Variable displacement pump
Series VP1-095 / -110
/
-130
Bulletin MSG30-8214-INST/UK
Installation information
4
Parker Hannifin
Pump & Motor Division Europe
Trollhättan, Sweden
51.5
32
8.5
41
92
9
�
40
30
53
φ
6.5
(x2)
T
P
S
X
BPV-VP1_unloading_valve.ai
Leif A./09-04-15
BSP 1/4"
(x3)
BPV-VP1
unloading valve
Fig. 5. BPV-VP1 unloading valve.
For more information also see MSG30-8226-INST/UK,
Installation Information Unloading Valve BPV for VP1
VP1 installation on an engine PTO
BPV-VP1 unloading valve
The BPV-VP1 unloading valve is utilized in
hydraulic systems where the pump is in
constant operation.
The valve protects the pump from being
overheated in the off-load mode by allow-
ing a small flow through the pump. When
load sensing valve function is engaged, the
bypass flow is cut off (as port ‘X’ is being
pressurized).
The valve will also de-air the suction line
and the pump body after a long standstill.
(The pump is assembled above the oil-
tank and during the standstill some of the oil
in the pump housing has been drained back
to the oil-tank)
Valve type
Ordering number
BPV-VP1
379 8799