Bosch Rexroth | 4WEH16HD7XOF6EW110N9K4
4WEH16HD7X/OF6EW110N9K4
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The 4WEH16HD7X/OF6EW110N9K4 directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It directs flow in mobile or industrial hydraulic circuits via electro-hydraulic actuation, using a solenoid pilot stage to shift the main spool. The valve is built in NG16 size, supporting system layouts that follow the ISO 4401-07-07-0-05 porting pattern for easy manifold integration. Subplate mounting simplifies replacement without disturbing pipework, and a maximum flow rate of 300 l/min allows high-volume circuits to be controlled without excessive pressure loss. External pilot oil is supplied through port X while the return leaves through port Y, enabling independent tuning of pilot pressure. A minimum pilot pressure of 14 bar guarantees reliable spool movement. Electrical connection is made through a DIN EN 175301-803 K4 plug.
The hydraulic work ports p, a, and b can be loaded continuously up to 280 bar, while the pilot stage tolerates up to 250 bar and the tank port t is rated for the same 250 bar, aligning the valve with typical medium-pressure power units. An NBR seal package resists common mineral oils and maintains leakage control throughout the pressure range. A concealed manual override identified by code N9 permits local actuation during commissioning or power loss without exposing moving parts to contaminants. The valve operates cleanly when the fluid reaches ISO 4406 class 20/18/15, safeguarding the precision fit between spool lands and bore. The D-type hydraulic end spool provides a flow path suited for standard four-way, three-position control tasks, completing the functional profile.
Technical Specifications
Actuation
Electro-Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Fluid Cleanliness Class
ISO 4406 20/18/15
Manual Override
Concealed (N9)
Max Flow
300 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Tank Port Pressure (t)
250 bar
Min Pilot Pressure
14 bar
Mounting
Subplate
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-07-07-0-05
Seal Material
NBR
Size
NG16
Spool Symbol
D (Hydraulic End)
1620 Old Apex Road
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