Bosch Rexroth | 4WEH16H7X6EG96N9ETS2K4B10P4-5D3
4WEH16H7X/6EG96N9ETS2K4/B10P4 5D3
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The 4WEH16H7X/6EG96N9ETS2K4/B10P4 5D3 valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic flow in automated equipment through an electro-hydraulic pilot stage that shifts the main spool. The NG16 size establishes the flow rating for circuits in the medium pressure range. Electro-hydraulic actuation minimizes electrical power while leveraging pilot oil to move the spool. An ISO 4401 porting pattern matches common subplates for straightforward installation. The DIN EN 175301-803 (K4) connector forms the sealed electrical interface to the solenoid. Internal pilot supply and internal pilot return eliminate separate external lines. A hydraulic main spool return brings the spool to neutral when the command is removed. The valve withstands 280 bar on ports P, A, and B, and a pilot flow of 35 l/min achieves the shortest switching time.
Pilot circuit limits define operating boundaries for the same valve. The pilot stage accepts pressures up to 250 bar while still requiring at least 4.5 bar to function. A pressure reduction of 45 bar is applied across the pilot gallery to protect the control components. The preload element opens at a cracking pressure of 4.5 bar to start flow through the reduction path. A throttle insert with a 1.0 mm diameter, coded B10, meters pilot oil and moderates transient flow. Four M10 × 60 bolts secure the body, and each fastener must be tightened to 58 Nm to preserve the seal against the subplate. These mounting figures align the housing accurately with the ISO pattern. The defined fastener torque, pilot thresholds, and throttling orifice combine to determine reliable directional control in hydraulic automation.
Technical Specifications
Actuation Type
Electro-Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Main Spool Return
Hydraulic
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (internal)
4.5 bar
Mounting Screw Torque (m10)
58 Nm
Mounting Screws
4× M10 × 60
Pilot Flow (shortest Switching Time)
35 l/min
Pilot Pressure Reduction (d3)
45 bar
Pilot Return
Internal (ET)
Pilot Supply
Internal (ET)
Porting Pattern
ISO 4401
Preload Valve Cracking Pressure
4.5 bar
Throttle Insert Diameter
1.0 mm (B10)
Valve Size
NG16
1620 Old Apex Road
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