Bosch Rexroth | 4WEH22D7X6EW110N9ETDK23LB10V-AN
4WEH22D7X/6EW110N9ETDK23L/B10V AN
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The 4WEH22D7X/6EW110N9ETDK23L/B10V AN directional valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series and is used to switch hydraulic flow paths in automated machinery. It is built in size 25, placing it among large mounting patterns for main pressure lines. The design offers two spool positions so circuits can be shifted between discrete flow states. Service ports P, A, and B tolerate up to 280 bar, and the D-symbol spool passes 450 l/min to support high actuator speeds. Pilot oil is supplied and returned internally, which removes the need for external pilot hoses. A minimum pilot pressure of 11 bar is required to move the spool against the spring, and each actuation consumes 15.28 cm³ of pilot oil. The hydraulic medium must meet ISO 4406 cleanliness class 20/18/15 to protect the sliding surfaces from contamination.
The pilot stage withstands 210 bar, while an external return through port Y can carry up to 250 bar without leakage. A fixed 1.0 mm throttle orifice meters pilot flow to damp switching shocks. Interface geometry follows the ISO 4401-08-08-0-05 pattern so the valve mates with the correct subplate. Six M12 × 60 screws, specified by ISO 4762, secure the body, and each screw must be tightened to 100 Nm to maintain joint integrity. Fluoroelastomer sealing rings made of FKM resist mineral oils and elevated temperatures. The single-solenoid version weighs 11.5 kg, which influences handling and support during installation.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Max Flow (symbol D)
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Max Pressure (pilot Return Y Ext.)
250 bar
Min Pilot Pressure (2-spool, Spring End)
11 bar
Mounting Screws
6x M12 x 60 (ISO 4762)
Pilot Oil Supply/return
Internal (ET)
Pilot Volume Per Switch (2-spool)
15.28 cm3
Porting Pattern
ISO 4401-08-08-0-05
Screw Tightening Torque
100 Nm
Seal Material
FKM
Size (ng)
25
Spool Positions
2
Throttle Orifice
1.0 mm
Weight (1 Solenoid)
11.5 kg
1620 Old Apex Road
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