Bosch Rexroth | 4WEH10H4X6EG12N9TS2K4
4WEH10H4X/6EG12N9TS2K4
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The 4WEH10H4X/6EG12N9TS2K4 directional spool valve is manufactured by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic flow in automated circuits by shifting a symbol H spool at nominal size 10. The valve handles a maximum operating pressure of 350 bar on ports P, A, and B to accommodate high-pressure systems. A maximum flow of 160 l/min can pass through the NG10 passage which suits medium-capacity actuators. Pilot oil is supplied externally through port X, while the return is routed internally to port T for circuit simplicity. Correct installation uses four M6 × 45 mounting screws tightened to 12.5 Nm, ensuring the unit seats properly on the manifold. The electrical connector follows DIN EN 175301-803 version K4 for quick solenoid wiring.
The interface pattern matches ISO 4401-05-05-0-05 so it fits standard NG10 subplates. A concealed manual override coded N9 allows local actuation when electrical power is absent. The pilot stage accepts pressures up to 250 bar, with operation beginning at 12 bar when the spring-centered design is used. Continuous backpressure at port T is permitted up to 210 bar, protecting the return line against overload. Switching time can be tuned through discharge control identified as option S2, enabling adaptation to different cycle requirements. The moving mass involved in this adjustment is 0.8 kg, influencing response speed during spool shifts.
Technical Specifications
Electrical Connector
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (ng10, Symbol H)
160 l/min
Max Operating Pressure (p, A, B)
350 bar
Max Pilot Pressure
250 bar
Max Pressure At Port T (dc)
210 bar
Min Pilot Pressure (spring-centered)
12 bar
Mounting Screw Thread
M6 x 45
Mounting Screw Torque
12.5 Nm
Nominal Size (ng)
10
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-05-05-0-05
Switching Time Adj. Mass
0.8 kg
Switching Time Adjustment
Discharge Control (S2)
1620 Old Apex Road
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