Bosch Rexroth | 4WEH22W7X6EW110N9DK25L
4WEH22W7X/6EW110N9DK25L
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The 4WEH22W7X/6EW110N9DK25L valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth. It directs hydraulic flow in automated circuits through a 4-way, 3-position arrangement so actuators can extend, retract, or hold. The NG25 size interface allows high capacity, and the W spool provides a maximum flow of 450 l/min. In its neutral state the flow cross-section between ports A–T and B–T is 10 mm², limiting leakage while the system is idle. The valve withstands up to 280 bar on ports P, A, and B, enabling use in medium-pressure machinery. Connection is made on a subplate mounting surface that follows porting pattern ISO 4401-08-08-0-05, and six M12 × 60 screws secure the housing. A mass of 11.9 kg for the two-solenoid version supports rigid installation without additional bracing.
Pilot operation specifications include a maximum pilot pressure of 210 bar and a minimum of 10.5 bar for the spring-centered return, ensuring reliable spool shift under varying supply conditions. Fluid cleanliness must meet ISO 4406 class 20/18/15 to maintain consistent performance and long life. The mounting face roughness is limited to Rzmax 4 to prevent bypass paths between the valve and subplate. Each screw requires a tightening torque of 100 Nm, producing even clamping across the gasket surface. The design achieves an MTTFd of 100 years, reflecting a low likelihood of dangerous failure in service. Together these values define installation, operation, and service intervals for the 4WEH22W7X/6EW110N9DK25L spool valve within automated hydraulic systems.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Cross-section In Zero Pos. (w A–t; B–t)
10 mm²
Max Flow (spool W)
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Mounting Face Roughness
Rzmax 4
Mounting Screws
6 × M12 × 60
Mounting Type
Subplate Mounting
Mttfd
100 years
Porting Pattern
ISO 4401-08-08-0-05
Screw Tightening Torque
100 Nm
Size
NG25
Spool Symbol
W
Way/position
4-Way, 3-Position
Weight (two-solenoid)
11.9 kg
1620 Old Apex Road
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