Bosch Rexroth | 4WEH10Y4X6EW110N9TDA
4WEH10Y4X/6EW110N9TDA
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The 4WEH10Y4X/6EW110N9TDA directional spool valve is produced by Bosch Rexroth as part of the WEH Directional Spool Valves series. It serves hydraulic automation systems by shifting flow paths under electro-hydraulic actuation, which couples a solenoid-piloted stage with the main spool to allow remote control. The Y spool symbol defines the internal gallery arrangement, while the two switching positions provide either open or closed circuit states for machine functions. A nominal size of NG10 sets the port geometry, supporting a maximum flow of 160 l/min without excessive pressure drop. The valve tolerates operating pressures up to 280 bar, so it can be installed in medium-pressure power units, and its use with HL or HLP hydraulic fluids according to DIN 51524 maintains proper lubrication and seal integrity.
External pilot oil supply at port X feeds the control stage, and an internal return to port T brings the pilot oil back to tank, simplifying piping on the return side. The pilot circuit may be loaded up to 250 bar, while a spring-biased version needs at least 10 bar to shift from the spring end position, guaranteeing reliable actuation across the stated pressure window. When electrical power is unavailable, a concealed manual override designated N9 allows spool movement, and its use must keep tank pressure below 50 bar to prevent damage. The sub-plate mounting face follows ISO 4401-05-05-0-05, secured with four M6 × 45 cap screws per ISO 4762 tightened to 12.5 Nm, ensuring seal compression and positional stability.
Technical Specifications
Actuation
Electro-Hydraulic
Hydraulic Fluid
HL/HLP (DIN 51524)
Manual Override
Concealed (N9)
Manual Override Tank Pressure Limit
50 bar
Maximum Flow
160 l/min
Maximum Operating Pressure
280 bar
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure (2-pos Spring End)
10 bar
Mounting Interface
ISO 4401-05-05-0-05
Mounting Screws
4 × M6 × 45 (ISO 4762)
Nominal Size
NG10
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Screw Tightening Torque
12.5 Nm
Spool Symbol
Y
Switching Positions
2
1620 Old Apex Road
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