MODELS 50P-15 50P-35 BRONZE

MODELS 50P-15 50P-35 BRONZE
BRONZE
CENTRIFUGAL PUMPS
PIPE SIZE: INLET 3/8”, OUTLET 3/8”
MODELS
50P-15
50P-35
Capacity - Water at 70o F
50P-35 shown
FEATURES
All Bronze Construction
Heavy Duty Ball Bearings
Designed for Pulley Drive
Mechanical Seal
Quiet Operation
Handles Contaminated Liquids
No Lubrication Required
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 50P centrifugal pumps have 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 is proportional to 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
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.
www.oberdorfer-p
pumps.com
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 50P pedestal centrifugal
pumps 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, carbon tetrachloride has a specific gravity of 1.6 which means it is 1.6
times heavier than water and the horsepower required is 1.6 times
water horsepower.
(continued on back)
PHONE 800-4
448-1
1668; (315) 437-0
0361
FAX (315) 463-9
9561
BRONZE
CENTRIFUGAL PUMPS
OBERDORFER PUMPS
MODELS
50P-15
50P-35
A Subsidiary of Thomas Industries Inc.
EXPLODED VIEW AND PARTS LIST
Pump
1
2
No.
Screw
Cover
31
41
Gasket Impeller
51
6
7
8
9
10
Seal.
Plug
Body
Slinger
Screw
Ret.
Shaft & Pedestal
Ring
Bearing
Assy.
111
6 Req'd 1 Req'd 1 Req'd 1 Req'd 1 Req'd 1 Req'd 1 Req'd 1 Req'd 1 Req'd 1 Req'd 1 Req'd
50P-15
5385
6483
6502
12
13
Shim
Repair
Kit
1 Req'd
1 Req'd
6476
32154
6052
6475
---
5595
5741
5348
6484
602502
10690
50P-35
5385
6483
6502
6476
1
Items 3, 4, 5, & 11 are included in Repair Kit.
32154
6052
6475
7447
5595
5741
8114
6484
602502
11369
Differences between 50P-35 and 50P-15: slinger between seal and bearing, keyed shaft at drive end, top horizontal outlet position.
DIMENSIONS
(50P-15 shown)
(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(R)* or Chemlon seals. If in doubt,
consult with factory.
5/04
www.oberdorfer-p
pumps.com
SHAFT SEAL OPTIONS
Mechanical Shaft Seals have Buna rubber components
(212oF max) as standard. For temperatures up to 400oF a
Viton(R)* 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(R)* and Chemlon seals are not
field interchangeable with the standard Buna seals. Call factory for details.
*Viton(R)* is a registered trademark of DuPont Dow Elastomers. Viton(R) or equivalent FKM will be used.
Specifications are subject to change without notice.
PHONE 800-4
448-1
1668; (315) 437-0
0361
FAX (315) 463-9
9561
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