Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
13
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
For code PVAC2P... a single solenoid directional
control valve is included for pressure selection.
The valve switches between low pressure setting
and high pressure setting. During low pressure
both pilot cartridges are connected to the com-
pensator, in the high pressure setting (solenoid
energized) only the A-side cartridge is con-
nected. Therefore the B-side pilot needs to be set
for lower pressure. The directional control valve
series D1VW has spool code 006.
For code PVAC2E... for pressure selection a
two- solenoid DCV is included, which selects be-
tween low pressure setting, high pressure setting
and stand-by pressure. In neutral position both
cartridges are connected to the compensator
valve. The lower pressure defines the compensat-
ing pressure of the pump. When the A solenoid
(B-side) of the DCV is energized only the A-side
cartridge is connected; the (higher) pressure ad-
justed there defines the compensating pressure.
When solenoid B is energized the valve spool con-
nects all four ports. Then the spring chamber of
the compensator valve is directly relieved to the
case drain of the pump, the pump compensates
at minimum compensating pressure (stand-by).
The directional control valve series D1VW has
spool code 055. This spool code is used to avoid
a blocked spool position during transient.
This version is recommended, when during a
machine cycle the pressure is to be switched
between high and low.
For code PVAC2M... also a dual solenoid valve
is used. In neutral position all four ports are con-
nected. The compensator spring chamber is
releived to case drain, the pump is compensating
at min. compensating pressure (stand-by).
P
T
P
T
P
T
P
T
P
T
p1
p1
p1
p2 p2
(>p2)
A
B
P T
A
B
P T
A
B
P T
PVACPPPVAC1P... PVAC2P...
(PVAC2E...)
PVAC1E...
PVAC2M...
When energizing solenoid A (B-side) the spring
chamber is connected to the A-side pilot car-
tridge; the pressure adjusted here controls the
pump.
When solenoid B is energized the spring chamber
of the compensator is connected to pilot car-
tridge B; then the pressure adjusted on this car-
tridge defines the pump compensating pressure.
The DCV of series D1VW has spool code 002.
This version should be used, when stand-by op-
eration should be the default situation.
Code PVAC1E... is similar to code PVAC2P...,
with the exception, that only one pilot cartridge
is installed. In neutral position of the D1VW the
stand-by pressure is selected.
Additional information can be found in:
compensator spare parts manual PVI-PVC-UK-45
compensator accessories spare parts manual
PVI-PVAC-UK
pumps spare parts manuals PVI-***-UK-45 with
*** = BG1 to BG5 according to pump frame size.
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