the mechanical seal rotary
(95B) as an assembly from the open side of the casing back
cover (22), If the splash collar (18) was on the shaft sleeve
(10), it will be pulled off of the shaft sleeve (10) during this
operation. Depending upon the type of mechanical seal
selected for the service required, the splash collar may be
mounted upon the shaft sleeve (10) or on the shaft. If the
splash collar (18) is mounted on the shaft, pull it off now.
Mechanical seal stationarys (95A) are of two types,
depending on the service of the pump. The stationary may
be of rectangular cross section grooved for an “O” ring or
it may be of L-shaped cross-section used with a Teflon or
grafoil mounting ring.
To position the “O” ring mounted stationary, lubricate the
bore of the casing back cover (22). Place the “O” ring in
the groove of the stationary and carefully slide the stationary into position in the casing back cover (22). Be most
careful not to damage the “O” ring. Make sure that the
f) Remove the mechanical seal stationary (95A) from the casing back cover (22).
g) Remove the seat lock pin (375) from the casing back cover
9
lapped face of the stationary is toward the open side of the
casing back cover (22).
t) Recheck the clearance between the impeller (3) and the casing back cover (22) using a feeler gauge. The clearance at the
nearest blade of the impeller (3) must be between 0.008" and
0.012". If not, change the clearance shims to obtain this value.
To position the Teflon or grafoil mounted stationary, lubricate
the bore of the casing back cover (22). Carefully slide the
Teflon or grafoil mounting ring into position in the casing back
cover (22) lubricate the outer diameters of the stationary and
then slide it into place. The slot (or pin) in the stationary must
index with the drive pin (or slot) in the casing back cover (22).
u) Refer to the mechanical seal drawing supplied with this pump
to find the mounting location and arrangement for the seal that is
being installed. Lubricate the outer diameter of the shaft sleeve
(10). Orient the mechanical seal rotary (95B) with respect to the
shaft sleeve (10) as shown on the seal drawing. Slide the rotary
(95B) onto the shaft sleeve (10) being careful to not scratch the
sleeve and to not damage the elastomer/seal that seals the
rotary (95B) to the sleeve (10). Position the rotary (95B) with
respect to the impeller (3) end of the shaft sleeve (10) at the
dimension shown on the mechanical seal drawing. If the rotary
(95B) being installed has radially positioned setscrews, securely
set these using a tightening pattern of gradually tightening alternate screws. Recheck the rotary (95B) location with respect to
the end of the shaft sleeve.
e) Carefully guide the casing back cover (22) over the center of the motor shaft and pilot it into the adapter cradle (7).
Retain these parts together by installing the two casing
back cover screws (22A) and tightening them.
f) Slide the shaft sleeve (10) into position on the motor shaft.
g) Place the impeller/sleeve gasket (77A) carefully over the
shaft and into position against the face of the shaft sleeve (10).
h) Carefully slide the impeller (3) onto the shaft and against
the impeller/sleeve gasket (77A). Place the impeller washer
(12A) onto the impeller bolt (12) and then screw it into the
end of the motor shaft. Tighten the impeller bolt (12).
v) Carefully slide the shaft sleeve (10) onto the motor shaft.
As the sleeve (10) starts to protrude through the casing
back cover, center the splash collar (18) with the sleeve
(10) and force it onto the sleeve (10). Continue to slide the
sleeve (10) onto the shaft until the mechanical seal rotary
(95B) contacts the mechanical seal stationary (95A).
i) Carefully measure the distance between the impeller (3)
and the face of the casing back cover (22), using a feeler
gauge. Subtract 0.010" from this measurement to obtain
the thickness of the required clearance shims (37).
j) Remove the impeller bolt (12), impeller washer (12A),
impeller (3), impeller/sleeve gasket (77A), shaft sleeve
(10), casing back cover screws (22A), and carefully remove
the casing back cover (22).
k) If the pump is a CNV236 go to step p).
w) Rotate the shaft sleeve (10) on the motor shaft until the keyways in both align with each other. Slide the shaft sleeve key
(10K) into the keyway between the shaft sleeve (10) and the
motor shaft. Slide the impeller/sleeve gasket (77A) over the
motor shaft and against the face of the shaft sleeve (10).
l) Place a new set of clearance shims (37), of total thickness equal to the value determined in i) above, over the
pilot fit of the casing back cover (22). See clearance shim
(37) location on CNV206 Sectional Assembly 01962A.
