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INSTALLATION, OPERATION
AND MAINTENANCE MANUAL
WITH PARTS LIST
LP
SERIES PUMP
MODEL
LP - 12
Thomas Pump & Machinery
120 Industrial Drive
Slidell, LA 70460
PH: 985-649-3000
Fax: 985-649-4300
TABLE OF CONTENTS
INTRODUCTION........................................................................................... Pg.
WARNING – SECTION A ............................................................................ Pg. 04
INSTALLATION – SECTION B.................................................................... Pg.
05
PREINSTALLATION INSPECTION................................................. Pg.
Mounting..................................................................................... Pg.
Clearance................................................................................... Pg.
SUCTION AND DISCHARGE PIPING.............................................
06
06
Pg. 06
Line
Gauges....................................................................................... Pg.
SUCTION
07
07
Sealing....................................................................................... Pg.
Valves......................................................................................... Pg.
Lines.............................................................................. Pg.
AUTOMATIC AIR RELEASE VALVE...............................................
08
09
Pg. 10
10
11
Drivers.......................................................................... Pg.
V-Belt
OPERATION – SECTION C
.........................................................................
14
14
STARTING....................................................................................... Pg.
14
15
Liquids Temperature and Overheating....................................... Pg.
Strainer 16
16
STOPPING....................................................................................... Pg.
BEARING TEMPERATURE CHECK............................................... Pg. 16
1
TABLE OF CONTENTS
(Continued)
TROUBLESHOOTING – SECTION D ………………………............
Pg. 18
PUMP MAINTENANCE AND REPAIR – SECTION E………..........
Pg. 21
PERFORMANCE Pg. 21
26
Impeller Shaft and Bearing Disassembly .......……………......... Pg.
Impeller Shaft and Bearing Reassembly ……….........….......... Pg. 27
LUBRIFICATION ............................................................................
Bearings
Pg. 30
Seal Assembly ......................................................................... Pg.
30
2
INTRODUCTION
This Installation, Operation, and
Maintenance manual is designed to help you get the best performance and longest life from your E sco pump.
This pump is a n LP Series, semi-open impeller, self- priming centrifugal model with a suction check valve. The pump is designed for handling mild industrial corrosives, mud or slurries containing large entrained solids. The basic material of construction is gray iron, with ductile iron impeller and steel wearing parts.
If there are any questions regarding the pump or its applications which are not covered in this manual or in other literature accompanying this unit, please contact your Bombas Esco S/A distributor, or write:
Thomas Pump & Machinery
120 Industrial Drive
Slidell, LA 70460
Ph: 985-649-3000
Fax: 985-649-4300
For information or technical assistance on the power source, contact the power source manufacture’s local dealer or representative.
The following are used to alert maintenance personnel to procedures which require special attention, to those which could damage equipment, and to those which could be dangerous to personnel:
DANGER!
Immediate hazards which WILL result in severe personal injury or death. These instructions describe the procedure required and the injury which will result from failure to follow procedure.
CAUTION!
Hazards or unsafe practices which COULD result in minor personal injury or product or property damage. These instructions describe the requirements and the possible damage which could result from failure to follow the procedure .
NOTE
Instructions to aid in installation, operation, and maintenance or which clarify a procedure.
3
SAFETY – SECTION A
These warnings apply to LP series basic pumps.
Bombas Esco has no control over or particular knowledge of the power source which will be used. Refer to the manual accompanying the power source before attempting to begin operation.
WARNING!
After the pump has been positioned, make certain that the pump and all piping connections are tight, properly supported and secure before operation.
WARNING!
Before attempting to open or service the
:
1. Familiarize yourself with this manual.
2. Disconnect or lock out the power source to ensure that the pump will remain inoperative.
3. Allow the pump to cool if overheated.
WARNING!
Do not operate the pump without the guards in place over the rotating parts.
Exposed rotating parts can catch clothing, fingers, or tools, causing severe injury to personnel.
WARNING!
Do not remove plates, covers, gauges, pipe plugs, or fittings from an overheated pump.
Vapor pressure within the pump can cause parts being disengaged to be ejected with great force.
4. Check the temperature before opening any covers, plates, or plugs.
5. Close the suction and discharge valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump
Allow the pump to cool before servicing.
WARNING!
Do not operate the pump against a closed discharge valve for long periods of time. If operated against a closed discharge valve, pump components will deteriorate, and the liquid could come to a boil, pressure, and cause the pump casing to rupture or explode .
WARNING!
WARNING!
This pump is designed to handle mild industrial corrosives, mud or slurries containing large entrained solids. Do not attempt to pump volatile, corrosive, or flammable materials wihch may damage the pump or endanger personnel as result of pump failure.
Use lifting and moving equipment in good repair and with adequate capacity to prevent injuries to personnel or damage to equipment. Suction and discharge hoses and piping must be removed form the before lifting
4
INSTALLATION – SECTION B
Review all SAFETY information in Section A. Since the pressure supplied to the pump is critical to
Since pump installations are seldom identical, this section offers only general recommendations and practices required to inspect, position and arrange the pump and piping.
Most of the information pertains to a standard static lift application where the pump is positioned above the level of liquid to be pumped.
If installed in a flooded suction application where the liquid is supplied to the pump under pressure, some of the information such as mounting, line configuration, and priming must be tailored to the specific application. performance and safety, be sure to limit incoming pressure to 50% of the maximum p ermissible operating pressure as shown on the pump performance curve.
For further assistance, contact your Bombas Esco distributor or the Bombas Esco Company.
Pump Dimensions
See Figure 1 for the approximate physical dimensions of this pump.
OUTLINE DRAWING
DIMENSIONS: MI L LIMETERS
(INCHES)
101.60
[4.00]
509.75
[20.00]
1621.50
[63.84]
95.30
[3.75]
174.80
[6.88]
270.10
[10.63]
650.00
[25.59]
203.20
[8.00]
167.90
[6.59]
272.00
[10.71]
9.6 x 4.8 x 127.0
[.38] [.19]
160.80
[6.31]
[5.00]
Figure 1. Pump Model
LP
-12
121.40
[4.78]
203.20
[8.00]
345.90
[13.62]
508.00
[32.00]
466.90
[18.38]
121.40
[4.78]
203.20
[8.00]
5
PREINSTALLATION INSPECTION POSITIONING PUMP
The pump assembly was inspected and tested before from the factory. Before installation, inspect the pump for damage which may have occurred during shipment. Check as follows: a. inspect the pump for cracks, dents, damaged threads, and other obvious damage. b. Check for and tighten loose attaching hardware. Since gaskets tend to shrink after drying, check for loose hardware at mating surfaces. c. Carefully read all warnings and cautions contained in this manual or affixed to the pump, and perform all duties indicated.
