Bosch Rexroth | 4WEH16D7XOF6EG24N9ETK4B10
4WEH16D7X/OF6EG24N9ETK4/B10
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The 4WEH16D7X/OF6EG24N9ETK4/B10 valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth for controlling oil flow in automated hydraulic circuits. It is built in size NG16 so it matches manifolds and subplates sized for medium-duty lines. A 4-way flow path lets the unit connect pressure, tank, and two actuator ports, while two spool positions provide discrete switching between work functions. The Symbol D spool passes up to 300 l/min, permitting rapid cylinder or motor movement. A maximum operating pressure of 280 bar allows the valve to run in high-pressure systems without overstressing internal parts. The porting pattern conforms to ISO 4401-07-07-0-05, enabling direct mounting on standardized blocks. Electrical power is supplied through a DIN EN 175301-803 K4 connector, and the coil is rated for 24 V DC, simplifying integration with common industrial control voltages.
The hydraulic pilot stage accepts up to 250 bar, giving the actuator enough force to shift the main spool under full load, while the tank port can also withstand 250 bar to accommodate back-pressure in return lines. Internal channels feed pilot oil to the control stage (ET) and return it to tank (T), eliminating external hoses and reducing leak points. The drive solenoid can still be repositioned manually because a concealed N9 override is provided for setup or emergency operation. Reliable switching begins at a minimum pilot pressure of 14 bar on two-position spools, ensuring positive actuation in low-pressure circuits. Flow metering before the pilot gallery is stabilized by a 1.0 mm throttle insert coded B10, which damps pressure spikes during shifts. To protect sensitive parts downstream, fluid cleanliness must meet ISO 4406 20/18/15, a level that limits particle contamination and supports long service life.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Electrical Connector
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (ng16, Symbol D)
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 (2-spool)
14 bar
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (ET)
Porting Pattern
ISO 4401-07-07-0-05
Rated Voltage
24 V DC
Size
NG16
Spool Positions
2
Throttle Insert
1.0 mm (B10)
Way Configuration
4-Way
1620 Old Apex Road
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