Bosch Rexroth | 4WEH16HD7XO6EG24N9K4
4WEH16HD7X/O6EG24N9K4
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The 4WEH16HD7X/O6EG24N9K4 belongs to the WEH Directional Spool Valves series from Bosch Rexroth and directs hydraulic flow in automated machinery. The NG16 size sets the mounting footprint while giving the passage areas needed for medium flow rates. Its ISO 4401-07-07-0-05 porting pattern mates with standard subplates so manifold layout remains consistent. A 4-way configuration provides one pressure port, two work ports, and a return, enabling bidirectional cylinder control. Two spool positions let the machine alternate between extend and retract circuits without delay. Spool symbol D specifies the internal gallery arrangement selected for typical work functions. A hydraulic return moves the main spool back to its rest position after the control signal is removed. A concealed manual override identified as N9 allows technicians to shift the valve during setup, and an external pilot oil supply marked X separates control pressure from the main line for stable actuation.
Actuation uses a 24 V DC coil that connects directly to common PLC outputs, and the DIN EN 175301-803 plug coded K4 offers a robust electrical interface. The housing passes up to 300 l/min, supporting fast actuator motion without significant pressure loss. Ports P, A, and B tolerate working pressures to 280 bar, whereas the tank port is limited to 250 bar to safeguard the return circuit. The pilot stage accepts 250 bar so no additional reducer is required, and the external drain port Y remains safe up to 210 bar when back pressure develops. Reliable end-position engagement is reached once pilot pressure exceeds 14 bar, ensuring full spool travel under all conditions.
Technical Specifications
Coil Voltage
24 V DC
Electrical Connection
DIN EN 175301-803 (K4)
Main Spool Return
Hydraulic
Manual Override
Concealed (N9)
Max Flow
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Operating Pressure (t)
250 bar
Max Pilot Pressure
250 bar
Max Pressure Port Y (external)
210 bar
Min Pilot Pressure (hydraulic End Pos)
14 bar
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-07-07-0-05
Size
NG16
Spool Positions
2
Spool Symbol
D
Way Configuration
4-Way
1620 Old Apex Road
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