Bosch Rexroth | 4WEH16D7X6EG96N9ETS2K4B08
4WEH16D7X/6EG96N9ETS2K4/B08
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The 4WEH16D7X/6EG96N9ETS2K4/B08 valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth for hydraulic automation loops that require dependable flow direction control. It uses electro-hydraulic actuation, so an energized solenoid shifts a hydraulically piloted spool to change circuit paths. The unit is built in nominal size NG16, matching ISO 4401-07-07-0-05 mounting, and its 4-way layout provides pressure, tank, and two work ports for bidirectional actuator movement. Internal pilot supply feeds the control stage while an internal pilot return channels fluid back without external lines, reducing plumbing complexity. Ports P, A, and B withstand up to 280 bar, allowing the valve to manage high-pressure power circuits in presses or injection machines. With a single solenoid installed the assembly weighs 8.5 kg, a figure relevant for manifold loading calculations and service handling.
Hydraulic oil entering this model must meet ISO 4406 cleanliness class 20/18/15 to protect the precision spool lands from wear. Electrical connection is provided through a DIN EN 175301-803 K4 plug, ensuring quick coil replacement during maintenance. A concealed manual override identified by code N9 permits local actuation without exposing moving parts. The pilot stage tolerates pressures up to 250 bar, while the internal drain line at port Y is limited to 210 bar, boundaries that safeguard seals. For spring-centerless versions, the spool starts to shift once pilot pressure reaches 14 bar, guaranteeing prompt reaction at low control pressures. Discharge-control trimming marked S2 lets the user fine-tune switching times, and a throttle insert with a 0.8 mm orifice labeled B08 can be fitted to moderate pilot flow and dampen shock. Combined, these features give the valve adaptable timing and reliable operation across varied load conditions.
Technical Specifications
Actuation
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port Y (internal, Dc)
210 bar
Min Pilot Pressure (2-pos Spring)
14 bar
Nominal Size
NG16
Pilot Return
Internal (ET)
Pilot Supply
Internal (ET)
Porting Pattern
ISO 4401-07-07-0-05
Switching Time Adjustment
Discharge Control (S2)
Throttle Insert
Ø 0.8 mm (B08)
Ways
4-Way
Weight (1 Solenoid)
8.5 kg
1620 Old Apex Road
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