Bosch Rexroth | 4WEH16D7X6EG24N9TDK24L2B10-SO388
4WEH16D7X/6EG24N9TDK24L2/B10 SO388
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The 4WEH16D7X/6EG24N9TDK24L2/B10 SO388 directional spool valve is manufactured by Bosch Rexroth within the WEH Directional Spool Valves series and is intended to route hydraulic flow in automated machinery. Its nominal size is 16 (NG16), providing compatibility with medium-capacity circuits, while the porting pattern ISO 4401-07-07-0-05 aligns with standard subplates for straightforward mounting. A 4-way configuration supplies separate P, T, A, and B paths so actuators can extend and retract under controlled flow. The coil operates on 24 V DC and connects through a DIN EN 175301-803 K4 plug to streamline electrical hookup. A concealed manual override lets technicians shift the spool without power during service checks. Pilot oil arrives through external port X, and after actuation it returns internally to port T, eliminating an extra drain line and reducing external plumbing.
Service limits start with a working pressure of 280 bar on ports A and B, allowing the valve to function in high-pressure circuits, and a maximum flow of 250 l/min at that pressure maintains cylinder speed on large equipment. The pilot stage withstands up to 250 bar while requiring only 14 bar at port X to initiate movement on two-spool arrangements, ensuring reliable shifting across a broad pressure window. A Ø1.0 mm throttle insert designated B10 can be installed to restrict pilot oil and soften transition shocks. NBR seals hold fluid from –20 to +80 °C so the valve remains leak-tight in cold starts and heated reservoirs, and cleanliness must meet ISO 4406 class 20/18/15 to protect the precision-ground spool and sleeve.
Technical Specifications
Electrical Connection
DIN EN 175301-803 (K4)
Fluid Cleanliness Class
20/18/15 (ISO 4406)
Fluid Temperature Range
–20 to +80 °C (NBR seals)
Manual Override
Concealed
Max Flow (p=280 Bar)
250 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (2-spool, X External)
14 bar
Nominal Size
16 (NG16)
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-07-07-0-05
Solenoid Voltage
24 V DC
Throttle Insert
Ø1.0 mm (B10)
Way Configuration
4-Way
1620 Old Apex Road
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