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Overview
The FlowMaster II rotary driven hydraulic
pump is a fully hydraulically operated
adjustable grease pump.
Grease output is proportional to the
hydraulic input flow. The pump is primarily
designed for centralized lubrication systems
such as the parallel, single line progressive
and two line systems. An integrated pump
control manifold is incorporated with the
input flow and pressure.
Using hydraulic power, this pump is
exclusively designed to pump and dispense
lubricants. Specifications are listed in Table 1
for the pump.
The maximum specification ratings should
not be exceeded. Do not exceed
3 000 psi (206 bar) maximum supply inlet
hydraulic pressure. Exceeding the rated
pressure may result in personal injury or
damage to system components.
Fig. 2, page 7 details the grease output in
proportion to the hydraulic input, which is
affected by temperature.
Pump specifications
Description
Hydraulic inlet flow
Operating temperature
Operating working hydraulic pressure
Solenoid voltage, for the on/off solenoid
Hydraulic inlet port, in
Tank return port, in
Maxiumum supply inlet hydraulic pressure
Pump outlets
Maximum hydraulic fluid temperature
Pump ratio with manifold
A 24 V
solenoid valve is also incorporated
as a method to turn the pump on and off.
The pump is driven by the rotary motion
of the hydraulic motor. Rotary motion is
converted to reciprocating motion through
an eccentric crank mechanism. The
reciprocating action causes the pump
cylinder to move up and down. The unit is a
positive displacement double-acting pump,
as grease output occurs during both the up
and down stroke.
During the down stroke, the pump
cylinder is extended into the grease.
Through the combination of shovel action
and vacuum generated in the pump cylinder
chamber, the grease is forced into the pump
cylinder. Simultaneously, grease is
discharged through the outlet of the pump.
The volume of grease during intake is twice
the amount of grease output during one
cycle. During the upstroke, the inlet check
closes, and one half of the grease taken in
during the previous stroke is transferred
through the outlet check and discharged to
the outlet port.
Fig. 1, page 7 is the hydraulic schematic
showing the key sub-assemblies of the
pump.
Parameter
2 US gpm (7.6 liters/min)
–40 to 150 °F (–40 to 65 °C)
400 psi (27.5 bar)
24 V
SAE 4
SAE 6
3 000 psi (206 bar)
/
in NPTF
1
4
250 °F (121 °C)
10:1
6
Table 1
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