Bosch Rexroth | 4WEH22HD7XOF6EG24N9ETK4B10
4WEH22HD7X/OF6EG24N9ETK4/B10
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The 4WEH22HD7X/OF6EG24N9ETK4/B10 valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth to direct hydraulic flow in automated machinery. It is sized NG25 and follows the ISO 4401-08-08-0-05 porting pattern for subplate mounting. A maximum flow rate of 450 l/min permits high-capacity circuits, while ports p, A, and B tolerate up to 280 bar and the t port up to 250 bar. Internal pilot oil supply and return (ET) remove the need for external lines, and the spool reaches its hydraulic end position once pilot pressure exceeds 8 bar. System fluid must stay cleaner than ISO 4406 class 20/18/15 to avoid wear on the metering edges. A Ø 1.0 mm throttle insert marked B10 can be installed to restrict pilot oil flow when required.
The pilot solenoid operates on 24 V DC and connects through a DIN EN 175301-803 K4 plug. A pilot control pressure of up to 210 bar shifts the spool, and the internal pilot return path withstands the same 210 bar limit. Six M12 × 60 screws compliant with ISO 4762 fasten the valve, each tightened to 100 Nm within a ±10 % range to maintain the seal. Functional safety is supported by a mean time to dangerous failure of 100 years according to EN ISO 13849, extending maintenance intervals in critical installations.
Technical Specifications
Cleanliness Class (iso 4406)
20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Max Flow (hd 2-spool, Ng25)
450 l/min
Max Pilot Pressure
210 bar
Max Pilot Return Pressure (internal)
210 bar
Max Pressure (p, A, B)
280 bar
Max Pressure (t Port)
250 bar
Min Pilot Pressure (hydraulic End Pos.)
8 bar
Mounting Screws
6× M12 × 60 (ISO 4762)
Mttfd (en Iso 13849)
100 years
Pilot Oil Configuration
Internal Supply/Return (ET)
Porting Pattern
ISO 4401-08-08-0-05
Rated Voltage (pilot Solenoid)
24 V DC
Screw Tightening Torque
100 Nm (±10%)
Size
NG25
Throttle Insert
Ø 1.0 mm (B10)
1620 Old Apex Road
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