Bosch Rexroth | 4WEH16D7X6EG24N9S2K4
4WEH16D7X/6EG24N9S2K4
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The 4WEH16D7X/6EG24N9S2K4 directional valve is manufactured by Bosch Rexroth and belongs to the WEH Directional Spool Valves series. It directs hydraulic flow in automation circuits that require electrically piloted actuation. The nominal size NG16 defines the passage area for medium-capacity systems, and a maximum flow of 300 l/min lets the valve handle rapid actuator movement without excessive pressure loss. A maximum operating pressure of 280 bar at ports P, A, and B supports high-pressure drives, while an external pilot oil supply keeps control pressure independent of the main line. The pilot oil is also returned externally to prevent tank disturbances, and an allowable pilot pressure of 250 bar ensures secure shifting under load. The ISO 4401-07-07-0-05 mounting interface fits standard subplates for straightforward installation, and NBR sealing contains mineral oils without swelling.
The electrical section is powered by a 24 V DC coil that mates with a DIN EN 175301-803 K4 connector for uncomplicated wiring. Operation is permitted in ambient temperatures up to 50 °C, and the hydraulic fluid may reach 80 °C to suit most plant rooms. Oil cleanliness must meet ISO 4406 class 20/18/15 so the spool does not stick, and a concealed manual override designated N9 enables local shifting when power is unavailable. A discharge-control S2 adjustment lets technicians tailor switching time to circuit dynamics, and port Y can be exposed to 210 bar, allowing the pilot drain to join pressurized return manifolds without reliability loss.
Technical Specifications
Ambient Temp Max (nbr)
+50 °C
Cleanliness Class
ISO 4406 20/18/15
Coil Voltage
24 V DC
Electrical Connection
DIN EN 175301-803 (K4)
Hydraulic Fluid Temp Max (nbr)
+80 °C
Manual Override
Concealed (N9)
Max Flow
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port Y (dc)
210 bar
Mounting Interface
ISO 4401-07-07-0-05
Nominal Size
NG16
Pilot Oil Return
External
Pilot Oil Supply
External
Seal Material
NBR
Switching Time Adjustment
Discharge Control (S2)
1620 Old Apex Road
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