Danfoss PVG 32, Техническая информация

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Electrical and hydraulic remote control units
PVRE, electrical control unit, 162F…
Prof 1, 162F…
PVREL, electrical control unit, 155U… PVRES, electrical control unit, 155B…
PVRH, hydraulic control unit, 155N…
155N0003 155N0001 155N0004 155N0005 155N0002
PVG 32 with open center PVP
PVG 32 with open center PVP (fixed displacement pump) and PVB with flow control spool.
When the pump is started and the main spools in the individual basic modules (11) are in the neutral
position, oil flows from the pump, through connection P, across the pressure adjustment spool (6) to
tank.
The oil flow led across the pressure adjustment spool determines the pump pressure (stand-by pressure).
When one or more of the main spools are actuated, the highest load pressure is fed through the shuttle
valve circuit (10) to the spring chamber behind the pressure adjustment spool (6), and completely or
partially closes the connection to tank to maintain pump pressure.
Pump pressure is applied to the right-hand side of the pressure adjustment spool (6).
The pressure relief valve (1) will open should the load pressure exceed the set value, diverting pump flow
back to tank.
In a pressure-compensated basic module the compensator (14) maintains a constant pressure drop
across the main spool – both when the load changes and when a module with a higher load pressure is
actuated.
With a non pressure-compensated basic module incorporating a load drop check valve (18) in channel P,
the check valve prevents return oil flow.
The basic module can be supplied without the load drop check valve in channel P for functions with over-
center valves.
The shock valves PVLP (13) with fixed setting and the suction valves PVLA (17) on ports A and B are used
for the protection of the individual working function against overload and/or cavitation.
Technical Information
PVG 32 Proportional Valve Group
General description
© Danfoss | August 2017 520L0344 | BC00000038en-US0802 | 7