Bosch Rexroth | 4WEH22W7X6EW110N9ETDK25LB10V
4WEH22W7X/6EW110N9ETDK25L/B10V
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The 4WEH22W7X/6EW110N9ETDK25L/B10V is produced by Bosch Rexroth for the WEH Directional Spool Valves series and is applied to route hydraulic oil in automated machinery. It employs a 4-way flow path combined with a 3-position spool that carries the W symbol, giving three discrete circuit states for ports P, A, B, and T. Nominal size NG25 aligns the valve with mid-capacity manifolds, while the ISO 4401-08-08-0-05 porting pattern lets it bolt directly to standard subplates. A concealed manual override permits local actuation when the electrical signal is absent. Fluid sealing is handled by FKM rings to accommodate higher temperatures and synthetic fluids. An optional throttle insert with a 1.0 mm orifice can be installed in the pilot gallery to dampen shift speed. In the center position the free cross-section between port A and tank is limited to 10 mm² to restrict standby leakage.
The design handles a maximum flow of 450 l/min when the W spool is selected, serving high-volume circuits. Main ports tolerate operating pressures up to 280 bar, and the pilot stage accepts 210 bar without overstress. Consistent shifting requires a minimum pilot pressure of 10.5 bar to overcome spring forces in the three-position arrangement. Pilot oil is supplied and returned internally as designated by the ET configuration, and the internal return path manages backpressures to 160 bar. With two solenoids and spring centering installed, the assembly weighs 11.9 kg, a factor to consider for manifold support. These pressure, flow, and pilot characteristics define its suitability for precise directional control in demanding hydraulic automation systems.
Technical Specifications
Manual Override
Concealed
Max Flow (symbol W)
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure (3-position)
10.5 bar
Nominal Size
NG25
Pilot Oil Configuration
Internal Supply/Return (ET)
Pilot Return Pressure (y Internal, Ac)
160 bar
Porting Pattern
ISO 4401-08-08-0-05
Seal Material
FKM
Spool Positions
3-Position
Spool Symbol
W
Throttle Insert Orifice
Ø1.0 mm
Way Configuration
4-Way
Weight (2 Solenoids, Spring-centered)
11.9 kg
Zero Position A–t Free Area (w)
10 mm²
1620 Old Apex Road
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