Bosch Rexroth | 4WEH10H4X6EG96N9K4
4WEH10H4X/6EG96N9K4
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The 4WEH10H4X/6EG96N9K4 directional spool valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series. It directs flow between pump, actuator, and tank lines in hydraulic automation circuits where remote electrical signals activate movement. Electro-hydraulic actuation allows a small control current to shift the NG10 spool, reducing pilot load on the main stage. A 4WE6 high-power pilot valve supplies the pilot flow, and the pilot stage tolerates up to 250 bar. The main ports p, a, and b withstand 350 bar, while the return port t is limited to 315 bar, matching common industrial systems. The unit fits a subplate interface that follows ISO 4401-05-05-0-05, and four M6 × 45 screws secure the body. Correct assembly requires 12.5 Nm torque so the seal integrity is maintained during pressure cycles.
The valve's nominal size is 10, giving adequate flow capacity for medium-duty machinery. Electrical control is routed through a DIN EN 175301-803 plug coded K4, providing quick disconnection during service. A concealed manual override labeled N9 permits on-site spool shifting when electrical power is unavailable. Fluid entering the device should meet ISO 4406 class 20/18/15 to preserve spool clearances and extend service life. The pilot port is sealed with an M6 plug screw according to DIN 906, preventing leakage when remote pilot lines are not connected. A zinc coating 100 µm thick shields exterior surfaces against corrosion in humid factories. The design achieves a mean time to dangerous failure of 100 years, supporting safety calculations in critical installations.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p/a/b)
350 bar
Max Operating Pressure (t)
315 bar
Max Pilot Pressure
250 bar
Mounting Pattern
ISO 4401-05-05-0-05
Mounting Screws
4 x M6 x 45 (ISO 4762)
Mounting Type
Subplate Mounting
Mttfd (type Weh)
100 Years
Nominal Size
10 (NG10)
Pilot Control Valve
4WE6 High-Power (6E)
Pilot Port Plug Screw
M6 (DIN 906)
Screw Tightening Torque
12.5 Nm
Surface Protection Thickness
100 µm
1620 Old Apex Road
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