Bosch Rexroth | 4WEH16M7X6EW110N9TDA
4WEH16M7X/6EW110N9TDA
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The 4WEH16M7X/6EW110N9TDA valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series and is intended for directing pressurized fluid in automated hydraulic systems. It uses electro-hydraulic actuation so an electrical pilot stage shifts the main spool under hydraulic assist. The size is NG16, which matches standard manifold cavities and allows a maximum flow of 300 l/min when the spool with symbol M is selected. Three discrete spool positions provide mid-shift neutrality and two working shifts for bidirectional cylinder control in a 4-way circuit. Installation is by subplate, and the porting pattern follows ISO 4401-07-07-0-05, enabling interchange with other components that share this interface. Pilot oil is supplied externally through port X, while a dedicated high-power 6E pilot valve converts coil energy into pilot flow to move the main element.
The hydraulic envelope of the valve supports operating pressures up to 280 bar at ports P, A, and B, allowing service in medium-pressure power units. Pilot controls can withstand 250 bar, yet spool centering requires only 14 bar as the minimum pilot pressure when the spring-centered return is active. Pilot oil returns internally through the T gallery, simplifying external piping and reducing leakage points. Fluid cleanliness must be maintained at ISO 4406 code 20/18/15 to protect tight clearances and ensure reliable shifting. A concealed manual override lets maintenance staff reposition the spool without energizing the coil; its recessed placement shields the push pin from accidental contact and debris intrusion. Together these limits on pressure, cleanliness, and manual intervention define the operational window for consistent flow control in demanding automation circuits.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class (iso 4406)
20/18/15
Manual Override
Concealed
Max Flow (ng16, Symbol M)
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (spring-centered)
14 bar
Mounting Type
Subplate
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Pilot Valve
High-Power 6E
Porting Pattern
ISO 4401-07-07-0-05
Size
NG16
Spool Positions
3
Spool Symbol
M
Way Configuration
4-Way
1620 Old Apex Road
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