Bosch Rexroth | 4WEH16EA7X6EW110N9ETK4B10
4WEH16EA7X/6EW110N9ETK4/B10
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The 4WEH16EA7X/6EW110N9ETK4/B10 valve is built by Bosch Rexroth as part of the WEH Directional Spool Valves series. It directs hydraulic flow in automation circuits; electro-hydraulic actuation allows a low-power pilot stage to shift the main spool when electric control signals are present. The 4-way design provides two service ports plus pressure and tank lines for reversible actuator movement. A nominal size of 16 gives passage dimensions compatible with NG16 subplates, while the ISO 4401-07-07-0-05 porting pattern ensures standardized mounting. The E-coded spool with actuating side a defines the overlap and metering edges required for proportional acceleration of connected cylinders or motors. Internal pilot oil is drawn from P and returned to T so no external pilot plumbing is needed. With a performance limit of 300 l/min, the valve sustains fast cycle rates, and a maximum operating pressure of 280 bar permits use in high-pressure machinery without loss of sealing integrity.
Control hardware is connected through a DIN EN 175301-803 K4 plug, enabling quick replacement during maintenance. A concealed manual override labeled N9 lets technicians stroke the spool mechanically for troubleshooting without exposing moving parts. The pilot stage tolerates pressures up to 250 bar, while spring-centered operation requires at least 14 bar to shift reliably; these limits help designers size the upstream pressure reducing valve. The spring chamber volume of 5.72 cm³ must be filled during each actuation, influencing response time in rapid sequencing units. A throttle insert with a 1.0 mm orifice marked B10 can be placed in the P-port to damp pressure surges and prevent shock loads on the pilot circuit. The assembled unit weighs 8.9 kg, light enough for horizontal manifold mounting yet robust for industrial vibration levels.
Technical Specifications
Actuation Type
Electro-Hydraulic
Electrical Connector
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (spring-centered)
14 bar
Nominal Size (ng)
16
Performance Limit Flow (ng16, E)
300 l/min
Pilot Oil Return
Internal (to T)
Pilot Oil Supply
Internal (from P)
Pilot Volume (spring-centered)
5.72 cm3
Porting Pattern
ISO 4401-07-07-0-05
Spool Symbol
E (Actuating Side a)
Throttle Insert
Ø1.0 mm (B10)
Way Configuration
4-way
Weight
8.9 kg
1620 Old Apex Road
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