Bosch Rexroth | 4WEH22L7X6EW110N9TDAB08
4WEH22L7X/6EW110N9TDA/B08
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The 4WEH22L7X/6EW110N9TDA/B08 directional spool valve is manufactured by Bosch Rexroth as part of the WEH Directional Spool Valves series. It routes hydraulic flow for automated machinery and employs a pilot stage to shift the main spool. The valve is supplied in size NG25 (W.H 22), and its mounting face matches the ISO 4401-08-08-0-05 pattern. A rated flow capacity of 450 l/min supports high-volume circuits, while pressure at ports P, A, and B can reach 280 bar; port T is limited to 160 bar. The device maintains consistent performance with fluids between 2.8 and 500 mm²/s and ambient temperatures from −20 to +50 °C. Spool actuation is provided by a 6E high-power pilot valve that delivers rapid response under the specified hydraulic loads.
The pilot solenoid is wound for 110 V AC at 50 or 60 Hz, enabling direct connection to industrial mains. A concealed manual override designated N9 permits local actuation when electrical power is unavailable. Pilot oil is supplied externally through port X and returned internally to port T; the circuit operates up to 210 bar and remains functional down to 10.5 bar. A throttle insert with a 0.8 mm orifice, labeled B08, controls pilot flow to moderate transients. An integrated D3 pressure-reducing element limits secondary pressure to 45 bar and is included as standard. These provisions combine electrical operation, safeguarded pilot hydraulics, and controlled flow conditioning within a single valve package.
Technical Specifications
Ambient Temperature Range (nbr)
−20 to +50 °C
Coil Voltage
110 V AC (50/60 Hz)
D3 Secondary Pressure
45 bar
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
280 bar
Max Pressure Port T (ac, Y Internal)
160 bar
Maximum Flow (symbol L)
450 l/min
Maximum Pilot Pressure
210 bar
Minimum Pilot Pressure (x External)
10.5 bar
Pilot Supply/return
X External; T Internal
Pilot Valve Type
6E High-Power
Porting Pattern
ISO 4401-08-08-0-05
Pressure Reducing Valve
D3 Included
Size
NG25 (W.H 22)
Throttle Insert
Ø0.8 mm (B08)
Viscosity Range
2.8 to 500 mm²/s
1620 Old Apex Road
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