Bosch Rexroth | H-4WEH25J6X6EW110N9ETK4B10D3
H-4WEH25J6X/6EW110N9ETK4/B10D3
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The H-4WEH25J6X/6EW110N9ETK4/B10D3 valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth for controlling hydraulic actuators. It is a 4-way unit, so it can direct pressure to two work ports while providing return paths. A J-coded spool pattern sets the specific overlap and porting sequence used during shifting. The nominal size is NG25, giving internal passages that support a maximum flow of 520 l/min when the system pressure reaches 350 bar. Ports P, A and B may be loaded up to 350 bar without jeopardizing service life, and port T tolerates back-pressure up to 250 bar to suit restrictive tank lines. The spool is spring-centered, ensuring automatic return to neutral once pilot oil is vented. Shifting begins at a pilot pressure of 13 bar and must remain below 250 bar to avoid stressing the control cover. A secondary pressure setting of 45 bar in the D3 gallery isolates upstream logic components from higher main-line pressures.
Mechanical and electrical installation parameters are defined for repeatable mounting. The body mates to an ISO 4401-08-08-0-05 interface, and six M12 × 60 screws to ISO 4762 clamp it to the subplate; each bolt requires 100 N·m of torque to maintain the seal under load. Coil power is supplied through a K4 connector compliant with DIN EN 175301-803, which provides quick removal for service. A 1.0 mm throttle insert orifice meters pilot flow to slow spool acceleration and prevent pressure spikes during rapid cycling. The assembled unit weighs 19.0 kg, so a rigid manifold surface and adequate lifting method should be planned during installation.
Technical Specifications
D3 Secondary Pressure
45 bar
Electrical Connection
DIN EN 175301-803 (K4)
Max Flow (j, 350 Bar)
520 l/min
Max Operating Pressure (p, A, B)
350 bar
Max Pilot Pressure
250 bar
Max Port T Pressure
250 bar
Min Pilot Pressure (spring-centered)
13 bar
Mounting Interface
ISO 4401-08-08-0-05
Mounting Screws
6x M12 x 60 (ISO 4762)
Nominal Size
NG25
Screw Tightening Torque
100 Nm
Spool Return
Spring-Centered
Spool Symbol
J
Throttle Insert Orifice
1.0 mm
Way Configuration
4-Way
Weight
19.0 kg
1620 Old Apex Road
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