Bosch Rexroth | 4WEH10EB4X6EG12N9K4
4WEH10EB4X/6EG12N9K4
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The 4WEH10EB4X/6EG12N9K4 valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic flow in automated machinery where electrical signals must switch high-pressure oil paths. Electro-hydraulic actuation converts the solenoid input into pilot pressure so the main spool moves without large electrical force. The valve is built in size NG10, allowing compact installation in medium-flow circuits. For symbol E at this size, the unit passes up to 160 l/min to support actuators that demand high speed movement. Ports P, A, and B tolerate operating pressures to 280 bar, enabling use in standard industrial power units. When a three-position spring-centered spool is selected, the pilot stage needs at least 12 bar to shift the main spool reliably.
Subplate mounting simplifies replacement and lines up with the ISO 4401-05-05-0-05 porting pattern so manifold blocks can be standardized. The electrical interface follows DIN EN 175301-803 type K4, giving installers a common plug configuration for coil wiring. Pilot supply may rise to 250 bar, while the pilot return channel withstands up to 210 bar; these limits define safe margins for the control circuit. Hydraulic fluid must meet cleanliness class 20/18/15 per ISO 4406 to keep the precision surfaces free of abrasive particles. A maximum coating thickness of 100 µm protects external metal against corrosion without interfering with mounting fits. Functional safety is reflected by an MTTFd of 100 years, indicating long statistical life for critical applications.
Technical Specifications
Actuation Type
Electro-Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Fluid Cleanliness Class
20/18/15 (ISO 4406)
Max Flow (symbol E, Ng10)
160 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (3-pos, Spring-centered)
12 bar
Mounting Type
Subplate Mounting
Mttfd
100 years
Pilot Return Max Pressure (dc)
210 bar
Porting Pattern
ISO 4401-05-05-0-05
Size
NG10
Surface Coating Thickness Max
100 µm
1620 Old Apex Road
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