PVG with the PVE overview
The PVG is a sectional spool valve stack with up to 12 individually controlled proportional valves. The PVG
with the PVE can be operated as single valves or several valves in cooperation. The oil flow out of the
work section (A- or B-port) can be controlled by a combination of the following:
•
PVE controlling the spool position using pilot oil pressure.
•
A handle (PVM) in mechanical interface with the spool.
The analog PVE Series 7 is an electro-hydraulic actuator used to control a single work section of a PVG
proportional valve group. The PVE Series 7 actuator program includes variants with different
performance levels and features for PVG 32/100/120/128/256.
The actuator positions the main spool in a PVG work section in order to control either the flow or the
pressure of the oil distributed to/from the work function. The control signal to the actuator is an analog
voltage signal, enabling the user to operate the work function remotely by means of a joystick, a
controller or the like.
The electro-hydraulic solenoid valve bridge of the actuator is available in different designs, utilizing
different regulation principles, depending on performance variant. The actuator positions the main spool
by distributing pilot oil pressure to either side of it, pressurizing one side by pilot pressure while relieving
the opposite side to tank and vice versa. All proportional actuators feature a closed-loop spool control
and continuous fault monitoring.
The analog PVE Series 7 actuator program features five different main hydraulic principle variants
(PVEO/M/A/H/S). The different hydraulic principles combined with the different solenoid valve regulation
principles determine whether the actuator controls the spool proportionally according to a demand
signal or ON/OFF according to a voltage signal.
Valve section - standard mounted - seen from PVP with naming
Troubleshooting
The Service Manuals for PVG 32 and PVG 100 have a thorough description of system troubleshooting and
parts troubleshooting. Please look for descriptions there before starting with the actuator. The actuator is
an electrohydraulic subsystem used for moving the spool and thereby opens the valve for work flow.
Service Manual
PVE Series 7
General Information
©
Danfoss | August 2017
AX00000348en-US | 0101 | 9
