Bosch Rexroth | 4WEH10Y4X6EG24N9S2K4
4WEH10Y4X/6EG24N9S2K4
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The 4WEH10Y4X/6EG24N9S2K4 valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It directs actuator flow in electro-hydraulic equipment where external pilot oil is acceptable. The nominal size NG10 establishes a port geometry that supports common mid-range flow rates, while the design provides two spool positions so cylinders can be extended or retracted under electrical command. External pilot oil enters through port X, and external return is routed through port Y to isolate control pressure from the main flow path. The unit maintains line pressure in ports p, a, and b up to 280 bar so it suits high-pressure industrial presses. Spool movement begins once a pilot pressure of 10 bar is present and can rise to 250 bar without overloading the pilot stage. A spring returns the spool to its end position when the solenoid is de-energized, ensuring a defined fail-safe state.
Installation follows the ISO 4401-05-05-0-05 mounting interface so the valve bolts directly onto standard NG10 subplates without additional adapters. The solenoid coil is energized with 24 V DC and terminates through a DIN EN 175301-803 plug coded K4, allowing quick connection in cabinet wiring harnesses. Switching speed can be fine-tuned by the discharge control feature marked S2, letting designers match response time to system dynamics. A concealed manual override designated N9 permits local actuation during commissioning while protecting the push pin from accidental contact. Port T withstands back-pressure up to 280 bar, supporting circuits that experience high shock loads or restricted tank lines. Hydraulic cleanliness must be maintained to ISO 4406 (c) 20/18/15 to prevent spool scoring and leakage. The predicted mean time to dangerous failure is 100 years, giving long service intervals in safety-related machinery.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Control Spool Return
Spring End Position
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port T
280 bar
Min Pilot Pressure
10 bar
Mounting Interface
ISO 4401-05-05-0-05
Mttfd
100 years
Nominal Size
NG10
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Spool Positions
2
Supply Voltage
24 V DC
Switching Time Adjustment
Discharge Control (S2)
1620 Old Apex Road
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