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Parker Hannifin Corporation
Open-Center Directional Control Valve
VO40
Catalog HY17-8505/UK
The inlet cover of VO40 is available in two versions. One is the standard inlet and the other is an inlet with a sole-
noid pump unloader (in development). The porting location options for the standard inlet are:
1) Top/side – inlet and outlet ports. Any unused ports can be plugged.
2) Top – inlet and outlet ports only.
All inlet bodies have a gage port, that comes plugged. SAE #4 (7/16"x20 UNF thread) or 1/4" BSP.
The coding to specify an inlet cover is accomplished by eight fields, as shown below:
[12] – Max Pump Flow
The pump inlet flow can be selected in LPM or GPM.
[15] – Type of Inlet
I Standard Inlet.
IU Inlet with pump unload, solenoid actuated (in development).
[24] to [27] – Inlet Porting Options
INLET
OUTLET
GAGE
TANK TANK
OPEN
CENTER
PARALLEL
PATH
INLET
OUTLET
TANK
OPEN
CENTER
PARALLEL
PATH
INLET
GAGE
1) Standard – Top & Side Inlet/Outlet Ports 2) Standard – Top Inlet/Outlet Ports
Ordering Information – Inlet Cover