Bosch Rexroth | H-4WEH25G6X6EW110N9S2DAL
H-4WEH25G6X/6EW110N9S2DAL
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The H-4WEH25G6X/6EW110N9S2DAL valve is manufactured by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic flow in automated machines with electro-hydraulic actuation that converts an electrical command into hydraulic spool movement. The design provides four flow paths and carries the NG25 nominal size to match manifolds that handle mid-range volumes. A high-power 6E pilot control valve delivers 35 l/min pilot flow, allowing the main stage to shift quickly during high-cycle operation. System pressure can reach 350 bar on the P, A, and B ports, while the pilot channel withstands 250 bar. After each command, the spool returns to neutral by hydraulic force rather than by a mechanical spring.
Installation is by subplate mounting, and the ISO 4401 porting pattern keeps the valve interchangeable with standard blocks. The housing is secured with six M12 × 60 screws; each screw requires a tightening torque of 100 Nm with a tolerance of ±10 % to maintain sealing. A concealed N9 manual override lets technicians shift the spool locally when electrical power is absent. The allowable oil contamination level is limited to ISO 4406 (c) 20/18/15, so appropriate filtration must be provided upstream. These mounting, service, and cleanliness parameters support reliable operation within hydraulic automation cells that demand repeatable switching under elevated pressure.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406 (c) 20/18/15
Manual Override
Concealed (N9)
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Mounting Screws
M12 × 60 (6 pcs)
Mounting Type
Subplate Mounting
Nominal Size
NG25 (W.H 25)
Number Of Ways
4-Way
Pilot Control Valve
High-Power 6E
Pilot Flow For Fast Switching
35 l/min
Porting Pattern
ISO 4401
Screw Torque
100 Nm (±10%)
Spool Return Method
Hydraulic
1620 Old Apex Road
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