Bosch Rexroth | 4WRKE25W6-350L-3X6EG24K31A1D3M
4WRKE25W6-350L-3X/6EG24K31/A1D3M
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The 4WRKE25W6-350L-3X/6EG24K31/A1D3M valve belongs to the 4WRKE Directional Valves series from Bosch Rexroth and regulates hydraulic flow in closed-loop automation circuits. It accepts a ±10 V electrical interface for spool commands and uses a 24 VDC supply to energize a removable coil solenoid that drives the pilot stage. The pilot oil is fed and drained externally, giving circuit designers freedom to manage pilot pressures apart from the main ports. Passageways of nominal size 25 support a nominal flow of 350 L/min at a 10 bar differential, while the main stage can pass up to 870 L/min when fully shifted. Continuous operation is permitted at 350 bar on the P, A, and B lines, and the housing follows the ISO 4401-08-07-0-94 porting pattern for manifold mounting.
Response sensitivity does not exceed 0.5 %, so small voltage changes move the spool predictably, and overall hysteresis is kept within 1 % to reduce position error in servo loops. The control electronics draw no more than 1.5 A of supply current, limiting heat generation in compact valve banks. NBR seals contain the hydraulic fluid, and an IP65 enclosure protects the electrical components from dust and water jets. The assembly weighs 16.8 kg, so supporting structures must accommodate that load during service. These characteristics allow the valve to maintain accurate high-flow regulation in presses, plastics machines, and other hydraulic equipment that require precise directional control.
Technical Specifications
Electrical Interface
±10 V (A1)
Hysteresis
≤ 1%
Max Main Valve Flow
870 L/min
Max Operating Pressure (p,a,b)
350 bar
Max Supply Current
1.5 A
Nominal Flow (Δp 10 Bar)
350 L/min
Nominal Size
25
Pilot Oil Drain
External
Pilot Oil Supply
External
Porting Pattern
ISO 4401-08-07-0-94
Response Sensitivity
≤ 0.5%
Seals
NBR
Solenoid Type
Removable Coil
Supply Voltage
24 VDC
Valve Protection
IP65
Weight
16.8 kg
1620 Old Apex Road
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