Bosch Rexroth | 4WEH22H7X6EW110N9ETDAB10
4WEH22H7X/6EW110N9ETDA/B10
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The 4WEH22H7X/6EW110N9ETDA/B10 directional spool valve is manufactured by Bosch Rexroth within the WEH Directional Spool Valves series and serves as a switching element in hydraulic automation circuits. It is built to the NG25 (W.H 22) size, giving it a standardized mounting footprint, and its 4/2-way configuration supplies two stable positions for four working ports. The spool carries the D symbol, which defines the internal flow pattern, and it returns to rest by a hydraulic end-position mechanism rather than mechanical springs. Pilot oil is routed through internal supply and internal return passages, reducing external lines. Spool actuation begins once the pilot line reaches a minimum of 8 bar, while the pilot stage tolerates pressures up to 210 bar; its return line withstands 160 bar during AC operation.
The working ports p, A, and B are rated for 350 bar, enabling use in high-pressure systems, and the body passes up to 450 l/min without exceeding allowable pressure drops. Mineral oil HLP conforming to DIN 51524 is the specified hydraulic medium, and fluid cleanliness must meet ISO 4406 class 20/18/15 to avoid abrasion of the spool lands. A 1.0 mm throttle insert identified as B10 can be installed to meter pilot flow. Interface dimensions follow the ISO 4401-08-08-0-05 porting pattern so the valve mates with standard subplates. Mounting requires six M12 × 60 screws, each tightened to 100 Nm to ensure a secure seal between the valve and manifold.
Technical Specifications
Fluid Cleanliness Class
ISO 4406 20/18/15
Hydraulic Fluid
Mineral Oil HLP (DIN 51524)
Max Flow (hd)
450 l/min
Max Pilot Pressure
210 bar
Max Pilot Return Pressure (internal)
160 bar (AC)
Max Pressure (p, A, B)
350 bar
Min Pilot Pressure (hydraulic End)
8 bar
Mounting Screw Torque
100 Nm
Mounting Screws
6 × M12 × 60
Pilot Oil Circuit
Internal Supply/Internal Return
Porting Pattern
ISO 4401-08-08-0-05
Spool Return Type
Hydraulic End Position
Spool Symbol
D
Throttle Insert
Ø1.0 mm (B10)
Valve Configuration
4/2-Way
Valve Size
NG25 (W.H 22)
1620 Old Apex Road
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