70P_2006

70P_2006
MODEL
70P
BRONZE PEDESTAL
CENTRIFUGAL PUMPS
PIPE SIZE: INLET 1 1/4”, OUTLET 1”
Capacity - Water at 70o F
FEATURES
• Rugged Bronze Construction
• Quiet Operation
• O-Ring Housing seal eliminates gasket problems
• Mechanical Seal - Carbon/Ceramic
- Buna - standard
- Viton (S10) or Teflon (S11) - options
• Designed for Pulley Drive
• Heavy Duty Integral Steel Shaft and Ball Bearings
• Handles Contaminated Liquids
• No bearing lubrication required
• For Close Coupled Style, see Model 700
USES
Silent, efficient, centrifugal pumping is ideal for convenient equipment location in offices, laboratories, public areas,
and living quarters. Long trouble-free service life has made
centrifugal pumps acceptable for industrial uses or wherever
clean or contaminated liquid compatible with bronze is to be
transferred or handled.
The 70P centrifugal pump has an external ball bearing
isolated from the liquid being pumped. The ball bearing is
greased and sealed for life, requiring no maintenance.
CHARACTERISTICS
Oberdorfer centrifugal pumps have a single rotating
metal impeller. Liquid enters at the center and is thrown outward radially by centrifugal force. The impeller is not in contact
with other pump parts resulting in quiet, efficient, pumping
action. The flow produced is not positive which permits the discharge line to be shut off completely without danger of overloading motors or bursting lines. Consequently a relief valve is
not required.
The liquid flow varies directly as the pump speed--the
higher the speed the greater the flow. Horsepower required
varies directly as flow and pressure. Maximum horsepower is
required with a wide open discharge line. This is the point of
www.oberdorfer-pumps.com
maximum flow. With a throttled discharge, the flow decreases at a
greater rate than the pressure increases thereby requiring less
horsepower at the higher pressures. This is known as an “unloading”
feature of the pump.
This centrifugal pump is not self priming. Normally these
pumps must be installed below the liquid level so that the liquid flows
to the pump by gravity. However, if a foot valve is used at the beginning of the suction line and all air is bled from the suction line and
pump by careful manual priming, these pumps will lift liquid on the
suction side up to 15 ft. Such a system is only as positive as the ability of the foot valve to seal and keep the suction line and pump full
of liquid. If the foot valve should leak, the pump will not prime.
The pedestal centrifugal pumps can be direct driven by electric
motors at either 3450 R.P.M. or 1725 R.P.M. Performance for both
speeds are shown in the curves above. The 70P pedestal centrifugal
pump can be pulley driven at any desired intermediate speed.
Because centrifugal pumps are more efficient at higher shaft
speeds, pumping of viscous or thick liquids is difficult. It is possible
to lose as much as 40% pump performance when attempting to
pump liquids of viscosity equal to S.A.E. 30 oil at room temperature.
S.A.E. 30 oil at room temperature has a viscosity of 2000 Saybolt
Seconds Universal. More viscous liquids are not recommended for
centrifugal pumps.
Heavy liquids can be pumped; however, they demand more
horsepower in direct ratio to the weight of water. For example, car-
PHONE (800) 448-1668; (315) 437-0361
FAX (315) 463-9561
MODEL
70P
BRONZE PEDESTAL
CENTRIFUGAL PUMPS
EXPLODED VIEW AND PARTS LIST
1
Pump
No.
Screw
2
Screw
3
Plug
4
Body
5 Req'd 3 Req'd 2 Req'd 1 Req'd
5
1
61
O-Ring
Impeller
1 Req'd
71
Seal
1
9
8
Pedestal Shaft &
Assembly
Cover
1 Req'd
1 Req'd
1 Req'd
Bearing
10
Ret.
11
Set
Repair
Ring
Screw
Kit
1 Req'd 1 Req'd 1 Req'd
70P
Buna Mechanical
9783-04 9783-14
5395
5266
9797-157
5267
32154
5272
5348
5741
---
10693
70PS-10
Viton Mechanical
9783-04 9783-14
5395
5266
9797-157
6179
32210
5272
5348
5741
---
11161
70PS-11
Teflon Mechanical
9783-04 9783-14
5395
5266
9355-157
6179
32211
6358
5348
5741
---
11366
Buna, Keyed Shaft, 3 Phase Impeller 9783-04 9783-14
5395
5266
9797-157
6521
32154
5272
8114
5741
9849
11188
70P-35
1
Repair Kit contains items 5, 6, 7, & 9. (and 5307 gasket for older models)
DIMENSIONS
(continued from front)
LIQUIDS AND TEMPERATURES
Bronze pumps are suitable for most common liquids in the
PH-range from 4 to 11.
The temperature limit for bronze pumps is 212oF, higher
temperatures are possible with Viton® or Chemlon seals. If in
doubt, consult with factory.
SHAFT SEAL OPTIONS
Mechanical Shaft Seals have Buna rubber components
(212oF max) as standard. For temperatures up to 400oF a Viton®
seal must be selected by adding code S10 to the pump number.
To handle strong solvents and chemicals (compatible with
bronze), a Chemlon seal (500oF max) must be specified by
adding code S11 to the pump number.
In most instances, Viton® and Chemlon seals are not field
interchangeable with the standard Buna seals. Call factory for
details.
*Viton® is a registered trademark of DuPont Dow Elastomers. Viton(R) or equivalent FKM will be used.
5/06
www.oberdorfer-pumps.com
Specifications are subject to change without notice.
PHONE (800) 448-1668; (315) 437-0361
FAX (315) 463-9561
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement