Bosch Rexroth | 4WEH16E7X6EW110N9S2DA
4WEH16E7X/6EW110N9S2DA
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The 4WEH16E7X/6EW110N9S2DA valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth. It is a 4-way electro-hydraulic unit that switches hydraulic flow paths in automated motion circuits. The ISO 4401-07-07-0-05 porting pattern allows direct mounting on standardized subplates, while the nominal size NG16 establishes passage dimensions for medium-frame manifolds. The pilot arrangement lets a small control pressure move the spool so that main flow is routed without large solenoids. The assembly tolerates a maximum operating pressure of 280 bar at ports P, A, and B, giving it capacity for high-pressure drives. A rated flow of 300 l/min under symbol E supports rapid cylinder or motor movement. Spring-centered models require at least 14 bar pilot pressure to shift, ensuring reliable centering when the signal is removed.
The pilot stage can accept up to 250 bar, and return port T withstands 250 bar so back-pressure in the tank line does not impair operation. Port Y for ac solenoids is limited to 160 bar, protecting the drain circuit from overload. A cleanliness class of 20/18/15 per ISO 4406 is required to prevent wear in the precision spool bore. A concealed manual override identified by code N9 permits emergency actuation without exposing moving parts. Switching time can be tuned with a discharge orifice marked S2, allowing response adjustments during commissioning. Installation uses four M10 × 60 screws to ISO 4762 tightened to 58 Nm, providing secure seating against the manifold. The design achieves a mean time to dangerous failure of 100 years, supporting long-term reliability targets in continuous-duty automation.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class (iso 4406)
20/18/15
Manual Override
Concealed (N9)
Max Flow (symbol E, Ng16)
300 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port T
250 bar
Max Pressure Port Y (ac Solenoids)
160 bar
Min Pilot Pressure (spring-centered)
14 bar
Mounting Screw Torque
58 Nm
Mounting Screws
4x M10 x 60 (ISO 4762)
Mttfd (type Weh)
100 years
Nominal Size
NG16
Porting Pattern
ISO 4401-07-07-0-05
Switching Time Adjustment
Discharge (S2)
Way Configuration
4-Way
1620 Old Apex Road
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