Bosch Rexroth | 4WEH16Y7X6EG24N9ETK4B10-CSA
4WEH16Y7X/6EG24N9ETK4/B10 CSA
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The 4WEH16Y7X/6EG24N9ETK4/B10 CSA directional spool valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth for hydraulic automation where controlled flow paths are needed. With a nominal size of NG16, it fits manifolds laid out to the ISO 4401-07-07-0-05 porting pattern to support mid-range actuator circuits. The valve tolerates operating pressures up to 280 bar at ports P, A, and B so cylinders may be driven without external pressure reducers, while a rated flow capacity of 250 l/min at that pressure maintains response in large-volume lines. Fluid viscosity from 2.8 to 500 mm²/s is permissible, and temperatures between –20 °C and +80 °C are acceptable when nitrile seals are used. Contamination limits are defined by ISO 4406 class 20/18/15, and a 1.0 mm throttle insert supplied under code B10 moderates inlet surges when required.
Pilot functions are fully self-contained; supply oil is taken internally from port P and returned internally to tank via port T, so external pilot hoses are unnecessary. The pilot stage is energized by a 24 V DC solenoid, and the wiring meets DIN EN 175301-803 form K4 to standardize connector selection. Pilot pressure may reach 250 bar while the internal return path withstands 210 bar, enabling the valve to shift reliably under high back-pressure conditions. For two-spool arrangements with spring return, actuation begins once 14 bar pilot pressure is achieved. A concealed manual override identified by code N9 lets maintenance staff reposition the spool without removing the coil. These features make the valve suitable for compact power units where electrical actuation, hidden override, and high pilot capability are required.
Technical Specifications
Cleanliness Class
ISO 4406 (20/18/15)
Electrical Connection
DIN EN 175301-803 (K4)
Hydraulic Fluid Temp Range (nbr)
-20 to +80 C
Manual Override
Concealed (N9)
Max Flow (y, 280 Bar)
250 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (internal, Dc)
210 bar
Min Pilot Pressure (2-spool, Spring End)
14 bar
Nominal Size
NG16
Pilot Return
Internal (T)
Pilot Solenoid Voltage
24 V DC
Pilot Supply
Internal (P)
Porting Pattern
ISO 4401-07-07-0-05
Throttle Insert Orifice
1.0 mm (B10)
Viscosity Range
2.8 to 500 mm²/s
1620 Old Apex Road
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