x) Place the impeller key (4) into the keyway of the motor
shaft. Align the keyway of the impeller (3) with the impeller
key (4), and slide the impeller (3) over the motor shaft and
against the impeller/sleeve gasket (77A).
m) Place the splash collar (18) over the motor shaft and
close to the face of the motor.
y) Place the impeller bolt gasket (77C), the impeller washer
(12A), and the impeller/washer gasket (77B), on to the
impeller bolt (12). Thread the impeller bolt (12) assembly
into the end of the motor shaft and torque the bolt (12) to
the following value.
n) Carefully slide the casing back cover (22) over the center of
the motor shaft and pilot it into the adapter cradle (7), capturing
the clearance shims (37) between the adapter cradle (7) and
the casing back cover (22). Install the two casing back cover
screws and tighten them to 10 Ft. Lb. of torque.
capability of the system to retain it, therefore causing an
explosion that could prove fatal.
compatable with the liquid to be pumped. Evaluation of
compatability must include consideration of the temperature at which the system will later operate.
5) Replace all pipe plugs and tighten them. Tighten any
and all auxillary piping connections that may have been
loosened.
4) Discard the storage liquid and the flush liquid. Be sure to
comply with governmental regulations in any disposal.
6) Remove the “storage” protective coatings from the external surfaces of the pump.
WARNING:
Be sure that there is nothing remaining in the pump or piping that could react with the liquid that will be pumped or
that would have an excessive vapor pressure at the system
operating temperature. For example, solvent residue left in
the pump, when exposed to the operating temperature of
the system, could create a vapor pressure in excess of the
Pumps must also be protected from moisture, dirt, and physical damage, during and after installation while the system is
being completed. Pumps “stored” as installed in the piping
system must be completely checked for proper installation
prior to start-up.
INSTALLATION
Always wear the appropriate protective apparel when working
on or around the pumping equipment. Safety glasses with side
shields, heavy work gloves (use insulated work gloves when
handling hot items), steel-toed shoes, hard hat, and any other
protective gear as needed for protection. One example of other
gear would be breathing apparatus when working near toxic
materials. Use lifting devices, manufactured expressly for the
purpose of lifting, to move the pumping machinery. Do not
attempt to lift the assembly or its components manually. Use
only devices with lifting capabilities in excess of the weight of the
unit being lifted. Inspect straps, chains, hooks, etc. for damage
and lifting capability before use. Lift only at the center of gravity.
inside. Personal injury, death, equipment damage, product
(pumpage) damage, and/or product loss could occur if the
incorrect pump is installed.
Do not transfer an existing pump to any other service conditions
until you have thoroughly reviewed the pump construction, materials, sizing, sealing, pressure containing capability, head/capacity capability, and temperature capability with respect to the
required service. Consult your Dean Pump sales engineer with
all the service requirements and a full description of the existing
pump (including the serial number), seal, and sub-systems so
that we can assist you in a successful reapplication.
PUMP MOUNTING
Personal injury, death, and/or equipment damage could occur if
good lifting practices are not used.
It is recommended that CNV206 Series and CNV236 Series
pumps be mounted with the motor vertically upright. Other
positions are possible if adequate support is provided.
APPLICATION AND REAPPLICATION
At the time of installation, the equipment received should
have already been selected for the service required. You
must read the paperwork for the installation and check the
serial number of the pump to assure that you are installing
the correct pump into the service for which it was selected.
A pump support base for vertically upright mounting is
required in accordance with this tabulation:
Pump Size
1 x 1-1/2 x 6 CNV206 Series
1-1/2 x 3 x 6 CNV206 Series
All CNV236 Series
Many pumps look identical from the outside but can be
made of different materials and/or be constructed differently
3/8" bolt - 20 Ft. Lb.
