Bosch Rexroth | 4WEH16D7XOF6EG24N9ETK4
4WEH16D7X/OF6EG24N9ETK4
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The 4WEH16D7X/OF6EG24N9ETK4 valve is part of Bosch Rexroth WEH Directional Spool Valves series. It directs hydraulic flow in automated machinery. The nominal size 16 lets the unit match NG16 port patterns on manifolds. A mounting interface conforming to ISO 4401-07-07-0-05 lets installers bolt the valve directly onto subplates. Actuation is provided by a wet-pin DC solenoid, and its coil is rated at 24 V DC to integrate with common control voltages. Wiring is through a DIN EN 175301-803 K4 connector, which simplifies field replacement. A concealed manual override identified by code N9 enables local shifting without energizing the coil. Internal pilot supply and return, denoted by ET, remove the need for external pilot lines, though the circuit must furnish at least 4.5 bar to drive the pilot stage. A pilot chamber volume of 11.45 cm³ determines the amount of oil displaced during every spool shift.
The main flow paths can be loaded up to 280 bar, giving the valve headroom for high-pressure circuits, and it passes up to 300 l/min when configured for symbol D to accommodate large actuators. Pilot control components tolerate 250 bar, while the internal pilot return can reach 210 bar in DC operation without functional loss. System oil must meet ISO 4406 cleanliness class 20/18/15 to protect the precision spool fit; this level of filtration limits abrasive particles that could slow response time. M10 mounting screws are tightened to 58 Nm so the body resists vibration and pressure pulsations. A mean time to dangerous failure of 100 years reflects the reliability expected for the WEH type in safety-related installations, completing the technical profile for hydraulic automation tasks.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Coil Voltage
24 V DC
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (ng16, Symbol D)
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (internal)
210 bar (DC)
Min Pressure For Internal Pilot Supply
4.5 bar
Mounting Interface
ISO 4401-07-07-0-05
Mounting Screw Torque (m10)
58 Nm
Mttfd
100 Years (Type WEH)
Nominal Size
16 (NG16)
Pilot Oil Supply/return
Internal (ET)
Pilot Volume (2-spool Valve)
11.45 cm³
Solenoid Type
Wet-Pin DC
1620 Old Apex Road
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