Bosch Rexroth | 4WEH10D4X6EG24N9ETS2K4B10
4WEH10D4X/6EG24N9ETS2K4/B10
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The 4WEH10D4X/6EG24N9ETS2K4/B10 directional spool valve is manufactured by Bosch Rexroth and belongs to the WEH Directional Spool Valves series. It directs hydraulic flow in automation circuits that require fast on-off actuation. The valve is built in size NG10, defining its mounting interface and flow rating. Two spool positions specified by symbol D switch flow paths for machine control. A maximum operating pressure of 280 bar is permitted at ports P, A, and B, while the pilot stage accepts up to 250 bar to drive the main spool. Internal pilot oil supply designated ET removes the need for external pilot lines, and internal pilot oil return through port T simplifies manifold design. Reliable shift timing is set by discharge control S2, and stable operation begins when the pilot pressure reaches a minimum of 10 bar.
Fluid cleanliness must meet ISO 4406 class 20/18/15 so the sliding spool remains free of abrasive wear. Electrical actuation is provided through a DIN EN 175301-803 K4 connector that matches common solenoid coils. The pilot return path withstands up to 210 bar, allowing elevated back-pressure conditions. Correct assembly uses ISO 4762 M6 x 45 screws tightened to 12.5 Nm, securing the body to a manifold drilled to the ISO 4401-05-05-0-05 porting pattern. A design lifetime MTTFd of 100 years supports long service intervals, and flow damping is provided by a 1.0 mm throttle insert labeled B10 to moderate pilot oil rates.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (internal, Dc)
210 bar
Min Pilot Pressure (2-spool Spring End)
10 bar
Mounting Screw Torque
12.5 Nm
Mounting Screws
ISO 4762 M6 x 45
Mttfd
100 Years
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (ET)
Porting Pattern
ISO 4401-05-05-0-05
Size
NG10
Spool Positions
2 (Symbol D)
Switching Time Adjustment
Discharge Control (S2)
Throttle Insert
Ø 1.0 mm (B10)
1620 Old Apex Road
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