Bosch Rexroth | 4WEH16W7X6EG24N9ETS2K4B10
4WEH16W7X/6EG24N9ETS2K4/B10
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The 4WEH16W7X/6EG24N9ETS2K4/B10 directional spool valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth. It directs hydraulic flow to actuators in automated machinery and relies on an NG16 nominal size body matched to the ISO 4401-07-07-0-05 porting pattern for straightforward manifold mounting. The valve passes up to 300 l/min while containing system pressure at 280 bar on ports P, A, and B. A solenoid rated for 24 V DC energizes the spool; wiring terminates through a DIN EN 175301-803 plug coded K4. Internal pilot supply and return (designation ET) simplify installation because no external pilot lines are required. Switching speed can be trimmed with the S2 discharge control so cycle times suit the machine sequence. A concealed manual override identified by N9 allows the operator to reposition the spool during commissioning or in case of power loss.
Fluid cleanliness must reach ISO 4406 code 20/18/15 to protect the precision lands and ensure reliable service life. The pilot stage tolerates pressures up to 250 bar and returns oil to tank at 210 bar, while port T can withstand 250 bar, so the valve suits high-pressure circuits with internal drain. Spring-centered actuation needs a minimum pilot pressure of 14 bar to shift the spool fully into its working positions. A throttle insert with a 1.0 mm orifice, tagged B10, can be fitted to moderate flow and damp pressure surges. When the spool rests in neutral, only 6 mm² of cross-section remains open between work ports and tank, limiting leakage and holding loads. These hydraulic features ensure accurate, repeatable switching under variable operating conditions.
Technical Specifications
Cleanliness Class
20/18/15 (ISO 4406)
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return (y Internal, Dc)
210 bar
Max Pressure Port T
250 bar
Min Pilot Pressure (spring-centered)
14 bar
Nominal Size
NG16
Pilot Supply/return
Internal (ET)
Porting Pattern
ISO 4401-07-07-0-05
Rated Voltage
24 V DC
Switching Time Adjustment
Discharge Control (S2)
Throttle Insert
Ø1.0 mm (B10)
Zero-pos Cross-section (w, A–t; B–t)
6 mm²
1620 Old Apex Road
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