Note the direction of rotation indicated on the pump. Check that the pump shaft rotates counterclockwise when facing the back cover plate assembly/impeller end of the pump.
CAUTION!
Only operate this pump in the direction indicate by the arrow on the pump body and on the accompanying decal. Refer to
ROTATION in OPERATION, Section C. d. Check levels and lubricate as necessary. Refer to LUBRICATION in the
MAINTENANCE AND REPAIR section of this manual and perform duties as instructed. e. If the pump and power source have been stored for more than 12 months, some of the components or lubricants may have exceeded their maximum shelf life.
These must be inspected or replaced to ensure maximum pump service.
If the maximum shelf life has been exceeded, or if anything appears to be abnormal, contact your Bombas Esco distributor or the factory to determine the repair or updating policy. Do not put the pump into service until appropriate action has been taken.
Lifting
Use lifting equipment with a capacity of at least
13.230 pounds (6000 Kg) . This pump weighs approximately 2350 pounds (1066 Kg), not including the weight of accessories and base.
Customer installed equipment such as suction and discharge piping must be removed before attempting to lift.
CAUTION!
The pump assembly can be seriously damaged if the cables or chains used to lift and move the unit are improperly wrapped around the pump.
Mounting
Locate the pump in an accessible place as close as practical to the liquid being pumped. Level mounting is essential for proper operation.
The pump may have to be supported or shimmed to provide for level operation or to eliminate vibration.
Clearance
When positioning the pump, allow a minimum clearance of 40 inches (800 mm) in front of the back cover to permit removal of the cover and easy access to the pump interior.
SUCTION AND DISCHARGE PIPING
Pump performance is adversely effected by increase suction lift, discharge elevation. And friction losses. See the performance curve and operating range shown on Page 21 to be sure your overall application allows pump to operate within the safe operation range.
Materials
Either pipe or hose maybe used for suction and discharge lines: however, the materials must be compatible with liquid being pumped.
6
If hose is used In suction lines, it must be the rigid-wall, reinforced type to prevent collapse under suction. Using piping couplings in suction lines is not recommended.
Line Configuration
Keep suction and discharge lines as straight as possible to minimize friction losses. Make minimum use of elbows and fittings, which substantially increase friction loss. If elbows are necessary, use the long radius type to minimize friction loss.
Connections to Pump
Before tightening a connecting flange, align it exactly with the pump port. Never pull a pipe line into place by tightening the flange bolts and/or couplings.
Lines near the pump must be independently supported to avoid strain on the pump which could cause excessive vibration, decrease bearing life, and increased shaft and seal wear.
If hose-type lines are used, they should have adequate support to secure them when filled with liquid and under pressure.
Fittings
Suction lines should be the same size as the pump inlet. If reducers are used in suction lines, they should be the eccentric type, and should be installed with the flat part of the reducers uppermost to avoid creating air pockets. Valves are not normally used in suction lines, but if a valve is used, install it with the horizontal to avoid air pockets.
Strainers
If a strainer is furnished with the pump, be certain to use it; any spherical solids which pass through a strainer furnished with the pump will also pass through the pump itself.
If a strainer is not furnished with the pump, but is installed by the pump user, make certain that the total area of the openings in the strainer is at least three or four times the cross section of the suction line, and that the openings will not permit passage of solids larger than the solids handling capability of the pump.
This pump is designed to handle up to 3 inch (76,2 mm) diameter spherical solids.
Gauges
Most pumps are drilled and tapped for installing discharge pressure and vacuum suction gauges.
If these gauges are desired for pumps that are not tapped, drill and tap the suction and discharge lines not less than 18 inches
(457,2mm) from the suction and discharge ports and install the lines. Installation closer to the pump may result in erratic readings.
SUCTION LINES
To avoid air pockets which could affect pump priming, the suction line must be as short and direct as possible. When operation involves a suction lift, the line must always slope upward to the pump from the source of the liquid being pumped: if the line slopes down to the pump at any point along the suction run, air pockets will be created.
Sealing
Since even a slight leak will affect priming, head, and capacity, especially when operating with a high suction lift, all connections in the suction line should be sealed with pipe dope to ensure an airtight seal.
Follow the sealant manufacturer’s recommendations when selecting and applying the pipe dope. The pipe dope should be compatible with the liquid being pumped.
Suction Lines in Sumps
If a single suction line is installed in a sump, it should be positioned away from the wall of the sump at a distance equal to 1 ½ times the diameter of the suction line.
If there is a liquid flow from an open pipe into the sump, the flow should be kept away from the suction inlet because the inflow will carry air down into the sump, and air entering the suction line will reduce pump efficiency.
7
If it is necessary to position inflow close to the suction inlet, install a baffle between the inflow and the in suction lines, it must be the rigid-wall, reinforced type to prevent collapse under suction. Using piping couplings in suction lines is not recommended.
Suction inlet at a distance 1 ½ times the diameter of the suction pipe. The baffle will allow entrained air to escape from the liquid before it is drawn into the suction inlet.
If two suction lines are installed a single sump, the flow paths may interact, reducing the efficiency of one or both pumps. To avoid this, position the suction inlets so that they are separated by a distance equal to at least 3 times the diameter of the suction pipe.
Suction Line Positioning
The depth of submergence of the suction line is critical to efficient pump operation. Figure 2 shows
Recommended minimum submergence vs. velocity.
NOTE
The pipe submergence required may be reduced by installing a standard pipe increaser fitting at the end of the suction line. The larger opening size will reduce the inlet velocity. Calculate the required submergence using the following formula based on the increased opening size
(area or diameter).
VELOCITY (FT./SEC.)= QUANT. (G.P.M)x.321 OR G.P.M. x 4085
AREA D²
VELOCITY (M./SEC.)= FLOW (M./MIN)x21.22 OR FLOW (M³/SEC.)
DIAMETER IN MM² AREA IN M²
Figure 2. Recommended Minimum Suction Line Submergence vs. Velocity
DISCHARGE LINES
Siphoning
Do not terminate the discharge line at a level lower than of the liquid being pumped unless a siphon breaker is used in the line. Otherwise, a siphoning action causing damage to the pump could result.
Valves
If a throttling valve is desired in the discharge line, use a valve as large as the largest pipe to minimize friction losses. Never install a throttling valve in a suction line.
With high discharge heads, it is recommended that a throttling valve and a system check valve be installed in the discharge line to protect the pump from excessive shock pressure and reverse rotation when it is stopped.
8
CAUTION!
If the application involves a high discharge head, gradually close the discharge throttling valve before stopping the pump.
Bypass Lines
Self-priming pumps are not air compressors. During the priming cycle, air from the suction line must be vented to atmosphere on the discharge side. If the discharge line is open, this air a check valve has been installed in the discharge line, the discharge side of the pump must be opened to atmospheric pressure through a bypass line installed between the pump discharge an the check valve. A selfpriming centrifugal pump will not prime if there is sufficient static liquid head to hold the discharge check valve closed.
