Bosch Rexroth | 4WRKE16W8-125L-3X6EG24EK31A1D3M
4WRKE16W8-125L-3X/6EG24EK31/A1D3M
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The 4WRKE16W8-125L-3X/6EG24EK31/A1D3M valve belongs to the 4WRKE Directional Valves series from Bosch Rexroth and regulates hydraulic flow in automated circuits. A nominal size of 16 establishes the port dimensions for integration with mid-range manifolds, while a nominal flow of 125 L/min at a 10 bar pressure drop defines its baseline capacity. Internal pilot oil supply eliminates a separate feed line, and external pilot oil drain maintains stable pilot pressure under varying back-pressures. During a full stroke from 0 to 100 percent at 315 bar, the pilot stage draws 8.5 L/min, enabling consistent spool movement. A ±10 V command signal lets standard analog controllers modulate the spool position, and a 24 V DC supply voltage powers the on-board electronics. Electrical consumption reaches 72 W, a figure used for cabinet load calculations.
The main stage tolerates 350 bar on ports p, a, and b, allowing the valve to operate in high-pressure systems, and it passes up to 460 L/min to satisfy large actuator demands. Return pressure on port t can rise to 250 bar because the external drain arrangement relieves internal seals from excessive loads. Hysteresis remains at or below 1 percent, improving repeatability between command cycles, while a response sensitivity of no more than 0.5 percent supports fine flow modulation during small signal changes. A ±10 V measurement output mirrors spool position for remote monitoring. The housing carries an IP65 protection rating so it withstands dust and water spray common in hydraulic power units. A weight of 11.2 kg determines the bracket strength needed for secure mounting.
Technical Specifications
Command Signal
±10 V
Hysteresis
≤ 1%
Max Main Valve Flow
460 L/min
Max Operating Pressure (p/a/b)
350 bar
Max Power
72 W
Max Return Pressure (t, External Drain)
250 bar
Measurement Output
±10 V
Nominal Flow (10 Bar Δp)
125 L/min
Nominal Size
16
Pilot Oil Drain
External
Pilot Oil Flow (step 0–100%, 315 Bar)
8.5 L/min
Pilot Oil Supply
Internal
Response Sensitivity
≤ 0.5%
Supply Voltage
24 V DC
Valve Protection
IP65
Weight
11.2 kg
1620 Old Apex Road
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