Bosch Rexroth | 4WEH16D7X6EG24N9DA
4WEH16D7X/6EG24N9DA
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The 4WEH16D7X/6EG24N9DA valve is built by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic flow in automated circuits and is actuated electrically for machine control. A nominal size of NG16 establishes port dimensions suited for medium-to-high flow loops. The valve passes up to 300 l/min so pumps can drive large cylinders without restriction. A maximum pressure of 280 bar at ports P, A, and B supports high load holding forces. Its solenoid coil operates at 24 V DC, permitting integration with common industrial power supplies. A concealed manual override lets maintenance staff shift the spool during commissioning while protecting the button from accidental use. External pilot oil supply through port X keeps control pressure independent of main line fluctuations, and external pilot return at port Y removes pilot oil without raising tank back-pressure. Reliable switching begins at a minimum pilot pressure of 14 bar, ensuring consistent movement even in low system pressure conditions.
The pilot circuit tolerates up to 250 bar, giving the unit a wide control range before auxiliary components are needed. Port T is rated for 250 bar so return flow can share the same high-pressure environment as the work lines. Port Y is limited to 210 bar in direct-current service, defining the safe ceiling for pilot oil discharge. Fluid cleanliness must comply with ISO 4406 (c) 20/18/15 to protect the spool and reduce wear. The mounting interface follows ISO 4401-07-07-0-05, allowing the valve to bolt onto standard subplates or manifolds. Installation uses M10 × 60 screws according to ISO 4762, and each fastener is tightened to 58 Nm to prevent leakage. A mass of 8.5 kg permits one-person handling during assembly while still providing the rigidity required for repetitive duty.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Coil Voltage
24 V DC
Manual Override
Concealed
Max Flow
300 l/min
Max Pilot Pressure
250 bar
Max Pressure (p, A, B)
280 bar
Max Pressure (port T)
250 bar
Max Pressure (port Y)
210 bar (DC)
Min Pilot Pressure
14 bar
Mounting Interface
ISO 4401-07-07-0-05
Mounting Screws
M10 x 60 (ISO 4762)
Nominal Size
NG16
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Screw Tightening Torque
58 Nm
Weight
8.5 kg
1620 Old Apex Road
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