Bosch Rexroth | 4WEH22J7X6EW110N9ETK4B10V
4WEH22J7X/6EW110N9ETK4/B10V
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The 4WEH22J7X/6EW110N9ETK4/B10V valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and is used to route pressurized fluid in automated hydraulic circuits. It is an electro-hydraulic unit that shifts a 4-way spool, giving three selectable flow paths that are returned to center by springs when the solenoids are de-energized. The valve mounts on an ISO 4401-08-08-0-05 interface and occupies the NG25 size, fitting common manifolds in power units. Pilot oil is supplied internally through port ET, while the spent pilot flow is returned internally to port T, removing the need for external lines. Electrical energizing is handled through a DIN EN 175301-803 K4 connector so field wiring remains standardized. The design includes an FKM seal set for compatibility with higher-temperature or chemically aggressive fluids, and a 1.0 mm throttle insert is provided to limit pilot flow and damp switching shocks.
The hydraulic section passes up to 450 l/min when operating with spool symbol J, supporting large actuators without excessive pressure drop. Working ports P, A, and B withstand continuous pressures to 280 bar, while the tank port T is rated for 250 bar, allowing high-power circuits with minimal risk of case leakage. The pilot stage functions between 10.5 bar and 210 bar, so control logic can be derived from low-pressure auxiliary pumps or the main line as required. A maximum pilot pressure of 210 bar keeps the solenoid operator within safe mechanical limits, and the 10.5 bar minimum ensures reliable spool movement against the return springs. By combining these pressure ratings with its internal pilot arrangement, the valve maintains stable response across varied load conditions. Altogether, the flow capacity, pressure limits, and pilot range define the operating envelope for this NG25 directional unit in industrial automation.
Technical Specifications
Actuation
Electro-Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Max Flow (symbol J)
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pressure (port T)
250 bar
Maximum Pilot Pressure
210 bar
Minimum Pilot Pressure
10.5 bar
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (ET)
Porting Pattern
ISO 4401-08-08-0-05
Seal Material
FKM
Size
NG25
Spool Positions
3 Positions
Spool Return
Springs
Throttle Insert
Ø 1.0 mm
Way Configuration
4-Way
1620 Old Apex Road
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