Bosch Rexroth | 4WEH22E7X6EW110N9TDAB08
4WEH22E7X/6EW110N9TDA/B08
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The 4WEH22E7X/6EW110N9TDA/B08 directional spool valve is produced by Bosch Rexroth and belongs to the WEH Directional Spool Valves series. Its electro-hydraulic actuation combines an electrical pilot stage with hydraulic force to shift the main spool, allowing remote command in automated circuits. A 4-way flow path directs pressure and return lines to two actuator ports, supporting bidirectional cylinder or motor control. Nominal size NG25 aligns with the ISO 4401-08-08-0-05 port pattern, so the valve fits standard subplate mountings without additional machining. A maximum flow rating of 450 l/min accommodates high-volume systems, and main ports withstand operating pressures up to 280 bar to suit heavy-duty equipment.
The valve uses a high-power pilot stage that delivers strong shifting force, driven by a wet-pin solenoid whose immersed armature improves cooling and extends coil life. Pilot pressure can vary between 10.5 bar and 210 bar, giving designers flexibility in selecting control line settings. A 0.8 mm throttle insert stabilizes pilot flow, preventing pressure peaks during spool movement. A concealed manual override lets maintenance staff reposition the spool when electrical power is absent while keeping dirt away from internal parts. NBR sealing elements tolerate common mineral oil hydraulics and limit leakage over long service intervals. The mean time to dangerous failure is specified at 100 years, contributing to high safety availability in stationary machinery.
Technical Specifications
Actuation Type
Electro-Hydraulic
Manual Override
Concealed
Max Flow
450 l/min
Max Operating Pressure
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure
10.5 bar
Mounting Type
Subplate
Mttfd
100 years
Nominal Size
NG25
Pilot Valve Type
High-Power
Porting Pattern
ISO 4401-08-08-0-05
Seal Material
NBR
Solenoid Type
Wet-Pin
Throttle Insert
Ø0.8 mm
Way Configuration
4-Way
1620 Old Apex Road
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