1/2" bolt - 45 Ft.Lb.
o) Go to step t).
z) Rotate the motor shaft by turning the impeller (3) by
hand (wear heavy gloves) to be certain that there is no
internal interference.
p) Loosen the adapter cradle capscrews (7G) two or three
full turns. Insert four sets of clearance shims (37) between
the adapter cradle (7) and the motor. One set to be inserted at each of the adapter cradle capscrews (7G). See
clearance shim (37) location on CNV236 Sectional Assembly 01956A. Each set of clearance shims (37) must be of
total thickness equal to the value determined in i) above.
aa) The rotating assembly is now ready to be returned to
the installation site for final assembly.
ab) Place a new casing gasket (77) into the recess in the
casing (5). Use a mechanical lifting apparatus to lower the
rotating assembly into the casing (5). Install the casing capscrews (50) and tighten them to the following values.
q) Tighten the adapter cradle capscrews (7G) being careful
to maintain the clearance shims (37) in their proper locations and assuring that the pilot fits of the adapter cradle (7)
and the motor are aligned. Torque the adapter cradle capscrews to the following value.
1/2" capscrews - 50 Ft. Lb.
5/8" capscrews - 75 Ft.Lb.
ac) Remove the motor fan cover and rotate the motor shaft
by turning the motor fan by hand (wear heavy gloves) to be
certain that there is no internal interference. Replace the
motor fan cover and fasten it securely in place.
3/8" capscrews - torque to 20 Ft. Lb.
1/2" capscrews - torque to 45 Ft. Lb.
5/8" capscrews - torque to 70 Ft. Lb.
ad) Reinstall all auxillary piping, systems and equipment.
r) Place the splash collar (18) over the motor shaft and
close to the face of the motor.
ae) Check to see that all openings have been sealed
before filling the pump with liquid.
s) Carefully slide the casing back cover (22) over the center
of the motor shaft and pilot it into the adapter cradle (7).
Install the two casing back cover screws (22A) and tighten
them to 20 Ft. Lb. of torque.
af) Reconnect the electrical wiring and conduit.
Typical Pump Piping
ag) Follow the instructions under “STARTING THE PUMP”
and “PUMP START UP CHECKLIST”.
10
3
Use Base Above HP
Base not required
Base not required
15
TYPICAL MECHANICAL SEALS
PRODUCT INSPECTION AND TEST
signed certificate of inspection prior to shipment. Each pump
when shipped is ready to perform the service for which it was
designed with minimum maintenance and expense if properly
installed and operated in accordance with the instructions
furnished.
The Products of Dean Pump Division are subject to thorough
and rigorous quality control and inspection procedures
throughout the whole of the manufacturing process to assure
proper operation in full conformity with established performance standards. On completion of inspection, each unit is
oiled, sealed against the entrance of dirt, and tagged with a
DEAN PRODUCT WARRANTY
We warrant to the purchaser from us of Dean Pump products
and parts of our own manufacture (Dean Products) that the
Dean Products are free under rated use and service from
defects in design, material and workmanship for a period of
one (1) year from the date of installation, but not to exceed
eighteen (18) months from the date of shipment by us. This
warranty does not cover (I) any loss or damage resulting
from wear, corrosion, abrasion or deterioration due to normal
use in rated service; (II) replacement of service items such
as bearings and mechanical seals; (III) products or parts
manufactured by others but furnished by us which, if defective, shall be repaired or replaced only to the extent of the
original manufacturer’s warranty; (IV) any loss or damage to,
or defects in, any Dean Products resulting from the misuse
or improper storage, installation, or operation thereof; or (V)
any loss or damages to, or defects in, any Dean Products
resulting from any alteration or modification thereof not
expressly authorized and approved by us in writing. We
shall not be liable, directly or indirectly, under any circumstances for consequential or incidental damages, including,
but not limited, to: (I) any loss of business or profits; and (II)
labor, material or other charges, claims, losses or damages
incurred or suffered from, in connection with or in consequence of the working upon, alteration, or repair of any
defective Dean Products by persons or firms other than us.
Our liability for breach of warranty hereunder is limited solely
to the repair in our factory or the replacement F.O.B. our factory, as the case may be, of any Dean Products which shall
have been determined by us, after notice to us and inspection by us within the warranty period, to be so defective
when shipped by us. THIS WARRANTY AND THE LIABILITY SET FORTH HEREIN ARE EXCLUSIVE AND IN LIEU
OF ALL OTHER LIABILITIES AND WARRANTIES,
EXPRESSED OR IMPLIED, INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT NESS FOR
PARTICULAR PURPOSE.
STYLE “A”
WARNING
HAZARDOUS SITUATIONS MAY OCCUR UNLESS THIS EQUIPMENT IS APPLIED, INSTALLED,
OPERATED, AND MAINTAINED BY THOROUGHLY QUALIFIED PERSONNEL IN STRICT ACCORDANCE WITH THE INSTRUCTION MANUAL AND ALL APPLICABLE DRAWINGS AND CODES.
