Bosch Rexroth | 4WEH22J7X6EW110N9ETDAB08
4WEH22J7X/6EW110N9ETDA/B08
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The 4WEH22J7X/6EW110N9ETDA/B08 valve is manufactured by Bosch Rexroth and belongs to the WEH Directional Spool Valves series. It directs hydraulic flow in automated circuits using a 4-way channel arrangement, allowing actuators to extend and retract with a single unit. The NG25 size matches systems that require medium flow capacity, and the three spring-centered spool positions enable neutral return when the solenoids are de-energized. Subplate mounting simplifies replacement on standardized manifolds, while the ISO 4401-08-08-0-05 porting pattern ensures interface compatibility with common base plates. Internal pilot oil supply and return reduce external plumbing, and a Ø0.8 mm throttle insert labeled B08 meters pilot flow for smoother shifting. With two solenoids installed, the valve weighs 11.9 kg, a consideration for manifold support and handling.
The main flow paths tolerate operating pressures up to 280 bar, enabling use in high-pressure power units. Pilot control circuits may be charged to 210 bar, while reliable actuation begins at a minimum pilot pressure of 10.5 bar for the spring-centered design. The valve accommodates hydraulic fluids with viscosities from 2.8 mm²/s to 500 mm²/s, covering thin synthetic blends to heavy mineral oils. Continuous service is permitted in ambient temperatures up to 50 °C, and fluid temperatures may reach 80 °C without degrading internal seals. To protect precision clearances, the fluid cleanliness requirement is ISO 4406 class 20/18/15, which limits particulate contamination and preserves spool life.
Technical Specifications
Fluid Cleanliness Class
ISO 4406 20/18/15
Max Ambient Temperature
50 C
Max Fluid Temperature
80 C
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Maximum Viscosity
500 mm²/s
Min Pilot Pressure (3-pos, Spring-centered)
10.5 bar
Minimum Viscosity
2.8 mm²/s
Mounting Type
Subplate Mounting
Pilot Oil Supply/return
Internal Supply and Return (ET)
Porting Pattern
ISO 4401-08-08-0-05
Size
NG25
Spool Positions
3 (Spring-Centered)
Throttle Insert
Ø0.8 mm (B08)
Valve Configuration
4-Way
Weight (two Solenoids, Spring-centered)
11.9 kg
1620 Old Apex Road
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