Remote Pressure Compensated Controls; Remote Pressure Compensated System Characteristics; Typical Applications For Remote Pressure Compensated Systems; Pvpc With Check Valve For Open Center Pvp - Danfoss PVG 32 Technical Information

Technical Information
PVG 32 Proportional Valve Group
Function

Remote pressure compensated controls

PVPC with check valve for open center PVP

© Danfoss | November 2017
The remote PC control is a two-stage control that allows multiple PC settings. Remote PC controls are
commonly used in applications requiring low and high pressure PC operation.
Typical operating curve
Q max
0
0
Pressur e
The remote PC control uses a pilot line connected to an external hydraulic valve. The external valve
changes pressure in the pilot line, causing the PC control to operate at a lower pressure. When the pilot
line is vented to reservoir, the pump maintains pressure at the load sense setting.
When pilot flow is blocked, the pump maintains pressure at the PC setting. An on-off solenoid valve can
be used in the pilot line to create a low-pressure standby mode. A proportional solenoid valve, coupled
with a microprocessor control, can produce an infinite range of operating pressures between the low
pressure standby setting and the PC setting.
Size the external valve and plumbing for a pilot flow of 3.8 l/min [1 US gal/min]. For additional system
protection, install a relief valve in the pump outlet line.

Remote pressure compensated system characteristics:

•
Constant pressure and variable flow
•
High or low pressure standby mode when flow is not needed
•
System flow adjusts to meet system requirements
•
Single pump can provide flow to multiple work functions
•
Quick response to system flow and pressure requirements

Typical applications for remote pressure compensated systems:

•
Modulating fan drives
•
Anti-stall control with engine speed feedback
•
Front wheel assist
•
Road rollers
•
Combine harvesters
•
Wood chippers
PVPC with check valve is used in systems where it is necessary to operate the PVG 32 valve by means of
the electrical remote control without pump flow. When the external solenoid valve is opened, oil from
the pressure side of the cylinder is fed via the PVPC through the pressure reducing valve to act as the
Closed center circuit with remote PC
P101 969E
P101 966
BC00000038en-US0803 | 17