Load Sensing System Characteristics; Remote Pressure Compensated Controls; Remote Pressure Compensated System Characteristics - Danfoss PVG 100 Technical Information

Technical Information
PVG 100 function

Remote pressure compensated controls

PVG 100 Proportional Valve Group

Load sensing system characteristics:

•
Variable pressure and flow
•
Low pressure standby mode when flow is not needed
•
System flow adjusted to meet system requirements
•
Lower torque requirements during engine start-up
•
Single pump can supply flow and regulate pressure for multiple circuits
•
Quick response to system flow and pressure requirements
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
520L0720 • Rev EB • Jan 2014
Closed center circuit with remote PC
P101 969E
P101 966
15