NOTE
The bypass line should be sized so that it does not affect pump discharge capacity; however, the bypass line should be at least 1 inch in diameter to minimize the chance of plugging.
In low discharge head applications (less than 30 feet or 9 meters), it is recommended that the bypass line be run back to the wet well, and locate 6 inches below the water level or cut-off point of the level pump. In some installations, this bypass line may be terminated with a six-to-eight foot length of 1 ¼ inch
ID. smooth-bore hose; air and liquid vented during the priming process will then agitate the hose and break up any solids, grease, or other substances likely to cause clogging.
A bypass line that is returned to a wet well must be secured against being drawn into the pump suction inlet.
It is also recommended that pipe unions be installed at each 90º elbow in a bypass line to ease disassembly and maintenance.
CAUTION!
In high discharge head applications (more than
30 feet), an excessive amount of liquid may be bypassed and forced back to the wet well under the full working pressure of the pump; this will reduce overall pumping efficiency. Therefore, it is recommended that a Bombas Esco Automatic
Air Release Valve be installed in the bypass line .
Bombas Esco Automatic Air Release Valves are reliable, and require minimum maintenance. See
AUTOMATIC AIR RELEASE VALVE in this section for installation and theory of operation of the Automatic Air Release Valve. Contact the
Bombas Esco Company for selection of an
Automatic Air Release Valve to fit your application.
If the installation involves a flooded suction such as below-ground lift station. A pipe union and manual shut-off valve may be installed in the bleed line to allow service of the valve without shutting down the station, and to eliminate the possibility of flooding.
If a manual shut-off valve is installed anywhere in the air release piping, it must be a full-opening ball type valve to prevent plugging by solids.
DANGER!
If a manual shut-off valve is installed in a bypass line, it must not be left closed during operation. A closed manual shut-off valve may cause a pump which has lost prime to continue to operate without reaching prime, causing dangerous overheating and possible explosive rupture of the pump casing. Personnel could be severely injured.
Allow an over-heated pump to cool before servicing. Do not remove plates, covers, gauges, or fittings from an overheated pump.
Liquid within the pump can reach boiling temperatures, and vapor pressure within the pump can cause parts being disengaged to be ejected with great force. After the pump cools, drain the liquid from the pump by removing the casing drain plug. Use caution when removing the plug to prevent injury to personnel from hot liquid.
9
AUTOMATIC AIR RELEASE VALVE
When properly installed and correctly adjusted to the specific hydraulic operating conditions of the application, the Bombas Esco Automatic Air Release
Valve will permit air to escape through the bypass line, and then close automatically when the pump is fully primed and pumping at full capacity.
Theory of Operation
Figures 3 and 4 show a cross-sectional view of the
Automatic Air Release Valve, and a corresponding description of operation.
Figure 3. Valve in Open Position
During the priming cycle, air from the pump casing flows through the bypass line, and passes through the
Air Release valve to the wet well (Figure 3).
Figure 4. Valve in Closed Position
When the pump is fully primed, pressure resulting from flow against the valve diaphragm compresses the spring and closes the valve (Figure 4).
The valve will remain closed, reducing the bypass of liquid to 1 to 5 gallons (3.8 to 19 liters) per minute, until the pump loses its prime or stops.
WARNING!
Some leakage (1 to 5 gallons [3.8 to 19 liters] per minute) will occur when the valve is fully closed.
Be sure the bypass line is directed back to the wet well or tank to prevent hazardous spills.
When the pump shuts down, the spring returns the diaphragm to its original position. Any solids that may have accumulated in the diaphragm chamber settle to the bottom and are flushed out during the next priming cycle.
NOTE
The valve will remain open if the pump does not reach its designed capacity or head. Valve closing pressure is dependent upon the discharge head of the pump at full capacity. The range of the valve closing pressure is established by the tension rate of the spring as ordered from the factory. Valve closing pressure can be further adjusted to the exact system requirements by moving the spring retaining pin up or down the plunger rod to increase or decrease tension on the spring. Contact your
Bombas Esco distributor or Bombas Esco
Company for information about an Automatic Air
Release Valve for your specific application.
Air Release Valve installation
The Automatic Air Release Valve must be independently mounted in a horizontal position and connected to the discharge line of the self-priming centrifugal pump (see Figure 5).
NOTE
If the Air Release Valve is to be installed on a staged pump application, contact the factory for specific installation instructions.
10
INSTALL AIR RELEASE VALVE
IN HORIZONTAL POSITION
90 LONG
RADIUS
°
ELBOW
BLEED LINE 1"
(25,4MM) DIA. MIN.
(CUSTOMER
FURNISHED)
EXTEND 6"
(152,4MM)
BELOW LIQUID
LEVEL SURFACE
SUPPORT
BRACKET
CLEAN-OUT
COVER
SUCTION
LINE
DISCHARGE PIPE
DISCHARGE PIPE
SELF-PRINING
CENTRIFUGAL
PUMP
DRAIN LINE
WET WELL OR SUMP
Figure 5. Typical Automatic Air Release Valve Installation
The valve inlet must be installed between the pump discharge port and the non-pressurized side of the discharge check valve. The valve inlet is it at the large end of the valve body, and is provided with standard 1-inch NPT pipe threads.
The valve outlet is located at the opposite end of the valve, and is also equipped with standard 1-inch NPT pipe threads. The outlet should be connected to a bleed line which slopes back to the wet well or sump.
The bleed line must be the same size as the inlet piping, or larger. If piping is used for the bleed line, avoid the use of elbows whenever possible.
NOTE
It is recommended that each Air Release Valve be fitted with an independent bleeder line directed back to the wet well. However, if multiple air
Release Valves are installed in a system, the bleeder lines may be directed to a common manifold pipe. Contact your Bombas Esco distributor or the Bombas Esco company for information about installation of an Automatic Air
Release Valve for your specific application.
ALIGNMENT
The alignment of the pump and its power source is critical for trouble-free mechanical operation. In either a flexible coupling or V-belt driven system, the driver and pump must be mounted so that their shafts are aligned with and parallel to each other. It is imperative that alignment be checked after the pump and piping are installed, and before operation.
NOTE
Check Rotation , Section C, before alignment of the pump.
When mounted at the Bombas Esco factory, driver and pump are aligned before shipment.
Misalignment will occur in transit and handling.
Pumps must be checking alignment, tighten the foundation bolts. The pump casing feet and/or pedestal feet, and the driver mounting bolts should also be tightly secured.
11
WARNING!
When checking alignment, disconnect the power source to ensure that the pump will remain inoperative.
CAUTION!
