Bosch Rexroth | 4WEH22H7X6EG12N9DA-CSA
4WEH22H7X/6EG12N9DA CSA
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The 4WEH22H7X/6EG12N9DA CSA belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth for hydraulic automation circuits that require controlled flow paths. It is configured as a 4-way valve so that four ports can be interconnected in predefined ways during operation. The size is NG25, giving passage dimensions aligned with medium to high flow lines, and the porting pattern follows ISO 4401-08-08-0-05 to match standardized manifolds. Two spool positions identified by symbol D allow the actuator to shift between only two discrete states. A hydraulic spool return brings the element back to its neutral position without external springs, while a high-power 6E pilot control valve drives rapid shifts. Pilot oil is supplied and drained through external lines, and a minimum pilot pressure of 8 bar is required to move the main spool.
The assembly tolerates system pressures up to 350 bar and passes a maximum flow of 450 l/min, enabling use in high-demand power units. Pilot channels may reach 210 bar, giving ample margin between command pressure and main line pressure. To maintain internal clearances, operating fluid must meet ISO 4406 class 20/18/15 cleanliness. A concealed N9 manual override lets technicians reposition the spool when electrical or pilot power is absent. Installation uses six M12 × 60 screws per ISO 4762, and each screw must be tightened to 100 Nm to hold the valve against its subplate without leakage.
Technical Specifications
Control Spool Return
Hydraulic
Fluid Cleanliness
ISO 4406 20/18/15
Manual Override
Concealed (N9)
Max Flow
450 l/min
Max Operating Pressure
350 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure
8 bar
Mounting Screws
6x M12 x 60 (ISO 4762)
Pilot Control Valve
High-Power (6E)
Pilot Oil Flow
External Supply And Return
Porting Pattern
ISO 4401-08-08-0-05
Screw Tightening Torque
100 Nm
Size
NG25
Spool Positions
2 (Symbol D)
Valve Configuration
4-Way
1620 Old Apex Road
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