Bosch Rexroth | H-4WEH25H6X6EG24N9S2K4
H-4WEH25H6X/6EG24N9S2K4
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The H-4WEH25H6X/6EG24N9S2K4 directional spool valve belongs to the WEH Directional Spool Valves series produced by Bosch Rexroth. It directs hydraulic flow in automated circuits through electro-hydraulic actuation. The unit uses a 4-way spool and has a nominal size of NG25, allowing controlled distribution of medium to high flow rates. It installs on a subplate and matches the ISO 4401-08-08-0-05 porting pattern for standardized manifold layouts. Control signals at 24 V DC enter via a DIN EN 175301-803 K4 connector. The main spool returns hydraulically to its neutral position, and a concealed N9 manual override lets technicians shift the spool during power loss. Operating pressure at the work ports may reach 350 bar, contained by NBR seals intended for common hydraulic oils.
Pilot oil is supplied externally and is returned externally, keeping control pressure isolated from tank back-pressure. A high-power 6E pilot control valve delivers rapid shifting of the main stage, and the pilot circuit tolerates pressures up to 250 bar without loss of responsiveness. The valve offers a mean time to dangerous failure of 100 years, helping designers satisfy long-term reliability targets in safety-rated equipment. These pilot-side characteristics complete the performance profile of the H-4WEH25H6X/6EG24N9S2K4 in continuous-duty hydraulic automation.
Technical Specifications
Actuation
Electro-Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Main Spool Return
Hydraulic
Manual Override
Concealed (N9)
Max Operating Pressure
350 bar
Mounting Type
Subplate
Mttfd
100 Years
Nominal Size
NG25
Pilot Control Valve
High-Power (6E)
Pilot Max Pressure
250 bar
Pilot Oil Return
External
Pilot Oil Supply
External
Porting Pattern
ISO 4401-08-08-0-05
Rated Voltage
24 V DC
Seal Material
NBR
Way Configuration
4-Way
1620 Old Apex Road
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