Bosch Rexroth | 4WEH10H4X6EW110N9DK25
4WEH10H4X/6EW110N9DK25
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The 4WEH10H4X/6EW110N9DK25 valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and controls flow paths in hydraulic automation loops. It is built in size NG10, giving port dimensions that suit medium-flow manifolds, and it uses a 4/3-way arrangement so the four service ports can occupy three stable positions. Spool symbol H specifies the internal cross-connections used in each position. The main spool is shifted by an electro-hydraulic pilot stage, which lowers coil force and enables fast response. A minimum pilot pressure of 12 bar is necessary to move the spool, while the pilot circuit tolerates up to 250 bar. The unit’s performance limit is 160 L/min at 70 bar, defining the highest flow it can carry without excessive pressure drop. To protect the close-fitting lands, hydraulic oil must meet cleanliness class 20/18/15 in ISO 4406.
Main ports p, a, and b withstand up to 280 bar, and the same 280 bar rating applies to tank port t so back-pressure does not restrict return flow. Pilot return at port y is limited to 160 bar to preserve the pilot seals. A concealed N9 manual override allows the spool to be shifted when electrical power is not available. The valve mounts on a subplate that matches interface ISO 4401-05-05-0-05; four M6 × 45 screws are required, and each must be tightened to 12.5 Nm for leak-free seating. The assembled weight of 6.8 kg in the two-solenoid, spring-centered design affects handling during installation. These pressure capacities, mounting details, and service features define the valve’s suitability for high-pressure, medium-flow industrial equipment.
Technical Specifications
Actuation Type
Electro-Hydraulic Pilot
Fluid Cleanliness
Class 20/18/15 (ISO 4406)
Manual Override
Concealed (N9)
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return (y) Pressure (ac)
160 bar
Max Tank Port Pressure (t)
280 bar
Min Pilot Pressure (x External)
12 bar
Mounting Interface
ISO 4401-05-05-0-05
Mounting Screw Torque
12.5 Nm
Mounting Screws
M6 x 45 (4 pcs)
Performance Limit (ng10, H)
160 l/min (70 bar)
Size (ng)
10
Spool Symbol
H
Way Configuration
4/3-Way
Weight (2-solenoid, Spring-centered)
6.8 kg
1620 Old Apex Road
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