TRUCK SERVICE MANUAL
MISCELLANEOUS
MODEL WP
40-GPM
DIRECTIONAL CONTROL VALVE
Fully Balanced - Self Centering Spools
Built-in "High Lift" Ball-Spring Cartridge Type Relief Valve with
Hardened Seat
Pilot Operated Relief Valve - (Optional)
Tripod Mounting Feet
Load Checks on Each Spool
Accurately Feathered Spools for Fine Metering Action
Hardened and Chrome Plated Spools
Optional 180 Handle Position
SAE Straight Threads "Inlet", "Outlet" and "Cylinder Ports"
(Optional)
High Pressure Carry-over (Power Beyond) (Optional)
SPECIFICATIONS
Capacity.........................Up to 40 GPM (W/Pilot Operated Relief
Up to 38 GPM (W/Standard Ball-Spring Relief
Maximum Pressure ............................................................ 2000 PSI'
*(2500 PSI W/Pilot-Operated Relief and Heavy Spool Centering Spring)
NOTE :Unless otherwise specified on order, unit relief valve will be factory set at 1000 PSI @ 24 GPM.
Shipping Weight
1-Spool ............................................................................... 35lbs.
NO LOAD DROP WITH INDIVIDUAL LOAD CHECKS ON EACH SPOOL
With individual check valves for each spool, there is no momentary reversal of the cylinder, nor can the load
drop as the spool is shifted. Loads may be accurately positioned with the check valve assuring positive
control. Also, these valves prevent back filling from one cylinder to another when two spools are operated
simultaneously.
PORT SIZES
Standard - Cylinder (Work) Parts .................................................................................................... 3/4"-14 NPTF
End Inlet.......................................................................................................................... 1"-11 Y NPTF
End Outlet .................................................................................................................1 1/4"-1 1/2" NPTF
SPOOLS
The standard valve spools, 3-way have the Open Center spool design. This allows the oil to pass through Open
Center to the return line when the spool is in the neutral position. A 3-way spool is used to control a single-acting cylinder
or motor having one direction of rotation
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