Read the instruction manual completely before installing,
filling, operating, or maintaining this equipment.
1) Seal the suction opening of the pump with a blind flange,
gasket, and bolts.
Obtain, read and heed the MSDS (Material Safety Data
Sheet) for the fluids being handled before attempting to fill,
operate or maintain this equipment. Obtain instructions from
the Safety Engineer responsible for your facility before performing any work on the pumping equipment and systems.
2) Position the pump on its side so that the motor shaft is
horizontal, the suction flange is down, and the discharge
flange is up.
STYLE “B”
3) Fill through the discharge opening of the pump a corrosion inhibiting liquid that is also compatible with the liquid
that will later be pumped. Evaluation of compatibility
must include consideration of the temperature at which
the system will later operate. Be sure to also vent air
from any auxillary piping connection to the pump and fill
it with the same inhibitor.
Proper storage while not in use and proper installation and
startup are essential for successful pump operation. Misuse
or improper storage, installation or operation of pumps may
result in serious loss or damage. Dean Pump Division is not
responsible for any loss or damage resulting from causes
beyond its control, and is not liable for charges for work performed or materials furnished to repair such loss or damage.
4) When the pump is completely filled, seal the discharge
opening with a blind flange, gasket, and bolts.
All installation, operation, and maintenance must be
done by thoroughly qualified personnel in strict accordance with this manual and must comply with all local,
state and Federal codes. Only Dean authorized service
parts must be used in the repair of these pumps.
5) Apply a heavy protective coating to any exposed metal
surfaces. A rust preventive must be used to protect all
steel and iron parts.
6) Rotate the motor shaft “by hand” each month. Wear heavy
gloves when rotating the shaft, to protect your hands. It will
most likely be necessary to remove the motor fan cover to
gain access to the motor fan to rotate the shaft.
RECEIVING PUMP
When the pump is received from the transportation company it should be promptly inspected for damage and such damage noted on the bill of lading before
it is signed. Claims for shipping damage must be filed
against the carrier.
When you are ready to place the pump in service;
1) Drain the storage liquid from the pump and any auxillary piping. Draining can be through the casing drain
connection, the auxillary piping, the suction flanged
connection, and the discharge flanged connection.
2) Remove and discard the blind suction flange, gasket,
and bolts. Remove and discard the blind discharge
flange, gasket, and bolts.
Care must be exercised in unloading and handling the pump.
STORAGE
Pumps must be properly covered and protected against
moisture, dirt, and physical damage during storage prior to
installation and operation.
STYLE “A”
STYLE “B”
3) Flush all remains of the storage liquid from the pump
and the auxillary piping. Use a flush liquid that is
If prolonged storage is anticipated, do the following:
2
11
TYPICAL MECHANICAL SEALS
STANDARD, INLINE, SINGLE STAGE, OPEN
IMPELLER, CENTRIFUGAL PROCESS PUMPS
TYPES CNV206, CNV236
INLINE, SINGLE STAGE, OPEN IMPELLER, CENTRIFUGAL PROCESS PUMPS
TYPES CNV206, CNV236
MECHANICAL DESIGN SPECIFICATIONS
CNV206 CNV236
Horsepower Rating - max. rated
Driver HP not to exceed @ 1750 rpm
@ 3500 rpm
Max. Hydrostatic Test Pressure
Ductile Iron (CL 22), and 316 S/S (CL 50)
STYLE “B”
5 HP
10 HP
25 HP
50 HP
WORKING PRESSURE - - KPa
STYLE “A”
PUMPING TEMPERATURE - - DEGREES C.
WORKING PRESSURE - - P. S. I. G.
Direction of Rotation from Motor End
CW
Bearings in Motor
Ball Type
Bearing Lubrication
Grease
Casing Thickness, Minimum
5/16"
Flanges - A.N.S.I. Class:
Ductile Iron (CL 22), 316 S/S (CL 50)
150
Facing
FF
Finish
125 Ra
Impeller Balance
Single Plane Dynamic Balance
Allowable Pump Suction Pressure
100 psig
(2 year minimum thrust bearing life)
ALLOWABLE WORKING PRESSURE
VS PUMPING TEMPERATURE
430 psig 430 psig
PUMPING TEMPERATURE - - DEGREES F.
