Bosch Rexroth | 4WEH22E7X6EG24N9ETK4B10
4WEH22E7X/6EG24N9ETK4/B10
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The 4WEH22E7X/6EG24N9ETK4/B10 valve is manufactured by Bosch Rexroth as part of the WEH Directional Spool Valves series. Designed to shift hydraulic flow paths in automated machinery, it relies on electro-hydraulic actuation so the main spool moves under pilot pressure rather than direct solenoid force. The unit is built in nominal size NG25, identified within the catalog as W.H 22, to handle circuits needing medium to high flow. With the E-configured spool it passes up to 450 l/min while containing system pressure to 280 bar. Ports follow the ISO 4401-08-08-0-05 pattern for interchangeability with standardized subplates. A spring-centered mechanism returns the spool to neutral when power is removed, and a concealed manual override allows local shifting for commissioning or troubleshooting without exposing moving parts.
The pilot stage uses the high-power 6E solenoid assembly and is energized by a 24 V DC supply, producing the force needed to actuate the main spool at pilot pressures between 10.5 bar and 210 bar. Pilot oil is routed internally for both supply and return, eliminating external lines and simplifying manifold layouts. Electrical connection is made through a DIN EN 175301-803 form K4 connector that supports quick field replacement. A throttle insert with a 1.0 mm orifice, coded B10, is fitted to damp pressure surges during rapid shifts. Together these features provide stable directional control in hydraulic systems that demand precise, repeatable switching under high flow conditions.
Technical Specifications
Actuation Type
Electro-Hydraulic
Centering Method
Spring-Centered
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (symbol E)
450 l/min
Max Operating Pressure
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure
10.5 bar
Nominal Size
NG25 (W.H 22)
Pilot Oil Return
Internal (ET)
Pilot Oil Supply
Internal (ET)
Pilot Valve Type
High-Power (6E)
Porting Pattern
ISO 4401-08-08-0-05
Spool Symbol
E
Supply Voltage
24 V DC
Throttle Insert
Ø 1.0 mm (B10)
1620 Old Apex Road
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