Bosch Rexroth | H-4WEH22E7X6EG24N9ETS2K4B10P45D3
H-4WEH22E7X/6EG24N9ETS2K4/B10P4.5D3
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The H-4WEH22E7X/6EG24N9ETS2K4/B10P4.5D3 valve is manufactured by Bosch Rexroth and belongs to the WEH Directional Spool Valves series. It directs hydraulic flow in automated circuits by shifting a size 25 spool, identified by symbol E, to connect or block pressure and return lines. The unit mounts on subplates with the ISO 4401 porting pattern, so integration with standardized manifolds is straightforward. Control signals arrive through a DIN EN 175301-803 K4 electrical connector, energized by a 24 V DC coil, which permits direct wiring to most machine controllers. Internal pilot oil supply, coded ET, eliminates the need for an external pilot line and simplifies plumbing. A maximum pressure of 350 bar can be applied at ports P, A, and B, enabling use in high-pressure systems. The throttle insert marked B10 introduces a 1.0 mm orifice that moderates flow on the P-port. When local actuation is required, a concealed N9 manual override allows the operator to shift the spool without electrical power.
Pilot functions operate within defined limits: the pilot stage tolerates up to 210 bar and requires at least 12.5 bar to move the spring-centered spool, assuring reliable shifting under variable load conditions. A preload valve opens once pressure reaches 4.5 bar, while a built-in reducing valve holds pilot pressure to 45 bar, preventing excess force on the control piston. Secure mounting is achieved with four M12 × 60 screws specified in ISO 4762, each tightened to 100 Nm to resist vibration. The applied torque keeps the subplate gasket compressed during rapid pressure transients and avoids leakage. Hydraulic cleanliness must not exceed class 20/18/15 per ISO 4406, protecting the spool and seats from abrasion. These characteristics, combined with the standardized interface, let the valve manage directional control tasks consistently in demanding automation environments.
Technical Specifications
Cleanliness Class (iso 4406)
20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Electrical Voltage
24 V DC
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
350 bar
Maximum Pilot Pressure
210 bar
Min Pilot Pressure (3-pos Spring-centered)
12.5 bar
Mounting Screw Size
M12 x 60 (ISO 4762)
Mounting Screw Torque
100 Nm
Nominal Size (ng)
25
Pilot Oil Supply
Internal (ET)
Porting Pattern
ISO 4401
Preload Valve Cracking Pressure
4.5 bar (P4.5)
Pressure Reducing Valve Pressure
45 bar (D3)
Spool Symbol
E
Throttle Insert Orifice
1.0 mm (B10)
1620 Old Apex Road
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