Oberdorfer Centrifugal Pedestal Pump Model# 60PS-10
Oberdorfer™ centrifugal pumps have a single rotating metal impeller.
Liquid enters at the center and is thrown outward radically 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. 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 60P 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.
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.
FEATURES
- Rugged Bronze Construction
- Quiet Operation
- O-Ring Housing seal eliminates gasket problems
- Mechanical Seal - Carbon/Ceramic, Nitrile - standard, Fluoroelastomer (S10) or Polytetrafluoroethylene (PTFE) (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 600
DRIVE
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 60P
pedestal centrifugal pump can be pulley driven at any desired
intermediate speed.
LIQUIDS & TEMPERATURES
Bronze pumps are suitable for most common liquids in the PH-range from 4 to 11.
The temperature limit for bronze pumps is 212o F, higher temperatures are possible with Fluoroelastomer or Chemlon seals. If in doubt, consult with factory.
SUCTION LIFT
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.
