Bosch Rexroth | 4WEH16HU7X6EW110N9TS2DK25L
4WEH16HU7X/6EW110N9TS2DK25L
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The 4WEH16HU7X/6EW110N9TS2DK25L is a directional spool valve built by Bosch Rexroth as part of the WEH Directional Spool Valves series. It directs hydraulic flow in automation systems and is intended for NG16 circuit layouts. The valve employs a 4-way body with three discrete spool positions, and the neutral state is pressure-centered. Spool movement is returned hydraulically instead of by springs. Pilot actuation relies on a Type 6E high-power stage, with external port X feeding pilot oil and internal channel T returning it to tank.
During operation the unit passes up to 300 l/min when the spool rests in the pressure-centered position, and service ports p, a, and b tolerate 280 bar. The pilot section accepts pressures up to 250 bar yet still shifts reliably from 16 bar as the minimum pilot level. Installation follows the ISO 4401-07-07-0-05 pattern and is secured by four M10 × 60 screws torqued to 58 Nm. A concealed N9 manual override lets technicians shift the spool without electrical or pilot power.
Technical Specifications
Control Spool Return
Hydraulic
Manual Override
Concealed (N9)
Max Flow (pressure-centered, Ng16)
300 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (pressure-centered)
16 bar
Mounting Screws (metric)
4 x M10 x 60
Nominal Size
NG16
Pilot Control Valve
Type 6E (High-Power)
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-07-07-0-05
Screw Tightening Torque (m10)
58 Nm
Spool Positions
3
Way Configuration
4-Way
Zero Position
Pressure-Centered
1620 Old Apex Road
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