Adjusting the alignment in one direction may alter the alignment in another direction. Check each procedure after altering alignment.
Coupled Drives
When using couplings, the axis of the power source must be aligned the axis of the pump shaft in both the horizontal and vertical planes. Most couplings require a specific gap or clearance between the driving and the driven shafts. Refer to the coupling manufacturer’s service literature.
Align spider insert type couplings by using calipers to measure the dimensions on the circumference of the outer ends of the coupling hub every 90 degrees. The coupling is in alignment when the hub ends are the same distance apart at all points (see
Figure 6A).
F
Figure 6A. Aligning Spider – Type Couplings
Figure 6B. Aligning Non-Spider Type Couplings
Align non-spider type couplings by using a feeler gauge or taper gauge between the coupling halves every 90 degrees. The coupling is in alignment when the hubs are the same distance apart at all points
(see Figure 6B).
Check parallel adjustment by laying a straightedge across both coupling rims at the top, bottom, and side. When the straightedge rests evenly on both halves of the coupling, the coupling is in horizontal parallel alignment. If the coupling is misaligned use a feeler gauge between the coupling and the straightedge to measure the amount of misalignment.
V-Belt Drives
When using V-belt drives, the power source and the pump must be parallel. Use a straightedge along the sides of the pulleys to ensure that the pulleys are properly aligned (see Figure 6C). In drive systems using two pr more belts, make certain that the belts are a matched set; unmatched sets will cause accelerated belt wear.
12
MISALIGNED: SHAFTS MISALIGNED: SHAFTS ALIGNED: SHAFTS PARALLEL
NOT PARALLEL NOT IN LINE AND SHEAVES IN LINE
Figure 6C. Alignment of V-Belt Driven Pumps
Tighten the belts in accordance with the belt manufacturer’s instructions. If the belts are too loose, they will slip; if the belts are too tight, there will be excessive power loss and possible bearing failure.
Select pulleys that will match the proper speed ratio; over speeding the pump may damage both pump and power source.
DANGER!
Do not operate the pump without the guard in place over the rotating parts. Exposed rotating parts can catch clothing, fingers, or tools, causing severe injury to personnel.
F
13
OPERATION – SECTION C
Review all SAFETY information in Section A.
Follow instructions on all tags, labels and decals attached to the pump.
WARNING!
This pump is designed to handle mild industrial corrosives, mud or slurries containing large entrained solids. Do not attempt to pump volatile; corrosive, or flammable liquids which may damage the pump or endanger personnel as a result of pump failure.
CAUTION!
Pump speed and operating conditions must be within the performance range shown on page
21 .
PRIMING
Install the pump and piping as describe in
INSTALLATION . Make sure that the piping connections are tight, and that the pump is securely mounted. Check that the pump is properly lubricated (see LUBRICATION in
MAINTENANCE AND REPAIR ).
This pump is self-priming, but the pump should never be operated unless there is liquid in the pump casing.
CAUTION!
Never operate this pump unless there is liquid in the pump casing. The pump will not prime when dry. Extend operation of a dry pump will destroy the seal assembly.
Add liquid to the pump casing when:
1. The pump is being put into service for the first time.
2. The pump has not been used for a considerable length of time.
3. The liquid in the pump casing has evaporated.
Once the pump casing has been filled, the pump will prime and reprime as necessary.
WARNING!
After filling the pump casing, reinstall and tighten the fill plug. Do not attempt to operate the pump unless all connecting piping is securely installed. Otherwise, liquid in the pump forced out under pressure could cause injury to personnel.
To fill the pump, remove the pump casing fill cover or fill plug in the top of the casing, and add clean liquid until the casing is filled. Replace the fill cover or fill plug before operating the pump.
STARTING
Consult the operations manual furnished with the power source.
Rotation
The correct direction of pump rotation is counterclockwise when facing the impeller. The pump could be damaged and performance adversely affected by incorrect rotation. If pump performance is not within the specified limits (see the curve on page 21), check the direction of power source rotation before further troubleshooting.
If an electric motor is used to drive the pump, remove V-belts, couplings, or otherwise disconnect the pump from the motor before checking motor rotation. Operate the motor independently while observing the direction of the motor shaft, or cooling fan.
14
If rotation is incorrect on a three-phase motor, have a qualified electrician interchange any of the
Phase wires to change direction. If rotation is incorrect on a single-phase motor, consult the literature supplied with the motor for specific instructions.
OPERATION
Lines With a Bypass
If a Bombas Esco Automatic Air Release Valve has been installed, the valve will automatically open to allow the pump to prime, and automatically close after priming is complete (see
INSTALLATION for Air Release Valve operation.
Lines Without a Bypass
Open all valves in the discharge line and start the power source. Priming is indicated by a positive reading on the o the discharge pressure gauge or by a quieter operation. The pump may not prime immediately because the suction line must first fill with liquid. If the pump fails to prime within five minutes, stop it and check the suction line for leaks.
After the pump has been primed, partially close the discharge line throttling valve in order to fill the line slowly and guard against excessive shock pressure which could damage pipe ends, gaskets, sprinkler heads, and any other fixtures connected to the line. When the discharge line is completely filled, adjust the throttling valve to the required flow rate.
WARNING!
Do not operate the pump against a closed discharge throttling valve for long periods of time. If operated against a closed discharge throttling valve, pump components will deteriorate, and the liquid could come to a boil, build pressure, and cause the pump casing to rupture or explode.
Leakage
No leakage should be visible at pump mating surfaces, or at pump connections or fittings. Keep all line connections and fittings tight to maintain maximum pump efficiency.
Liquid Temperature And Overheating
The maximum liquid temperature for this pump is
160º F (71º C). Do not apply it at a higher operating temperature.
Overheating can occur if operated with the valves in the suction or discharge lines closed. Operating against closed valves could bring the liquid to a boil, build pressure, and cause the pump to rupture or explode. If overheating occurs, stop the pump and allow it to cool before servicing it. Refill the pump casing with cool liquid.
DANGER!
Allow an over-heath pump to cool before servicing. Do not remove plates, covers, gauges, or fittings from an overheated pump.
Liquid within the pump can reach boiling temperatures, and vapor pressure within the pump can cause parts being disengaged to be ejected, with great force. After the pump cools, drain the liquid from the pump by removing the casing drain plug. Use caution when removing the plug to prevent injury to personnel from hot liquid.
As safeguard against rupture or explosion due to heat, this pump is equipped with a pressure relief valve which will open if vapor pressure within the pump casing reaches a critical point. If overheating does occur, stop the pump immediately and allow it to cool before servicing it. Approach any overheated pump cautiously. It is recommended that the pressure relief valve assembly be replaced at each overhaul, or any time the pump casing overheats and activates the valve. Never replace this valve with a substitute which has not been specified or provided by the Bombas Esco
Company.
