Bosch Rexroth | 4WEH22G7X6EW110N9EDAB10P4-5
4WEH22G7X/6EW110N9EDA/B10P4 5
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The 4WEH22G7X/6EW110N9EDA/B10P4 5 directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and directs hydraulic flow in automated systems. Electro-hydraulic actuation moves the spool by using a pilot stage instead of a direct-acting solenoid, which lowers required coil force. Its 4-way configuration permits separate pressure, tank, and two actuator ports, while the NG25 size defines the port layout for that flow class. Spool symbol G establishes the internal flow paths selected when the valve shifts. A maximum flow capacity of 200 l/min at 280 bar supports medium-to-high volume circuits, and the same 280 bar rating on ports p, a, and b sets the working pressure limit. Subplate mounting to ISO 4401 simplifies replacement in standardized manifolds. Pilot oil is supplied internally through the X port, and it returns externally via the Y port so tank back pressure does not influence the pilot stage.
A concealed manual override coded N9 allows local actuation during commissioning or power loss without leaving a protruding pin that could be damaged. The pilot stage tolerates up to 210 bar, protecting components when system pressure peaks, yet it needs at least 4.5 bar in the internal supply line to shift the main spool reliably. A preload valve with a cracking pressure of 4.5 bar ensures that pilot flow starts only after this threshold, improving response consistency. The B10 throttle insert has a 1.0 mm orifice that meters pilot oil and prevents shock when the spool transitions. Six M12 × 60 mounting screws anchor the housing to the manifold, and each screw requires 100 Nm of tightening torque to maintain a leak-free joint under load.
Technical Specifications
Actuation Type
Electro-Hydraulic
Manual Override
Concealed (N9)
Max Flow (symbol G @ 280 Bar)
200 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure (x Internal)
4.5 bar
Mounting
Subplate (ISO 4401)
Mounting Screws
6× M12 × 60
Pilot Oil Return
External (Y)
Pilot Oil Supply
Internal (X)
Preload Valve Cracking Pressure
4.5 bar
Size
NG25
Spool Symbol
G
Throttle Insert Diameter
1.0 mm (B10)
Tightening Torque (m12 Screws)
100 Nm
Way Configuration
4-Way
1620 Old Apex Road
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