Bosch Rexroth | 4WEH22D7X6EG24N9EK4B12-CSA
4WEH22D7X/6EG24N9EK4/B12 CSA
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The 4WEH22D7X/6EG24N9EK4/B12 CSA valve is part of the WEH Directional Spool Valves series from Bosch Rexroth and directs pressurized oil to selected actuator ports in automated hydraulic circuits. It installs on a subplate that uses the ISO 4401-08-08-0-05 porting pattern, allowing a straightforward exchange within standardized manifolds. The valve withstands up to 280 bar on ports P, A, and B, while the tank port is permitted to reach 250 bar; an externally drained pilot return at port Y is limited to 210 bar. Fluid viscosities between 2.8 and 500 mm²/s and temperatures from –20 to +80 °C are acceptable, which supports a wide range of mineral-based or synthetic oils. These limits let the spool maintain predictable switching times across diverse machine operating conditions.
Control signals reach the single solenoid through a DIN EN 175301-803 K4 connector, and the complete solenoid assembly brings the unit weight to 11.5 kg, allowing rigid mounting without extra brackets. The valve functions reliably in ambient temperatures from –20 to +50 °C so it can be located near power units or on exposed machinery frames. A built-in 1.2 mm throttle insert designated B12 moderates pilot flow to prevent unwanted spool movement during pressure transients. System filtration must achieve an ISO 4406 cleanliness class of 20/18/15 to protect the precision-ground lands from abrasion. The calculated mean time to dangerous failure for the WEH type reaches 100 years, confirming suitability for safety-related service where long life and consistent directional control are mandatory.
Technical Specifications
Ambient Temperature Range (standard)
-20 to +50 C
Cleanliness Class (iso 4406)
20/18/15
Electrical Connector
DIN EN 175301-803 (K4)
Hydraulic Fluid Temp Range (nbr Seals)
-20 to +80 C
Max Operating Pressure (p/a/b)
280 bar
Max Pilot Return Port Y Pressure (external)
210 bar
Max Tank Port Pressure
250 bar
Mounting Type
Subplate Mounting
Mttfd (type Weh)
100 years
Porting Pattern
ISO 4401-08-08-0-05
Throttle Insert
1.2 mm (B12)
Viscosity Range
2.8 to 500 mm2/s
Weight (1 Solenoid)
11.5 kg
1620 Old Apex Road
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