15
Strainer Check
If s suction strainer has been shipped with the pump or installed by the user, check the strainer regularly, and clean it as necessary. The strainer should also be checked if pump flow rate begins to drop. If a vacuum suction gauge has been installed, monitor and record the readings regularly to detect strainer blockage.
Never introduce air or steam pressure into the pump casing or piping to remove a blockage. This could result in personal injury or damage to the equipment. If back flushing is absolutely necessary, liquid pressure must be limited to 50% of the maximum permissible operating pressure show on the pump performance curve.
Pump Vacuum Check
With the pump inoperative, install a vacuum gauge in the system, using pipe dope on the threads. Block the suction line and start the pump.
At operating speed the pump should pull a vacuum of 20 inches (508,0mm) or more of mercury. If it does not, check for air leaks in the seal, gasket, or discharge valve.
Open the suction line, and read the vacuum gauge with the pump primed and at operation speed. Shut off the pump. The vacuum gauge reading will immediately drop proportionate to static suction lift, and should then stabilize. If the vacuum reading falls off rapidly after stabilization, an air leak exists. Before checking for the source of the leak, check the point of installation of the vacuum gauge.
STOPPING
Never halt the flow of liquid suddenly. If the liquid being pumped is stopped abruptly, damaging shock waves can be transmitted to the pump and piping system. Close all connecting valves slowly.
On engine driven pumps, reduce the throttle speed slowly and allow the engine to idle briefly before stopping.
CAUTION!
If the application involves a high discharge head, gradually close the discharge throttling valve before stopping the pump.
After stopping the pump, lock out or disconnect the power source to ensure that the pump will remain inoperative.
WARNING!
Do not operate the pump against a closed discharge throttling valve for long periods of time. If operated against a closed discharge throttling valve, pump components will deteriorate, and the liquid could come to a boil, build pressure, and cause the pump casing to rupture or explode.
Cold Weather Preservation
In below freezing conditions, drain the pump to prevent damage from freezing. Also, clean out any solids by flushing with a hose. Operate the pump for approximately one minute; this will remove any remaining liquid that could freeze the pump rotating parts. If the pump will be idle for more than a few hours, or if it has been pumping liquids containing a large amount of solids, drain the pump, and flush it thoroughly with clean water. To prevent large solids from clogging the drain port and preventing the pump from completely draining, insert a rod or stiff wire in the drain port, and agitate the liquid during the draining process.
Clean out any remaining solids by flushing with a hose.
BEARING TEMPERATURE CHECK
Bearings normally run at higher than ambient temperatures because of heat generated by friction. Temperatures up to 160º F(71º C) are considered normal for bearings, and they can operate safely to at least 180º F(82º C).
16
Checking bearing temperatures by hand is inaccurate. Bearing temperatures can be measured accurately by placing a contact-type
Thermometer against the housing. Record this temperature for future reference.
A sudden increase in bearing temperature is a warning that the bearings are at the point of failing to operate properly. Make certain that the bearing lubricant is of the proper viscosity and at the correct level (see LUBRICATION in
MAINTENANCE AND REPAIR).
Bearing overheating can also be caused by shaft misalignment and/or excessive vibration.
When pumps are first started, the bearings may seem to run at temperatures above normal.
Continued operation should bring the temperatures down to normal levels.
17
TROUBLESHOOTING - SECTION D
TROUBLE
PUMP FAILS
TO PRIME
Review all SAFETY information in Section A.
WARNING!
Before attempting to open or service the pump :
1. Familiarize yourself with this manual.
2. Lock out or disconnect the power source to ensure that the pump will remain inoperative.
3. Allow the pump to cool if overheated.
4. Check the temperature before opening any covers, plates, or plugs.
5. Close the suction and discharge valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump.
POSSIBLE CAUSE
Not enough liquid in casing.
Suction check valve contaminated or damaged.
Air leak in suction line.
Lining of suction hose collapsed.
Leaking or worn seal or pump gasket.
Suction lift or discharge head too high.
Strainer clogged.
PROBABLE REMEDY
Add liquid to casing. See PRIMING.
Clean or replace check valve.
Correct leak.
Replace suction Hose.
Check pump vacuum. Replace leaking
Or worn seal or gasket.
Check piping installation and install bypass line if needed. See INSTALLATION.
Check strainer and clean if necessary.
18
TROUBLE
PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE
PUMP REQUIRES
TOO MUCH POWER
PUMP CLOGS
FREQUENTLY
POSSIBLE CAUSE
Air leak in suction line.
Lining of suction hose collapsed.
Leaking or worn seal or pump gasket.
Strainer clogged.
Suction intake not submerged at proper level or sump too small.
Impeller or other wearing parts worn or damaged.
Impeller clogged.
Pump speed too slow.
Discharge head too high.
Suction lift too high.
Pump speed too high
Discharge head too low.
Liquid solution too thick.
Bearing(s) frozen.
Liquid solution too thick.
Discharge flow too slow.
Suction check valve or foot valve
Clogged or binding.
PROBABLE REMEDY
Correct leak.
Replace suction hose.
Check pump vacuum. Replace leaking or worn seal or gasket.
Check strainer and clean if necessary.
Check installation and correct submergence as needed.
Replace worn or damaged parts. Check that impeller is properly centered and rotates.
Free impeller of debris.
Check driver output; check belts or couplings for slippage.
Install bypass line.
Measure lift w/vacuum gauge. Reduce lift and/or friction losses in suction line.
Check driver output; check that sheaves or motor rpm are correctly sized.
Adjust discharge valve.
Dilute if possible.
Disassemble pump and check bearing(s).
Dilute if possible.
Open discharge valve fully to increase flow rate, and run power source at maximum governed speed.
Clean valve.
19
TROUBLE POSSIBLE CAUSE
EXCESSIVE NOISE Cavitation in pump.
Pumping entrained air.
Pump or drive not securely mounted.
Impeller clogged or damaged.
BEARINGS RUN
TOO HOT
Bearing temperature is high, but within limits.
Low or incorrect lubricant.
Suction and discharge lines not properly
Supported.
Drive misaligned.
PROBABLE REMEDY
Reduce suction lift and/or friction losses in suction line. Record vacuum and pressure gauge readings and consult local representative or factory.
Locate and eliminate source of air bubble.
Secure mounting hardware.
Clean out debris; replace damaged parts.
Check bearing temperature regularly to
Monitor any increase.
Check for proper type and level of lubricant.
Check piping installation for proper support.
Align drive properly.
20
PUMP MAINTENANCE AND REPAIR – SECTION E
MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK
OPERATING PERFORMANCE.