All pumps contain a seal face flushing connection in the stuffing box and internal
seal circulating piping as standard.
STANDARD MATERIALS OF CONSTRUCTION
PART
NO.
PART
PART NAME
CLASS 22
CLASS 50
NO.
CLASS 50
Cast Iron (1)
316 S/S (11)
18
Splash Collar
Rubber (7)
4
Impeller Key
Steel (4)
Steel (4)
22
Casing Back Cover
Cast Iron (1)
316 S/S (11)
5
Casing
Ductile Iron (5)
316 S/S (11)
37
Clearance Shim
Steel
Steel
5A
Casing Drain Plug
Steel (4)
316 S/S (2)
56
Casing Foot - Optional
Cast Ironl (1)
Cast Iron (1)
5D
Casing Capscrew
Steel (12)
Steel (12)
77
Casing Gasket
Fiber (10)
Fiber (10)
7
Adapter Cradle
Cast Iron (1)
Cast Iron (1)
77A
Gasket - Impeller/Sleeve
Fiber (10)
Fiber (10)
10
Shaft Sleeve
316 S/S (2)
316 S/S (2)
77B
Gasket - Impeller/Washer
Fiber (10)
Fiber (10)
Rubber (7)
10K
Shaft Sleeve Key
Steel (4)
Steel (4)
77C
Gasket - Impeller/Bolt
Teflon (9)
Teflon (9)
12
Impeller Bolt
Steel (12)
316 S/S (2)
95A
Mechanical Seal Stationary
Optional
Optional
12A
Impeller Washer
Steel (4)
316 S/S (2)
95B
Mechical Seal Rotary
Optional
Optional
(1) Cast Iron
(2) AISI 316 S/S
(4) AISI 1020 Steel
(5) Ductile Iron ASTM A395
(7) Buna “N” Rubber
(9) Glass Filled Teflon™ of E. I. DuPont Co.
(10) Aramid Fiber Sheet
(11) 316 S/S - ASTM A744, Grade CF-8M
(12) ASTM A449
STYLE “B”
Specifications are subject to change without notice
12
CLASS 22
Impeller
MATERIAL SPECIFICATION:
STYLE “A”
PART NAME
3
1
TABLE OF CONTENTS
CUSTOMER PLANT MAINTENANCE RECORD
Mechanical Design Specifications
1
DEAN PUMP SERIAL No.
Product Inspection and Test
2
PLANT PROPERTY No.
Product Warranty
2
Warning
2
Receiving Pump
2
Storage
2
Installation
3
SERVICE
LOCATION
Capacity
; T.D.H
; Imp. Dia.
SPARE PARTS IN PLANT STOCK ROOM:
Application and Reapplication
3
Pump Mounting
3
Suction and Discharge Piping
4
Motor Bearing Lubrication
Starting the Pump
4
4-5
Filling
4
Operating
5
Pump Start up Check List
5
Spare Parts
5
Pump Section View, CNV206
6
Parts List, CNV206
6
Pump Section View, CNV236
7
Parts List, CNV236
7
Disassembly and Assembly Procedures
8-10
Disassembly
9
Reassembly
9-10
Typical Mechanical Seals
INTERCHANGEABLE WITH DEAN SERIAL NUMBERS
11-12
13
; Temp.
; RPM
MET-PRO
MET-PRO
Global Pump Solutions
A Met-Pro Fluid Handling Technologies Business
Combining the Resources of Dean Pump, Fybroc & Sethco
Global Pump Solutions
6040 Guion Road • Indianapolis, IN 46254
(317) 293-2930 • FAX: (317) 297-7028
E-mail: [email protected] • Web Site: www.deanpump.com
A Met-Pro Fluid Handling Technologies Business
Combining the Resources of Dean Pump, Fybroc & Sethco
DEAN PUMP® SERIES CNV206/CNV236
Inline Centrifugal Process Pumps
READ WARNINGS
HAZARDOUS SITUATIONS MAY OCCUR UNLESS THIS EQUIPMENT IS APPLIED, INSTALLED, OPERATED, AND MAINTAINED BY THOROUGHLY QUALIFIED PERSONNEL
IN STRICT ACCORDANCE WITH THE INSTRUCTION MANUAL AND ALL APPLICABLE DRAWINGS AND CODES.
