Bosch Rexroth | 4WRKE16W8-125L-3X6EG24EK31F1D3M
4WRKE16W8-125L-3X/6EG24EK31/F1D3M
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The 4WRKE16W8-125L-3X/6EG24EK31/F1D3M directional valve belongs to the 4WRKE Directional Valves series and is produced by Bosch Rexroth for hydraulic automation tasks that demand proportional control. It is built in nominal size 16, a dimension that sets the port interface for medium-capacity circuits. The W8 spool establishes equal metering edges so cylinder motion remains balanced in both directions. A linear characteristic curve ensures that flow changes proportionally to the input current. The unit accepts a 4–20 mA command or feedback signal, allowing it to integrate with common analog controllers. A nominal flow rating of 125 L/min gives the baseline capacity used when matching actuators. Operation up to 350 bar permits use in high-pressure manifolds. Pilot oil is supplied internally, while the drain is routed externally to eliminate pilot back-pressure and keep response times predictable.
Peak demands are handled by a maximum main valve flow of 460 L/min, extending headroom above the nominal rating. Pilot pressure is stabilized by an integrated ZDR 6 DP0-4X/40YM-W80 pressure reducing valve so the main stage receives consistent actuation force. The block follows the ISO 4401-07-06-0-94 mounting pattern, making it compatible with standard sub-plates. NBR seals are fitted to work with conventional hydraulic oil and simplify replacement. An IP65 protection rating safeguards the electronics against dust ingress and low-pressure water jets, while a 24 V DC supply voltage aligns with typical machine power rails. The required oil cleanliness class of 20/18/15 indicates that fine filtration is needed to prevent spool wear. A weight of 11.2 kg informs lifting arrangements during installation.
Technical Specifications
Characteristic Curve
Linear (L)
Cleanliness Class (main Valve)
20/18/15
Command/feedback Signal
4–20 mA
Max Main Valve Flow
460 L/min
Maximum Operating Pressure
350 bar
Mounting Pattern
ISO 4401-07-06-0-94
Nominal Flow
125 L/min
Nominal Size
16 (NS16)
Pilot Oil Drain
External
Pilot Oil Supply
Internal
Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Seals
NBR
Spool Type
W8
Supply Voltage
24 V DC
Valve Protection
IP65
Weight
11.2 kg
1620 Old Apex Road
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