Bosch Rexroth | 4WEH22HD7XOF6EW110N9ETK4B10
4WEH22HD7X/OF6EW110N9ETK4/B10
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The 4WEH22HD7X/OF6EW110N9ETK4/B10 valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth for controlling actuator motion in hydraulic automation. It is a size 25 four-way, two-position unit that employs a D-coded spool to route pressure and tank lines as required. The pilot stage is a type 6E arrangement with internal oil supply and internal return, so no external pilot lines are needed. A hydraulic mechanism resets the control spool to its rest position once the solenoid is de-energized, and the pilot stage starts shifting at a minimum pressure of 8 bar. Rated flow reaches 450 L/min, enabling the valve to serve high-capacity circuits without excessive pressure loss.
System limits include a working pressure up to 350 bar on ports P, A, and B, while the pilot circuit tolerates as much as 210 bar. A 1.0 mm throttle insert moderates inlet flow for smoother spool movement under varying loads. Contamination sensitivity is defined by cleanliness class ISO 4406 20/18/15, so filtration must hold particle counts within that range. Electrical actuation is achieved through a DIN EN 175301-803 connector coded K4, and a concealed N9 manual override lets maintenance staff shift the valve locally when power is absent. Port faces follow the ISO 4401 pattern to mate with standard sub-plates or manifolds.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Control Spool Return
Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Maximum Flow (ng25 W.h 22)
450 l/min
Maximum Operating Pressure (p, A, B)
350 bar
Maximum Pilot Pressure
210 bar
Minimum Pilot Pressure (hydraulic End)
8 bar
Pilot Oil Return
Internal
Pilot Oil Supply
Internal
Pilot Valve Type
6E
Porting Pattern
ISO 4401
Spool Symbol
D
Throttle Insert
Ø 1.0 mm
Valve Function
4/2-Way
Valve Size (ng)
25
1620 Old Apex Road
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