Bosch Rexroth | H-4WEH25J6X6EW110N9EDK25LB10D3-AN
H-4WEH25J6X/6EW110N9EDK25L/B10D3 AN
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The H-4WEH25J6X/6EW110N9EDK25L/B10D3 AN valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and guides hydraulic flow for automated machinery. It uses electro-hydraulic actuation so an electrical command shifts the spool without direct manual force. The 4-way configuration provides two service lines plus pressure and tank paths for reversible actuator control. Its nominal size of NG25 supports moderate flow rates, while subplate mounting shortens change-out time on manifold blocks. A porting pattern of ISO 4401-08-08-0-05 keeps the interface consistent with common bases. Pilot oil is taken internally from port P and returned externally through port Y to isolate control pressure from tank pressure. Main ports A and B withstand 350 bar, port T is limited to 250 bar, and the pilot stage tolerates up to 250 bar, allowing high-pressure work circuits with protected return passages.
The integrated 6E high-power pilot valve supplies ample pilot flow so the main stage moves quickly even under full load. Downstream of the D3 damping feature the pilot pressure drops to 45 bar, moderating spool acceleration for smoother shifts. The pilot return Y line accepts up to 160 bar, supporting systems with elevated back pressure. A concealed manual override labeled N9 enables local operation during setup or power loss while shielding the button from dirt. A 1.0 mm throttle insert limits pilot flow to reduce shock on directional changes. System oil must meet ISO 4406 20/18/15 cleanliness to prevent scoring of precision lands. The valve’s mean time to dangerous failure is 100 years, giving long functional life in safety-related applications.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
High-power Pilot Valve
6E
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
350 bar
Max Pilot Pressure
250 bar
Max Pressure (port T)
250 bar
Mounting Type
Subplate
Mttfd
100 years
Nominal Size
NG25
Pilot Oil Supply/return
Internal (P) / External (Y)
Pilot Pressure After D3
45 bar
Pilot Return Y Max Pressure (ac)
160 bar
Porting Pattern
ISO 4401-08-08-0-05
Throttle Insert Orifice
1.0 mm
Way Configuration
4-way
1620 Old Apex Road
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