Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
9
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
6. Remote pressure compensator, codes ...MRC, ...MR1 and ...MRZ
The remote pressure compensators code ...MR*
are equipped with a remote control port. To this
port external pilot valves can be connected. The
distance between pump and pilot valve can be
up to 15 m. The pilot line should be designed, to
avoid pressure losses.
Especially at low environmental temperatures
a too narrow pilot line can result in a significant
pilot orifice
integrated pilot valve
pressure
pilot chamber
control spool
compensator differential adjustment
lock nut
remote control port
lock nut
compensator pressure adjustment
The load sensing or flow compensator primarily
controls the pump output flow. To achieve this
the load pressure after a main stream throttle
valve (load sensing valve, not included in the
shipment of the pump) is connected to the load
sensing port of the compensator. The compensa-
tor control strategy is, to keep the pressure drop
constant across this main stream throttle valve.
The integrated pilot valve maintains a pressure
compensation when the adjusted max. pres-
sure is reached. The pilot orifice Ø 0,8 mm is
located in the load sensing port adapter. This
orifice replaces the orifice in the control spool of
the ...MM* and ...MR* compensators, because
pilot pressure is in the load sensing compensator
provided through the load sensing line.
Load sensing and pressure compensators only
differentiate by the control spool and by the loca-
tion of the pilot orifice.
Beside the version shown above (code ...MFC)
also a version ...MF1 with a topside NG6 / D03
compensator differential adjustment
lock nut
load sensing port
lock nut
compensator pressure adjustment
7. Load sensing compensator, codes ...MFC, ...MF1 and ...MFZ
pressure increase. The nominal pilot flow is in the
range of 1.2 to 1.4 l/min.
Beside the version shown above (code ...MRC)
also a version ...MR1 with a topside NG6 / D03
interface is available as well as a version ...MRZ
without integrated pilot valve for the use with
compensator accessories code PVAC... .
For the compensators with code ...MM* and
...MR* the pilot pressure pressure supply is
maintained through an orifice located in the
control spool.
interface is available as well as a version ...MFZ
without integrated pilot valve for the use with
compensator accessories code PVAC... .