STANDARD PERFORMANCE FOR PUMP MODEL
LP
- 12
SERIES :
PERFORMANCE CURVE
ESCO
12"x12"
1150
1050
950
40%50 60
70
MODEL
OP
RA
ERA
79
E
TING
79
LP
-12
850
70%
750
650
NPSH @ 1250 RPM
20 25
40
30
50
60
75
Based on 70º F(21º C) clear water at sea level with minimum suction lift. Since pump installations are seldom identical, your performance may be difference due to such factors as viscosity, specific gravity, elevation, temperature, and impeller trim.
10
0
12
5 B
HP
BOMBAS ESCO SA
CAUTION!
Pump speed and operating condition points must be within the continuous performance range shown on the curve.
21
PARTS LIST
Pump Model
LP
-12
ITEM NO.
01 PUMP CASING
02 *
03 * SEAL ASSY
05 ACCESS COVER ASSY
06 *
07 COVER CLAMP
08
09
10
11
*
*
CLAMP BAR SCREW
WEAR PLT ADJ SCREW
WEAR PLT JAM NUT
12
13 HEX HD CAPSCREW
15 HEX NUT
16
17
18 *
ACCESSORY PLUG
OIL SEAL
19 * DISCH FLANGE GSKT
20
21 * WEAR PLT O-RING
22 *
23 HEX HD CAPSCREW
34
35
36
37
38
39
25 * SEAL CAVITY VENT
26 *
27 * WAVE WASHER
28 *
29 * SHAFT KEY
30 *
31 BEARING CAP
32 *
33 * BRG CAP O-RING
HEX HD CAPSCREW
LOCKWASHER
OIL SIGHT GAUGE
PIPE PLUG
PED DRAIN PLUG
BEARING HOUSE
41 HEX HD CAPSCREW
42
43 * PEDESTAL O-RING
PART NAME
45 CASING DRAIN PLUG
46
47 STUD
48
49 HEX NUT
50
* INDICATES PARTS RECOMMENDED FOR STOCK
QTY
01
PART NUMBER
9600154000
01 9600497000
01 9800911000
01 9700777000
01 9700498000
01 9901378000
02 9901379000
04 2102565120
02
04
04
9901380000
9901381000
2211270050
01 3310271020
12 2101266480
12 2321081540
12 2211270090
01 9700499000
01
01
3310271100
3680080350
01 9901382000
01 3310271060
01 3606630050
01 3606222840
02 2101262630
02 2321080800
01 3310990060
01 3310990060
02 9901384000
01 3680080340
01 9901383000
01 9800914000
01 9901385000
01 3180590085
01 3606127530
06
06
01
01
2101263910
2321080840
3480500200
3310271040
01
01
3310271040
9700501000
01 3180071870
20 2101132290
20 2321080920
01 3606222840
01 9700502000
01 3310271140
01 9800415000
04 2101263940
04 2320080840
04 2211270050
04 9901386000
23
ITEM NO.
51 LOCKWASHER
52
53
54
55
*
*
*
WEAR PL O-RING
SCKT HD CAPSCREW
IMPELLER WASHER
56
57
58
59
*
*
*
IMP ROLL PIN
IMPELLER KEY
HEX HD CAPSCREW
WEAR PLATE
60
61 HEX HD CAPSCREW
PART NAME
63 * SEAL PLT O-RING
64 *
65 * IMP SCREW SET
66
67
68
69
COVER PLT CLAMP
MACHINE BOLT
CLEANOUT CVR ASSY
CLAMP BAR SCREW
70 *
71 SUCTION ELBOW
72
73
74
75
* PRES RELIEF VLV
PIPE PLUG
CHECK VALVE ASSY
HEX HD CAPSCREW
76
77 FLAT WASHER
78
79 CHECK VLV BODY
80
81 * CHECK VALVE
83
84
85
OIL LEVEL DECAL
SIGHT GAUGE ASSY
FLAT WASHER
86
87 BARBED ADAPTOR
88
89 TUBING CLAMP
90 SEAL DRAING PLUG
* INDICATES PARTS RECOMMENDED FOR STOCK
QTY PART NUMBER
04 2321080920
04 2211270080
01
01
01
3606131360
2102185810
9901387000
01
01
02
01
2431101410
9901389000
2101265850
9700503000
01 9901817000
02 2101255810
02 2321080920
01 3606125570
01 9902130000
01 2322150010
02
04
01
02
9901388000
2102565120
9800916000
9901311000
01 9901390000
01 9600155000
01
01
01
02
3768500300
3310271060
-
2101302590
02 3310271060
04 2320290800
02 9901356000
01 9700504000
02 2321110800
01 9700461000
01 2890090960
01
01
02
9901842000
9801497000
2321013800
01 3319321040
01 2890090940
01 2890090950
02 2890090930
03 3310241040
24
PUMP AND SEAL DISASSEMBLY AND
REASSEMBLY
Review all SAFETY Information in Section A.
Follow the instructions on all tags, label and decals attached to the pump.
This pump requires little service due to its rugged, minimum-maintenance design. However, if it becomes necessary to inspect or replace the wearing parts, follow these instructions which are keyed to the sectional views (see Figure 1) and the accompanying parts lists.
Many service functions may be performed by draining the pump and removing the back cover assembly. If major repair is required, the piping and/or power source must be disconnected. The following instructions assume complete disassembly is required.
Before attempting to service the pump, disconnect or lock out the power source and take precautions to ensure that it will remain inoperative. Close all valves in the suction and discharge lines.
For power source disassembly and repair, consult the literature supplied with the power source, or contact your local power source representative.
WARNING!
Before attempting to open or service the pump:
1. Familiarize yourself with this manual.
2. Disconnect or lock out the power source to ensure that the pump will remain inoperative.
3. Allow the pump to cool if overheated.
4. Check the temperature before opening any covers, plates, or plugs.
5. Close the suction and discharge valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump.
WARNING!
Use lifting and moving equipment in good repair and with adequate capacity to prevent injuries to personnel or damage to equipment.
Suction Check Valve Disassembly
(Figure 1)
Remove the pump casing drain plug (45) and drain the pump. Clean and reinstall the drain plug.
For access to the flap valve, loosen the cover clamp screws (9) and remove the cover clamps
(7). Remove the clean out cover (5) and gasket (6).
Reach through the access opening and remove the capscrews (75), lockwasher (80) and pivot caps
(78) which secure the flap valve assembly (81).
Remove the flap valve thorough the access opening.
Inspect the flap valve for wear or damage. Remove the four stainless steel flat washers (77) from the pivot arm. Tie and tag the washers for future reference.
If the check valve body (79) must be removed, disconnect the suction flange hardware and loosen the “victaulic” coupling clamp (4). Separate the valve body from the suction elbow. Inspect the rubber “victaulic” gasket for damage.
