Bosch Rexroth | 4WEH22C7X6EW110N9ES2DALB10
4WEH22C7X/6EW110N9ES2DAL/B10
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The 4WEH22C7X/6EW110N9ES2DAL/B10 valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth for hydraulic automation. It routes pressure and return flow to actuators in automated systems. Its nominal size is NG25, which defines the port envelope for 25 mm interfaces on the subplate. A maximum flow capacity of 450 l/min allows the valve to handle high volume circuits. The unit tolerates up to 350 bar operating pressure so it can be used in high-pressure systems. Pilot oil is supplied internally through port X, eliminating an external pilot line. Spool shift begins once the pilot circuit reaches the minimum pressure of 4.5 bar, and it must not exceed the pilot limit of 210 bar to protect the control stage. The ISO 4401 porting pattern aligns the valve with standardized manifolds, while subplate mounting provides quick replacement without disturbing pipe work.
Six M12 × 60 screws secure the housing to the manifold, and each fastener requires a tightening torque of 100 Nm to maintain sealing integrity. Pilot oil returns externally through port Y so back pressure in the main return line does not affect the control chamber. A D3 pressure reducing valve is built into the pilot stage to stabilize pilot pressure during load changes. Switching time adjustment code S2 lets the user fine tune spool movement for application-specific response. A throttle insert with a 1.0 mm bore, identified as B10, meters pilot flow to smooth actuation. The surface coating is applied up to 100 µm thick to resist corrosion. The mean time to dangerous failure (Mttfd) is rated at 100 years, indicating long functional reliability for safety calculations.
Technical Specifications
Maximum Flow
450 l/min
Maximum Operating Pressure
350 bar
Maximum Pilot Pressure
210 bar
Minimum Pilot Pressure (x Internal)
4.5 bar
Mounting Screws
M12 x 60 (6 pcs)
Mounting Type
Subplate
Mttfd (type Weh)
100 years
Nominal Size
NG25
Pilot Oil Return
External (Y)
Pilot Oil Supply
Internal (X)
Porting Pattern
ISO 4401
Pressure Reducing Valve
D3
Screw Tightening Torque
100 Nm
Surface Coating Thickness
100 µm (max)
Switching Time Adjustment
S2
Throttle Insert Size
Ø1.0 mm (B10)
1620 Old Apex Road
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