Bosch Rexroth | 4WEH10D4X6EG24N9ETK4B10V
4WEH10D4X/6EG24N9ETK4/B10V
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The 4WEH10D4X/6EG24N9ETK4/B10V directional spool valve is built by Bosch Rexroth for the WEH Directional Spool Valves series and serves to switch pressurized oil paths in automated hydraulic circuits. Its nominal size is NG10, which matches standard subplates of that dimension and sets the envelope for flow channels. A four-way layout provides separate pressure, tank, and dual work ports so actuators can be driven in both directions. The solenoid is energized with 24 V DC, allowing the valve to be wired directly to common machine control voltages. Connection is made through a DIN EN 175301-803 plug, giving a quick-disconnect interface for field service. A concealed manual override lets maintenance staff shift the spool when power is absent while keeping the actuator protected from dirt. Internal pilot oil supply draws control pressure from the main P port, and the return flow is also routed internally to simplify plumbing. The spool responds once pilot pressure reaches 10 bar in two-spool configurations, and the pilot stage tolerates up to 250 bar before relief measures are required.
For mounting, the valve follows the ISO 4401-05-05-0-05 porting pattern, ensuring bolt-on interchangeability with other NG10 manifolds. It can pass up to 160 l/min, permitting medium-to-high flow applications without excessive pressure drop. System pressure at the P, A, and B ports may reach 280 bar, allowing the unit to handle typical industrial work circuits. FKM seals provide compatibility with standard mineral oils and many synthetic fluids at elevated temperatures. A 1.0 mm throttle insert stabilizes pilot flow and damps transient pressure peaks. Oil cleanliness must remain at ISO 4406 20/18/15 or better so the spool lands stay free of abrasive wear. The predicted mean time to dangerous failure for this WEH type is 100 years, supporting long service intervals in safety-related assemblies.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803
Manual Override
Concealed
Max Flow (ng10)
160 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (2-spool)
10 bar
Mttfd (type Weh)
100 years
Nominal Size
NG10
Pilot Oil Return
Internal
Pilot Oil Supply
Internal
Porting Pattern
ISO 4401-05-05-0-05
Seal Material
FKM
Supply Voltage
24 V DC
Throttle Insert
Ø 1.0 mm
Way Configuration
4-Way
1620 Old Apex Road
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