Bosch Rexroth | 4WEH22G7X6EW110N9EK4B10
4WEH22G7X/6EW110N9EK4/B10
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The 4WEH22G7X/6EW110N9EK4/B10 directional spool valve is produced by Bosch Rexroth in the WEH Directional Spool Valves series. It directs hydraulic oil within automated machinery. Valve size NG25 ("W.H 22") provides a port dimension suitable for medium-flow manifolds, and the 4-Way function creates four discrete flow paths needed for cylinder advance and retract circuits. Spool type G defines the metering edges that establish the flow symbol used during system design. The porting pattern ISO 4401-08-08-0-05 aligns the valve with standard subplates for quick installation. Electrical connection DIN EN 175301-803 K4 offers a plug-in interface for the two solenoids. A weight of 11.9 kg with both solenoids must be considered during manifold support design. The integrated throttle insert with a 1.0 mm orifice (B10) restricts pilot flow to damp switching shocks. Hydraulic fluid cleanliness of 20/18/15 according to ISO 4406 is required to protect the precision spool surfaces.
The valve passes up to 180 l/min at 350 bar with the G spool, allowing it to serve high-demand actuators. Maximum operating pressure of 280 bar on ports P, A, and B limits system settings to safe levels, while port T can handle 250 bar during pressure peaks. Port Y is rated to 160 bar, providing a separate drain path for pilot oil without risking seal damage. Pilot oil is supplied externally through port X so main flow is not diverted from service lines, and it is returned externally through port Y to avoid back-pressure in the pilot stage. A maximum pilot pressure of 210 bar ensures reliable solenoid actuation, and a minimum pilot pressure of 10.5 bar is needed to recenter the spring-centered spool. These pressure limits coordinate system design so the directional valve shifts consistently under varying load conditions.
Technical Specifications
Cleanliness Class
20/18/15 (ISO 4406)
Electrical Connection
DIN EN 175301-803 K4
Max Flow (symbol G, 350 Bar)
180 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
210 bar
Max Pressure Port T
250 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Port Y Max Pressure (ac)
160 bar
Porting Pattern
ISO 4401-08-08-0-05
Spool Type
G
Throttle Insert
Ø 1.0 mm (B10)
Valve Size
NG25 ("W.H 22")
Way Function
4-Way
Weight (2 Solenoids)
11.9 kg
1620 Old Apex Road
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