Bosch Rexroth | 4WRTE25E1-350L-4X6EG24EK31A1M
4WRTE25E1-350L-4X/6EG24EK31/A1M
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The 4WRTE25E1-350L-4X/6EG24EK31/A1M proportional directional valve is produced by Bosch Rexroth as part of the 4WRTE Directional Control Valves series. It directs hydraulic flow to actuators and lets machine controllers vary speed and force. The valve is built in NG25 size, which matches ISO port patterns for 25 mm nominal galleries. A rated flow of 350 l/min at a 5 bar pressure drop supports high-throughput circuits, while a maximum operating pressure of 350 bar allows use in heavy-duty systems. Its linear flow characteristic keeps the relationship between spool stroke and flow predictable for closed-loop control. Pilot oil is taken internally through path E, and the drained pilot oil returns externally through port Y to prevent back pressure inside the cover. An IP65 protection class seals the housing against dust and water jets during field mounting. Integrated spool position monitoring supplies real-time feedback to the motion controller and enhances functional safety.
For reliable service the hydraulic fluid must stay within cleanliness class ISO 4406 18/16/13, reducing wear on the precision spool and sleeve. The electronic card accepts a command signal of ±10 V, and its 100 kΩ input resistance minimizes loading on upstream controllers. A 24 V DC supply powers the onboard electronics, and current draw does not exceed 1.6 A, so standard machine power supplies are adequate. Electrical connection is made through a DIN EN 175201-804 plug coded K31, providing quick disconnect during maintenance. Return pressure on port T may reach 250 bar, enabling installations where the tank line carries substantial back pressure. The unit weighs 16.8 kg; this mass must be considered during hoisting and when calculating manifold support loads.
Technical Specifications
Cleanliness Class
ISO 4406 18/16/13
Command Signal Range
±10 V (A1)
Electrical Connector
DIN EN 175201-804 (K31)
Flow Characteristic
Linear (L)
Input Resistance
100 kΩ
Max Current Consumption
1.6 A
Maximum Operating Pressure (p,a,b)
350 bar
Maximum Return Pressure (t, External)
250 bar
Pilot Oil Return
External (Port Y)
Pilot Oil Supply
Internal (E)
Protection Class
IP65
Rated Flow (Δp=5 Bar)
350 l/min
Size
NG25
Spool Position Monitoring
Included (M)
Supply Voltage
24 V DC
Weight
16.8 kg
1620 Old Apex Road
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