Bosch Rexroth | 4WEH16R3-7X6EG24N9K4
4WEH16R3-7X/6EG24N9K4
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The 4WEH16R3-7X/6EG24N9K4 valve is built by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic oil in automated systems, fits size 16 cavities, and follows the ISO 4401-07-07-0-05 mounting pattern. The flow path accepts 300 l/min while ports P, A, and B sustain up to 280 bar. Spool movement is driven by a 24 V DC solenoid that connects through an EN 175301-803 K4 plug. Pilot oil enters externally through port X and returns externally through port Y so manifold pressure does not interfere with actuation. A minimum pilot pressure of 14 bar centers the spring unit, and a concealed N9 manual override enables manual shifting during maintenance.
The pilot section tolerates up to 250 bar, allowing the control line to share pressure with common pump circuits. Port T withstands 250 bar, while port Y is limited to 210 bar, establishing safe back-pressure limits on return flow. To protect internal lands, fluid cleanliness must meet ISO 4406 class 20/18/15, and NBR seals maintain sealing integrity with standard mineral oils. The valve’s mean time to dangerous failure is 100 years, which supports long-term deployment in safety-related machinery. These pressure ratings, material choices, and reliability data collectively define the operating envelope required for precise, durable service in hydraulic automation.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
EN 175301-803 (K4)
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 T)
250 bar
Max Pressure (port Y)
210 bar
Min Pilot Pressure (spring-centered)
14 bar
Mounting Pattern
ISO 4401-07-07-0-05
Mttfd
100 years
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Seal Material
NBR
Size (ng)
16
Solenoid Voltage
24 V DC
1620 Old Apex Road
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