Read the instruction manual completely, before installing, filling, operating, or maintaining this equipment.
Obtain, read, and heed the MSDS (Material Safety Data Sheet) for the fluids being handled before attempting to
fill, operate or maintain this equipment.
Stop the pump. Turn off the power supply (electricity, steam, etc.) to the pump driver (motor, turbine, engine, etc.)
and lock the switching device so that it cannot be restarted. Tag the switching device so that no one will attempt to
restart the unit.
Obtain instructions from the Safety Engineer responsible for your facility before performing any work on the pumping equipment and systems.
Close the suction and discharge valves completely to isolate the pump from the system. Lock the valves in the
closed position and tag them so that no one will attempt to open them.
APPLICATION AND REAPPLICATION - At the time of installation, the equipment received should have already
been selected for the service required. You must read the paperwork for the installation and check serial number of
the pump to assure that you are installing the correct pump into the service for which it was selected.
Turn off, lock out, and tag all sub-systems and auxiliary equipment and auxiliary supply lines to isolate the pumping
unit from any and all power, energy, and/or fluids.
Many pumps look identical from the outside but can be made of different materials and/or be constructed differently
inside. Personal injury, death, equipment damage, product (pumpage) damage, and/or product loss could occur if
the incorrect pump is installed.
Do not transfer an existing pump to any other service conditions until you have thoroughly reviewed the pump
construction, materials, sizing, sealing, pressure containing capability, head/capacity capability, and
temperature capability with respect to the required service. Consult your DEAN PUMP sales engineer with all the
service requirements and a full description of the existing pump (including the serial number), seal, and sub-systems
so that we can assist you in a successful reapplication.
INSTALLATION - Always wear the appropriate protective apparel when working on or around the pumping equipment. Safety glasses with side shields, heavy work gloves (use insulated work gloves when handling hot items), steel
toed shoes, hard hat, and any other protective gear as needed for protection. One example of other gear would be
breathing apparatus when working near toxic materials.
Use lifting devices, manufactured expressly for the purpose of lifting, to move the pumping machinery. Do not
attempt to lift the assembly or its components manually. Use only devices with lifting capabilities in excess of the
weight of the unit being lifted. Inspect straps,chains, hooks, etc. for damage and lifting capability before use. Lift
only at the center of gravity.
Personal injury, death, and/or equipment damage could occur if good lifting practices are not used.
Install the equipment on a properly designed and built foundation. Assure that the driver (motor, turbine,or engine)
shaft is properly aligned to the pump shaft.
Connect the suction and discharge piping without forcing the piping into position. The pipe flanges must line up
with the pump flanges “freely”. Strain caused by “forcing” and/or misalignment may cause failure of the pumping
unit, flanges, and/or the piping resulting in fluid (pumpage) release. This could cause personal injury, death
and/or damage to this and/or other equipment.
Install a “new” bolt, of the correct size per ASME/ANSI B16.5 and the correct material per ASME/ANSI B16.5,
in every bolt hole. Tighten all bolts evenly. Use only new uncorroded fasteners.
Improper flange bolting may cause failure of the pumping unit, flanges, piping, and/or fluid (pumpage) release
which could cause personal injury, death, and/or damage to this and/or other equipment.
Connect all other (auxiliary) piping necessary for safe and successful operation of the equipment in the specific service conditions of the application. Make sure that all piping is installed into it’s correct connection. Installation of a
pipe into an incorrect location could result in an explosion and personal injury or death as well as damage to this
and/or other equipment.
Install pressure relief valves in any cavities that could be subjected to pressures in excess of the allowable working
pressure of that cavity. Explosion, personal injury, death, and/or damage to this and/or other equipment may
occur if pressure exceeds allowable.
Recheck the alignment between the driver (motor, turbine, or engine) and pump shafts. Installation of piping may have
forced the pump out of alignment. If so, correct the piping to remove the distorting load.
Check to be certain that the shaft coupling spacer is not installed, and then gently bump the motor starter to check
the rotational direction of the motor. If this is not in the direction of rotation required for the pump, make the necessary corrections.
Lock-out the power to the driver (motor, turbine, engine, etc.)
Install the shaft coupling spacer. Be sure that you install all the retaining devices and bolts and that they are tight.
