Bosch Rexroth | H-4WEH25H6X6EG96N9TS2K4
H-4WEH25H6X/6EG96N9TS2K4
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The H-4WEH25H6X/6EG96N9TS2K4 valve belongs to Bosch Rexroth’s WEH Directional Spool Valves series and functions as a pilot-operated unit for directing hydraulic flow in automated equipment. It is built with a nominal size 25 that accommodates medium-to-high flow circuits, and it provides four flow ways so that pressure, service, and tank lines can be arranged in multiple operating positions. A 6E pilot stage governs the main spool, with pilot oil supplied externally through port X and returned internally through port T. The spool is forced back to center by hydraulic pressure rather than springs. Actuation is achieved with a 96 V DC coil connected via a DIN EN 175301-803 plug for standardized wiring. The pilot circuit accepts up to 250 bar, enabling reliable switching under demanding system pressure.
The housing endures 350 bar on ports P, A, and B, while the external drain port Y is limited to 210 bar. Switching speed can be refined with the S2 adjustment to match machine cycle requirements, and a concealed manual override allows spool shifting without electrical power during maintenance. External surfaces carry a corrosion-resistant coating no thicker than 100 µm. Internal cleanliness is controlled to ISO 4406 code 20/18/15, a level that protects close-fit components and minimizes leakage. The mean time to dangerous failure is rated at 100 years, giving the valve long-term suitability for safety-related installations.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Coil Voltage
96 V DC
Control Spool Return
Hydraulic
Electrical Connection
DIN EN 175301-803
Manual Override
Concealed
Max Pilot Pressure
250 bar
Max Pressure (port Y External)
210 bar
Max Pressure (ports P, A, B)
350 bar
Mttfd
100 years
Nominal Size (ng)
25
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Pilot Valve Type
6E
Surface Protection
Coating ≤ 100 µm
Switching Time Adjustment
S2
Valve Ways
4
1620 Old Apex Road
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