Pump Disassembly
(Figure 1)
Service to the wear plate (59), impeller (2), or seal assembly (3) may be accomplished from either side of the pump casing (1). The following instructions are based on service from the suction side.
Install a lifting eye bolt in the 5/8-11 UNC tapped located in the suction elbow. Tighten the eye bolt completely until the threads bottom out.
25
Remove the suction piping. Remove the suction check valve assembly (74) if additional clearance is required.
Remove the foundation hardware from the elbow support (60) and pedestal support (46). Tie and tag any shims used under the supports.
Support the suction elbow using a suitable hoist.
Separate the elbow the pump casing (1) by removing the capscrews (58), hex nut (52), and lockiwashers (51).
WARNING!
Do not attempt to lift the complete pump unit using the lifting eye. It is designed to facilitate removal or installation of individual components only. Additional weight may result in damage to the pump or failure of the eye bolt.
NOTE!
To ease removal of the suction elbow the pump casing, it may be necessary to loosen the wear plate retaining hardware (10, 11, 51 and 52). If the wear plate is loosened, the impeller face clearance will require adjustment. See Pump
Reassembly.
Inspect the wear plate (59) and O-ring (21) for damage or wear. If the wear plate must be replaced, remove the rex nuts (49) and lockwashers (48) from the wear plate studs (47). Loosen the jam nuts (11) and the adjusting screws (10) out until the wear plate is free. Inspect the O-ring (53) for damage.
To loosen the impeller (2), remove the socket head capscrew (54), the impeller washer (55), and roll pin
(56).
Install two capscrews in the 3/8-16 UNC tapped holes located in the impeller hub, and use a gear puller to slide the impeller from the shaft (30). Retain the shaft key (57). Replace the impeller if cracked or badly worn.
Remove the impeller adjusting shims (65). For ease of reassembly tie and tag the shims, or measure and record their thickness.
Seal Disassembly
NOTE!
There is an air filled cavity with an open drain hole located directly behind the seal plate
(44). If oil escapes from the drain, the seal plate would be required. The drain hole is tapped, but installation of a pipe plug is not recommended.
Before removing the seal, disconnect the feed tube (88) from the barbed elbow (86) and plug the tube to stop the flow of oil. Remove the seal cavity drain plug (90) and drain the cavity. Clean and reinstall the drain plug.
CAUTION!
Carefully remove the spring, retainer, rotating and stationary seal elements, and the shaft sleeve (64), using a stiff wire with a hooked end if necessary. Be sure to remove the two O-rings located under the shaft sleeve.
Clean the seal cavity and shaft with a soft cloth soaked in cleaning solvent.
WARNING!
Most cleaning solvents are toxic and flammable. Use them only in a well-ventilated area free from excessive heat, sparks, and flame. Read and follow all precautions printed on solvent containers.
If no further disassembly is required, refer to
Seal Reassembly .
26
Impeller Shaft And Bearing Disassembly
Disconnect the discharge adaptor (16) from the piping system by removing the attaching hardware.
If additional clearance in required, remove the capscrews (13), lockwashers (14), and hex nuts
(15) securing the discharge adaptor and gasket
(19) to the pump casing (1).
Remove the capscrews (41), lockwashers (42), and flat washers (85) securing the sight gauge brackets to the pedestal. Inspect the sight gauge
(84) and attaching parts for leaks or cracks.
Support the pump casing using a suitable hoist and remove the remaining capscrews (41) ant lockwasher (42). Separate the casing from the pedestal assembly (39).
Remove the pump casing O-ring (22) and inspect for damage.
Install a lifting eye bolt in the 5/8-11 UNC tapped hole located on top of the pedestal. Tighten the eye bolt completely until the threads bottom out.
Remove the foundation mounting hardware from the pedestal feet. Tie and tag any shims used under the pedestal.
Separate the pedestal assembly from the power source. Retain the shaft key (29).
WARNING!
Do not attempt to lift the complete pump unit using the lifting eye. It is designed to facilitate removal or installation of individual components only. Additional weight may result in damage to the pump or failure of the eye bolt.
Separate the seal plate from the pedestal by removing capscrews (23) and lockwashers (24).
Remove the pedestal O-ring (43) and seal plate
O-ring (63).
Before opening the pedestal cavity, drain the oil by removing the pedestal drain plug (38). Clean and reinstall the plug.
Remove the bearing cap (31) and wave washer (27) and inspect the bearing cap O-ring (33) for damage.
Press the oil seal (28) out of the cap, if required.
Place a block of wood against the impeller end of the shaft and drive the shaft and bearings from the pedestal bore.
Use a bearing puller to remove the inboard bearing
(40) and outboard bearing (32) from the impeller shaft.
Press the inboard oil seal (18) from the pedestal bore if badly worn.
Impeller Shaft And Bearing Reassembly
Clean the bore of the pedestal and seal plate, as well as the shaft and component parts with a cloth soaked in cleaning solvent. Inspect the parts for wear and replace as necessary.
WARNING!
Most cleaning solvents are toxic and flammable.
Use them only in a well-ventilated area free from excessive heat, sparks, and flame. Read and follow all precautions printed on solvent containers.
NOTE!
Be sure the oil return grooves provided under the bearings are clean and free of dirt.
Soak the bearings in cleaning solvent free of grit or metallic particles. Inspect the bearings and replace as necessary.
Position the inboard bearings (40) onto the shaft so that the largest shoulder of the outer race faces toward the impeller. Press the bearing on until it seats squarely against the shaft shoulder.
Press the outboard bearings (32) onto the shaft until it is fully seated.
Press the shaft and assembled bearings into pedestal bore until the inboard bearing seats squarely against the pedestal shoulder.
27
Replace the bearing cap O-ring (33) and oil seal
(28). Position the lip of the oil seal away form the oil cavity, as shown in Figure 1. Position the wave washer (27) into the bearing cap undercut and secure the bearing cap to the pedestal.
NOTE!
Before securing the bearing cap, make certain that the word “TOP” is properly positioned.
The oil groove in the bearing cap must be aligned with the oil return groove under the bearing.
Press the front oil seal (18) into the pedestal bore with the lip positioned toward the impeller end of the shaft, as shown in Figure 1.
Replace the O-rings (43 and 63) and secure the seal plate to the pedestal.
NOTE!
Apply a light coating of petroleum jelly or oil to
O-rings to ease reassembly.
Lubricate the bearing, pedestal as indicated in the
LUBRICATION section.
R E TAINER
SPRING
IM PELLER
IM PELLER
SHIM S
IM PELLER
SHAFT
BELLOW S
SPRING
CENTERING
W ASH ER
ROT AT ING
ELEMENT
DRIVE BAND
NOTE!
It is recommended that the seal assembly and impeller be reassembled at this point. Refer to the Seal Reassembly and Pump
Reassembly sections.
