Bosch Rexroth | 4WEH10W4X6EW110N9DK25L
4WEH10W4X/6EW110N9DK25L
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The 4WEH10W4X/6EW110N9DK25L directional spool valve is supplied by Bosch Rexroth within the WEH Directional Spool Valves series. It directs hydraulic flow in automation circuits where rapid, high-pressure switching is required. Its nominal size is NG10, and the 4/3-way configuration provides four working ports with a spring-centered neutral position. The W spool creates the designated flow paths, while a zero-position cross-section of 2.4 mm² limits internal leakage when centered. The valve permits up to 160 l/min through the W symbol flow pattern, allowing medium-to-high volume circuits to operate without restriction. Continuous service pressures reach 280 bar at ports P, A, and B, and the same 280 bar rating applies to port T so return lines can tolerate elevated back-pressure. A minimum pilot pressure of 12 bar is required to shift the spool from center, guaranteeing defined actuation forces even under low system pressure startup conditions.
Pilot actuation is handled by a 4WE 6E control valve; when it receives 35 l/min the main stage reaches its shortest switching time, supporting dynamic cylinder control. Pilot supply may rise to 250 bar, so the auxiliary circuit can match the pressure of heavy-duty machines without overstressing internal passages. A concealed manual override designated N9 is included, enabling local spool movement for maintenance while preventing accidental operation. Oil cleanliness must meet ISO 4406 class 20/18/15, which calls for filtration fine enough to protect the precision lands. The valve mounts on a manifold machined to ISO 4401-05-05-0-05, and sealing is aided by a mounting face roughness not exceeding Rzmax 4. Four M6 × 45 cap screws defined by ISO 4762 secure the body to the sub-plate and sustain the rated load. These installation and service parameters align the valve with standardized hydraulic power units.
Technical Specifications
Fluid Cleanliness Class
ISO 4406 20/18/15
Manual Override Type
Concealed (N9)
Max Flow (symbol W)
160 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port T
280 bar
Min Pilot Pressure (spring-centered)
12 bar
Mounting Face Surface Roughness
Rzmax 4
Mounting Interface
ISO 4401-05-05-0-05
Mounting Screws
4x M6 x 45 (ISO 4762)
Nominal Size
NG10
Pilot Control Valve Type
4WE 6E
Pilot Flow For Shortest Switching
35 l/min
Spool Symbol
W
Way Configuration
4/3-Way
Zero-pos Cross-section W (a–t, B–t)
2.4 mm²
1620 Old Apex Road
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