Bosch Rexroth | 4WRTE16V125L-4X6EG24EK31A5WB15M
4WRTE16V125L-4X/6EG24EK31/A5WB15M
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The 4WRTE16V125L-4X/6EG24EK31/A5WB15M valve belongs to the 4WRTE Directional Control Valves series manufactured by Bosch Rexroth for electrohydraulic automation where precise flow direction is needed. It is built to the NG16 nominal size, and the ISO 4401-07-07-0-05 porting pattern allows direct mounting on matching subplates. Each P, A, B, and T port has a 20 mm diameter to carry the rated flow, while internal pilot oil supply taps the system line for actuation. Pilot oil returns externally through Port Y, giving the designer freedom to route pilot fluid to tank. Electrical actuation relies on a 24 V DC coil that accepts a ±10 V command signal in the A5 variant, and wiring is completed with a DIN EN 175201-804 connector. Response sensitivity is ≤ 0.05 %, so small voltage changes translate into proportional spool movement for accurate cylinder or motor control.
System repeatability is supported by hysteresis limited to ≤ 0.1 %, reducing position error during directional changes. The main ports P, A, and B can operate at pressures up to 350 bar, and the external pilot return at Port T tolerates 250 bar, while an internal return path must remain below 10 bar to prevent backpressure. Clean hydraulic media conforming to ISO 4406 (c) 18/16/13 is required to maintain spool clearance and prevent wear. An integrated sensor monitors spool position, enabling closed-loop feedback to the drive electronics. The assembled unit weighs 11.2 kg, a factor to consider when selecting mounting hardware and support structures.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 18/16/13
Coil Rated Voltage
24 V DC
Command Signal
±10 V (A5)
Electrical Connector
DIN EN 175201-804
Hysteresis
≤ 0.1 %
Max Operating Pressure (p, A, B)
350 bar
Max Return Pressure Port T (ext Pilot Return)
250 bar
Max Return Pressure Port T (internal)
<10 bar
Nominal Size
NG16
Pilot Oil Return
External (Port Y)
Pilot Oil Supply
Internal
Port Diameter (a, B, P, T)
20 mm
Porting Pattern
ISO 4401-07-07-0-05
Response Sensitivity
≤ 0.05 %
Spool Position Monitoring
Yes
Weight
11.2 kg
1620 Old Apex Road
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