Connect the pedestal assembly to the power source and secure it with the foundation mounting hardware. Be certain the pump and power source are properly aligned. See
ALIGNMENT IN INSTALLATION section.
Replace the pump casing O-ring (22) and secure the casing to the pedestal assembly.
Replace the discharge flange gasket (19) and reinstall the discharge adaptor (16).
Seal Reassembly
(Figure 02)
The seal is nor normally reused because of the high polish on its lapped faces, but if it is necessary to reuse the old seal, wash all metallic parts in cleaning solvent and dry thoroughly.
ST ATION ARY
ELEM ENT
Figure 2. Seal Assembly
SE AL PL ATE
O-RINGS
SLEEVE
O-RING
INTEGRAL
SHAFT
SLEEVE
SHEAR
RING
(SHEARED)
ST ATION ARY
S EAT
28
Inspect the seal components for wear, scoring, grooves, and other damage that might cause leakage. If any components are worn, replace the complete seal; never mix old and new seal parts. Clean and polish the shaft sleeve, or replace it if there nicks or cuts on the end.
CAUTION!
This seal is not designed for operation at temperatures above 160 F. Do not use at higher operating temperatures. Lubricate the
O-rings and reinstall the shaft sleeve. Be sure the O-rings are properly positioned and no damaged during installation.
Lubricate the O-rings and bellows with petroleum jelly or oil when installing the seal, and place a drop of light lubricating oil on the lapped faces. Assemble the seal as shown in figure 2.
Pump Reassembly
Reinstall the impeller adjusting shims (65).
Reinstall the impeller key (57), and press the impeller onto the shaft. A clearance of .010 to
.020 inch between the impeller and the seal plate (44) is necessary for maximum pump efficiency. If the pump casing has already been installed, this clearance must be reached by removing impeller shims until the impeller binds against the seal plate when the shaft is turned. After the impeller binds, ass .010 inch of shims.
NOTE!
If the pump casing has not been secured to the pedestal assembly, this clearance may be measured with a feeler gauge and adjusted accordingly.
After the proper clearance has been attained, remove the impeller locking devices and clean the threads tapped in the impeller shaft with fresh cleaning solvent. Reinstall the impeller washer (55) and roll pin (56).
Prime the threads of the socket head capscrew
(54) with “Loctite Primer-T” (G-R P/N 18718-
104) and apply four drops of “Loctite 242-
31”adhesive sealant (G-R P/N 18771-040) around the circumference of the threads, one inch from the end. Reinstall the socket head capscrews and torque to 300 ft. lbs.. Recheck the impeller back clearance.
NOTE!
Secure the pump casing and O-ring (22) to the seal plate and pedestal assembly if not already done.
Secure the seal oil sight gauge brackets and assembled sight gauge components. Reinstall the oil feed tube (88) to the barbed elbow (86) and tighten the tubing clamp (89).
If the wear plate (59) was removed, lubricate the
O-ring (53) with petroleum jelly and press the assembly into the suction elbow and secure.
Replace the wear plate O-ring (21), and lubricate it with petroleum jelly. Reinstall the suction elbow and pedestal support (46) to the pump casing. Secure the elbow supports with the foundation mounting hardware.
A clearance of .010 to .020 inch between the impeller and the wear plate is necessary for maximum pump efficiency. This clearance can be reached by adjusting the wear plate. Back off the jam nuts (11) until they contact the heads of the wear plate adjusting screws (10). Tighten the adjusting screws evenly, no more than a half turn at a time, while rotating the impeller shaft until the wear plate makes contact with the impeller. Back off each of the adjusting screws a half turn, and tighten the jam nuts until they are snug against the suction head. The clearance should now be correct.
Lubricate the seal as indicated in the
LUBRICATION section.
29
Suction Check Valve Reassembly
Install the stainless steel flat washers (77) onto the pivot arm; two on each side of the flap valve
(81).
Secure the flap valve and pivot caps (78) to the check valve body using the attaching hardware
(75 and 80).
NOTE!
The flap valve must be positioned so that
½”diameter core holes face toward the interior of the pump.
Secure the check valve assembly (74) to the suction elbow with the “victaulic” coupling. Be sure the rubber gasket is properly seated and not damaged.
Reach through the access opening and check the operation of the check valve to insure proper seating and free movement.
Replace the access cover gasket (6) and secure the cover using the clamps (7) and cover screws
(9).
Reinstall the suction and discharge piping.
Before starting the pump, make certain the pump and power source are properly aligned, the piping is secure, the casing filled with liquid, and all connecting valves are open.
LUBRICATION
Seal Assembly
Before starting the pump, remove the air vent fitting from the top of the sight gauge assembly
(84) and fill the reservoir with S.A.E. # 30 nondetergent oil. The oil level must be maintained above the oil level indicated, or at least 2 inches of oil from the bottom of the glass. Clean and reinstall the air vent fitting.
Periodically, clean and reinstall the seal cavity air vent (25).
Bearings
The bearing housing oil level must be maintained at the midpoint of the oil level sight gauge (36).
When oil is required, remove the pedestal air vent (26), and fill the bearing housing with a good grade of non-detergent SAE n° 30 motor oil to the midpoint of the oil level sight gauge.
Clean and reinstall the pedestal air vent. Do not overfill. Overfilling will cause excessive heat resulting in shortened bearing life.
Under normal conditions, change the oil each
5000 hours of operation, or at 12 month intervals, which ever occurs first. In dirty or humid conditions change more frequently.
For cold weather operation, consult factory or lubricant supplier for recommended grade of oil.
30
WARRANTY
Pumping units manufactured by the Bombas Esco
Company, are guaranteed to be free from defects in material and workmanship for one year from date of shipment from factory. The obligation under this Warranty, statutory or otherwise, is limited to replacement or repair at factory or at a point designated by Esco, of such as part as shall appear to us upon inspection at such point, to have been defective in material or workmanship.
This Warranty does not obligate the Bombas Esco
Company to bear the cost of labor or transportation charges in connection with replacement or repair of defective parts; nor shall it apply to a pump upon which repairs or alterations have been made unless authorized by Bombas Esco.
No warranty is made in respect to engines, motors, or trade accessories, such being subject to warranties of their respective manufactures.
In Submersible Pumps, pump and motor are integral and
Submersibles are warranted as a unit. Since motor is subject to an important degree upon quality and performance of electrical controls, unit warranty is valid only when controls have been specified and provided by
Bombas Esco.
No express implied or statutory warranty, other here set forth is made or authorized to be made by Bombas Esco.
In no event shall the Bombas Esco Company be liable for consequential damages or contingent liabilities arising of the failure of Bombas Esco pump or parts there of to operate properly.
THOMAS PUMP & MACHINERY
●
SLIDELL, LA 70460, USA
31
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