Parker PV046 - Proportional displacement control with pressure compensation

6
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Bulletin MSG30-3254-INST/UK
Installation and setup manual
The compensator code ...UDR (PVCMD1FBU** +
open NG6 pattern), ...UDK (PVCMD1FBU** +
PVACRE***K**) include a pressure compensa-
tion, which can override the proportional dis-
placement control. This is achieved by combining
a second control valve (remote pressure compen-
sator) with the displacement control valve. Figure
5 show the hydraulic circuit of the UDK option.
3. Proportional displacement control with pressure compensation,
codes ...UDR, ...UDK (old: UPR, UPK)
S T
M
P1
P
p
A
AP
T
AP
T
S
U
P
T
M
WV
B
P
B
D2
AP
T
AP P
P
T
X
Q
X
p
I
P
I
Q:A
I
Q:B
W
Q
W
p
Displacement control
Code PVCMD1FBU**
Pressure compensator
Stage, Code PVCM*U2**
Proportional pressure pilot
valve, Code PVACRE***K**
(not included with code ...UDR)
X
Q
= signal, displacement
I
Q:A
= solenoid current A, displacement control valve
I
Q:B
= solenoid current B, displacement control valve
I
P
= solenoid current, pressure pilot Valve
W
Q
= command, displacement
W
P
= command, pressure
Figure 5: Hydraulic Circuit of the …UDR, …UDK control