Read and comply with the coupling manufacturer’s instructions. Personal injury, death, and/or equipment damage
could occur if the coupling spacer is not properly installed. Remove all debris and tools from the area near the
shafts and the shaft coupling. Do this to assure that nothing is caught and thrown by the rotating parts when the
pump is started. Bolt the coupling guard securely to the baseplate, checking to assure that it is not contacting any
parts that will rotate when the pump is started.
FILLING - Before filling the pump with liquid, check to see that all possible leak locations are sealed. See that all of
the connections into the pressure containing cavity are sealed or connected to a related piping system that also has
all possible leak paths sealed. Do not plug unused jacket cavities, as this could develop dangerous pressure buildup. Use a wrench on all bolted joints to apply torque to assure that all gaskets are sealed in a tight joint. Check to
see that all threaded pipe connections are also tight enough to seal the liquid pressure that will be applied when
the system is started.
OPERATING - Before starting the unit, see that all personnel are a safe distance away from all possible hazards,
that all sub-systems are connected and operating, that all debris has been removed, that the shaft coupling guard is
securely in place, and that the pump is full of liquid.
Do not operate this pump at shut-off (no flow) as an explosion may result. This can occur with any liquid, even
“cold water”. Personal injury, death, equipment damage, and/or loss of product (pumpage) is likely to occur. If your
system is operated where it is possible for all outlets for the discharge from the pump to be closed while the pump
is still operating, a modification of the system needs to be made to assure a continual flow of pumpage through the
pump. Note that some people have a belief that a bypass line from the discharge side of the pump to the suction
side of the pump will relieve this problem, this is “NOT TRUE”; DO NOT ATTEMPT THIS.
MAINTENANCE, DISASSEMBLY AND REPAIR - Work must be performed only by thoroughly trained and qualified personnel to assure quality repair and to reduce the possibilities of injury to personnel and/or damage to
equipment. If you do not have personnel who are capable of safe quality repair of this equipment, we advise you
to return the equipment to DEAN PUMP to be repaired.
Do not attempt to perform any work on the unit until you are confident that the pump and its contents have been
stabilized at ambient temperature, and atmospheric pressure.
Put on protective wear to protect human tissue from attack by the fluids contained in the pump and any sub-systems,
and from any vapors or fumes that could possibly be released from these fluids. This could mean breathing apparatus,
face shields, heavy long sleeve rubber gloves, rubber apron, hood, and possibly more, dependent of course on the
properties of the fluids involved and the installed drain and vent piping arrangement. Personal injury and/or death
can occur if adequate precautions are not taken with regard to the fluid, the installation, and the possibilities of the
release of fluid, vapors, and/or fumes.
Remove the coupling guard. Remove the coupling spacer.
Drain all the fluids from the auxiliary sub-systems (lubrication, cooling, heating, seal barrier, etc.) that are connected to the pump. Drain each fluid into a separate container. Use caution required for each fluid after reading the
MSDS (Material Safety Data Sheet) for each.
Flush each sub-system with a compatible, non-toxic, non-hazardous, stable liquid. Drain into individual containers
for each fluid. Disconnect and remove all auxiliary piping.
Carefully bleed off any pressure remaining in the pump. Pressure remaining in the pump will be dependent upon
the pressure in the system when the pump was stopped; the quality, type, and condition of the isolation valves; the
thermal expansion valves of the fluid and the pump material; and the change in the vapor pressure of the fluid
between the temperature at the time the isolation valves were closed and the ambient temperature. Bleeding must
be through a valved drain line piped to a closed container mounted lower than the pump. The container must be
arranged with a relief passage to some point where pressure and fumes will not be harmful to personnel. The
container must also have a level device so that determination can be made that sufficient fluid has been drained to
empty the pump cavity and the volume of fluid that was contained in the run of suction and discharge pipe
between the isolation valves and the pump. After the initial rush of fluid from the pump relieves the pressure, the
drain valve can be opened further to speed the draining operation. When fluid quits running into the drain tank,
gauge the volume to see if it is sufficient to have fully drained the contents of the pump and the suction and discharge pipes between the isolation valves.
If the system was constructed without any drain connections, it will be necessary to consult the designers of the system
for safe draining procedures.
Now drain any small piping, that contains the fluid pumped, from all low points, into the same container used to
drain the pump. Do not drain any other fluids (different than the pumpage) into this container as they may not be
compatible. Personal injury, death, and/or equipment damage could occur.
