Bosch Rexroth | 4WEH16D7X6EG12N9K4
4WEH16D7X/6EG12N9K4
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The 4WEH16D7X/6EG12N9K4 directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It serves as a 4-way element that directs hydraulic flow in automated circuits. Actuation is electro-hydraulic, so a pilot stage moves the main spool when a 12 V DC coil is energized. The electrical interface follows DIN EN 175301-803 K4, allowing standard plug connections, and a concealed manual override labeled N9 lets maintenance staff shift the valve without power. The unit is built in size 16 and employs spool symbol D to establish flow paths suited to high-flow machinery. External X and Y lines handle pilot oil supply and return, completing the control arrangement for systems that isolate pilot flow from the main ports.
The valve passes up to 300 l/min through the main spool and withstands 280 bar on ports P, A, and B during continuous duty. Pilot circuitry tolerates 250 bar, while port T is also limited to 250 bar and the external Y return is rated for 210 bar. Reliable shifting begins once 14 bar of pilot pressure is available, a threshold set for the two-position design. The assembly carries exactly two spool positions to alternate flow paths on command. Installation follows the ISO 4401-07-07-0-05 mounting pattern, enabling interchange with other subplate components. Together, these pressure, flow, and mounting figures define the operating envelope of the 4WEH16D7X/6EG12N9K4 in hydraulic automation.
Technical Specifications
Actuation
Electro-Hydraulic
Coil Voltage
12 V DC
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (ng16, Spool D)
300 l/min
Max Operating Pressure (p/a/b)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port T
250 bar
Max Pressure Port Y (external)
210 bar
Min Pilot Pressure (2-spool)
14 bar
Mounting Pattern
ISO 4401-07-07-0-05
Pilot Oil Supply/return
External (X/Y)
Size (ng)
16
Spool Positions
2
Spool Symbol
D
Valve Type
4-Way
1620 Old Apex Road
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