Bosch Rexroth | H-4WEH22R7X6EW110N9ETK4B08D3-SO269
H-4WEH22R7X/6EW110N9ETK4/B08D3 SO269
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The H-4WEH22R7X/6EW110N9ETK4/B08D3 SO269 valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series and is intended to shift hydraulic flow between circuits in automated machinery. It mounts in a NG25 cavity, and the ISO 4401-08-08-0-05 porting pattern matches standard subplates for quick replacement. The unit offers four ways so it can direct pressure and return lines to a double-acting actuator. Spool symbol R defines the neutral and actuated paths that achieve this routing. A spring-centered mechanism returns the spool to its neutral position whenever the solenoid is de-energized. Internal pilot oil supply removes the need for an external feed line, and internal pilot oil return channels the pilot flow back to the tank through the valve body. For service tasks, a concealed manual override allows the spool to be shifted without electrical power.
The electrical interface follows DIN EN 175301-803, enabling connection with standard industrial plugs. Allowed operating pressure at ports P, A, and B is 350 bar, while the valve handles up to 450 l/min of flow to support high-volume circuits. Pilot control circuits may reach 210 bar, and at least 12.5 bar is necessary to shift the spool reliably. Secondary port d3 is rated for 45 bar, providing a safe limit for drain pressure. A built-in 0.8 mm throttle orifice meters pilot flow so that spool movement remains stable. NBR sealing elements resist common hydraulic oils and maintain leakage integrity under the stated pressures. Together, these features enable consistent operation in systems that require rapid actuator movement at high working pressure.
Technical Specifications
Centering Type
Spring-Centered
Electrical Connection
DIN EN 175301-803
Manual Override
Concealed
Max Flow
450 l/min
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
210 bar
Minimum Pilot Pressure
12.5 bar
Nominal Size
NG25
Pilot Oil Return
Internal
Pilot Oil Supply
Internal
Porting Pattern
ISO 4401-08-08-0-05
Seal Material
NBR
Secondary Pressure (d3)
45 bar
Spool Symbol
R
Throttle Orifice
Ø 0.8 mm
Valve Ways
4
1620 Old Apex Road
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