Bosch Rexroth | 4WEH10HD4X6EW110N9K4B10
4WEH10HD4X/6EW110N9K4/B10
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The 4WEH10HD4X/6EW110N9K4/B10 valve is manufactured by Bosch Rexroth and belongs to the WEH Directional Spool Valves series. It directs pressurized fluid in automation circuits where electric solenoids shift the spool to predefined positions. The valve conforms to size NG10, standardizing mounting dimensions for mid-flow systems, and it fits manifolds that follow the ISO 4401-05-05-0-05 porting pattern. Operating channels p, A, and B tolerate pressures up to 350 bar, while port T withstands 315 bar when an external drain is used. The hydraulic end can pass up to 160 l/min, enabling rapid actuator movement, and the pilot stage accepts supply up to 250 bar yet needs only 7 bar to start shifting. Pilot return lines are rated for 160 bar to maintain balance during dynamic cycling. Electrical actuation is achieved through a DIN EN 175301-803 K4 connector that simplifies field wiring.
Reliability and service features are addressed by additional design points. A concealed manual override labeled N9 allows local spool movement without exposing moving parts. Stroke adjustment changes spool travel by 1 mm per screw turn, giving fine control of overlap. For inlet damping, a throttle insert with a 1.0 mm orifice identified as B10 can be fitted. Installation requires four M6 × 45 bolts, and each bolt should be tightened to 12.5 Nm to secure the valve block. Fluid cleanliness must meet ISO 4406 class 20/18/15 to protect internal lands from wear. The calculated mean time to dangerous failure is 100 years, reflecting the robust WEH construction. These characteristics support dependable operation in automated hydraulic machinery.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (hd)
160 l/min
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (y, Ac)
160 bar
Max Pressure (p, A, B)
350 bar
Max Pressure Port T (y External)
315 bar
Min Pilot Pressure (2-spool Hydraulic End)
7 bar
Mounting Screws
4× M6 × 45
Mttfd (type Weh)
100 years
Porting Pattern
ISO 4401-05-05-0-05
Size
NG10
Stroke Adjust Per Turn
1 mm
Throttle Insert
Ø 1.0 mm (B10)
Tightening Torque
12.5 Nm
1620 Old Apex Road
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