Even though it might appear that, the cavity being drained has completely drained, be extremely careful about
opening the system and/or opening the pump. If something solid in the pumpage moves to the vicinity of the drain
connection, it could seal-off the drain and maintain pressure in the cavity thought to have been drained. It is also
possible that the isolation valves are not sealing and therefore allowing liquid to flow from the system into the pump.
Personal injury, death, and/or equipment damage may occur if intense caution is not exercised.
Because of the above possibility, when you loosen the gasketed joint at the back of the casing (5), loosen the bolts or
nuts only one full turn, and then use jack screws to break the gasket seal. If fluid and/or pressure remains in the pump,
it will spray out now. Use extreme caution, wearing protective gear, to avoid injury. Do not proceed with disassembly until leakage ceases completely. If leakage does not cease, the isolation valves may not be sealing. Note that if
the pump was purchased with out a drain, the pump will contain fluid which will flow out at the time the bolts are
loosened and the gasket seal is broken.
When you open the pump, the fluid will be exposed to the atmosphere and personnel in the area. For the safety of
all involved, the risk of exposure can be reduced by flushing the cavity that was just drained, with a compatible
non-toxic, non-hazardous, stable liquid, before disassembling the pump.
Remove the casing bolts or nuts and using mechanical lifting apparatus to support the weight, pull the rotating unit
from the casing.
Flush the wetted parts now exposed with compatible, non-toxic, non-hazardous, stable liquid.
Remove the gasket from the face of the casing (5) or the bearing housing (26) dependent on which one the gasket
may have adhered to. The type of gasket and material of construction will vary with service requirements. Attack by
prying and then, if necessary, layering off the old gasket with a sharp scraper, attempting to remove it in the largest
possible pieces. Wear heavy leather, long sleeve work gloves when using the scraper. Wet the gasket before and
during the scraping operation to reduce the possibility of fibers becoming airborne. Wear a respirator during this
operation and until all debris has been disposed of in a plastic bag. Remove all of the gasket material down to clean
metal surfaces on both parts that contacted the gasket. Place all of the gasket residue in a plastic bag, seal the bag
and dispose of it in compliance with all government requirements.
The rotating assembly of the pump can now be moved to a more convenient location for further disassembly. Use
only high quality tools. Flush parts as disassembled to removed hazardous residue from the pumpage and/or
sub-system fluids.
Wear protective equipment as advised at the beginning of these warnings.
Use mechanical lifting equipment to lift assemblies and components.
Do not apply heat to parts to assist in disassembly. Explosion could occur causing personal injury, death, and/or
damage to equipment.
Do not attempt to drill, saw, or otherwise cut parts to remove them. Explosion and/or fuming could occur causing
personal injury, death, and/or equipment damage.
Do not hammer on any parts. Personal injury and/or damage to equipment may occur.
When it is necessary to open the pump and/or the pumping system, the fluid will be exposed to the atmosphere
and personnel in the area. For the safety of all involved, the risk of exposure of personnel to the hazards of the
pumpage can be reduced by flushing the entire system with a compatible non-toxic, non-hazardous,stable liquid
before opening the pump or the system. In all cases, where the system is flushed or not, use the utmost care around
the pumpage and the pumping system.
Do not attempt to manufacture parts or modify Dean Pump parts in any manner. Death, personal injury, and/or
damage to equipment may occur.
Always wear the appropriate protective apparel when working on or around the pumping equipment. Safety
glasses with side shields, heavy work gloves (use insulated work gloves when handling hot items), steel-toed shoes,
hard hat, and any other protective gear as needed for protection. One example of other gear would be breathing
apparatus when working near toxic materials.
Replace all gaskets, seals, bearings, and lubricants. Replace all parts that have worn, corroded, eroded, or otherwise deteriorated.
One example of the above would be overboring the seal chamber, which removes metal that is required to contain fluids. Removal of this metal reduces the pressure containing capability of the part, and may create a leak path
through the part.
DO NOT INSTALL, OPERATE, OR SERVICE THIS PUMP
Use only Dean Pump Division of Met-Pro Corporation parts.
Use only top quality tools.
BEFORE READING THE ENTIRE MANUAL
©COPYRIGHT 2012 MET-PRO CORPORATION, DEAN PUMP
DEAN PUMP ® IS A REGISTERED TRADEMARK OF MET-PRO CORPORATION.
09-5947 512
Instruction Manual MC 1.2.35
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