Bosch Rexroth | 4WEH16E7X6EG24N9ES2K4B10
4WEH16E7X/6EG24N9ES2K4/B10
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The 4WEH16E7X/6EG24N9ES2K4/B10 directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and operates as a hydraulic switching element in automated circuits. A 4-way flow path lets it connect pressure, return, and two work ports for bidirectional actuator control. The E type three-position spool is spring-centered, providing a defined neutral state for safe stop conditions. Port size NG16 accommodates up to 300 l/min, matching medium-capacity systems while keeping pressure loss moderate. Main ports tolerate 280 bar so the unit can work with high-pressure pumps used in presses or molding machines. Internal pilot oil supply removes the need for an external pilot line, and the spool begins to shift once pilot pressure reaches 14 bar. Solenoid actuation is rated for 24 V DC, and wiring is completed through a DIN EN 175301-803 K4 connector for quick interchange during maintenance.
The valve bolts to subplates machined to ISO 4401-07-07-0-05, ensuring direct exchange with other NG16 components in a manifold. A 1.0 mm throttle insert designated B10 can be fitted to limit pilot flow and soften switching transients. Pilot passages withstand up to 250 bar, and the return gallery may rise to 210 bar, enabling closed-loop exhaust layouts in compact power units. External surfaces receive a 100 µm protective coating that resists corrosion in oil-laden environments. System oil should meet ISO 4406 cleanliness class 20/18/15 to protect the finely ground spool from wear. The WEH design delivers a mean time to dangerous failure of 100 years, supporting long safety intervals in machinery with high duty cycles.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Max Flow (spool E, Ng16)
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (y)
210 bar
Min Pilot Pressure (spring-centered)
14 bar
Mounting Interface
ISO 4401-07-07-0-05
Mttfd (type Weh)
100 years
Nominal Voltage
24 V DC
Pilot Oil Supply
Internal (E)
Size
NG16
Spool Type
E (3-Position)
Surface Coating Thickness
100 µm
Throttle Insert
1.0 mm (B10)
Way Configuration
4-Way
1620 Old Apex Road
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