Bosch Rexroth | 4WEH16HG7X6EG24N9S2K4
4WEH16HG7X/6EG24N9S2K4
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The 4WEH16HG7X/6EG24N9S2K4 valve from Bosch Rexroth belongs to the WEH Directional Spool Valves series and serves to shift hydraulic flow paths in automated machinery. It is built in nominal size NG16, allowing medium-frame manifold layouts, and uses subplate mounting so the body can be exchanged without disturbing pipework. The porting pattern follows ISO 4401-07-07-0-05 for interchangeability with standardized bases. A 6E high-power pilot valve actuates the main stage, while a hydraulic spool return re-centers the element after command signals are removed. Electrical actuation is provided by a 24 V DC coil that connects through a DIN EN 175301-803 K4 plug, simplifying wiring inside control cabinets. The internal spool geometry is designated by symbol G, defining flow paths compatible with pressure-centered circuits.
For field service control, a concealed manual override labeled N9 lets technicians shift the valve without energizing the coil. The unit handles up to 300 l/min when the spool is pressure-centered, making it suitable for high-throughput circuits. Working ports p, a, and b tolerate operating pressures to 350 bar, while the pilot stage accepts pressures up to 250 bar and requires at least 16 bar to move the main spool. Both pilot oil supply and return are external, which isolates the control oil from main line contamination and allows independent pressure selection. Switching time can be refined via discharge control S2, letting machine builders match response to system dynamics. Together these characteristics enable reliable directional control in demanding hydraulic automation tasks.
Technical Specifications
Coil Voltage
24 V DC
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (pressure-centered)
300 l/min
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (press.-centered)
16 bar
Mounting
Subplate Mounting
Nominal Size
NG16
Pilot Oil Return
External
Pilot Oil Supply
External
Pilot Valve Type
6E High-Power
Porting Pattern
ISO 4401-07-07-0-05
Spool Return In Main Valve
Hydraulic
Spool Symbol
G
Switching Time Adjustment
Discharge Control (S2)
1620 Old Apex Road
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