Bosch Rexroth | 4WRTE25E350L-4X6EG24K31A1M
4WRTE25E350L-4X/6EG24K31/A1M
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The 4WRTE25E350L-4X/6EG24K31/A1M valve belongs to the 4WRTE Directional Control Valves series and is produced by Bosch Rexroth for closed-loop hydraulic automation. It is built in nominal size NG25, allowing it to handle mid-range line sizes without additional adapters. A rated flow of 350 L/min at a 5 bar differential supports rapid actuator movement, and the flow is governed by a linear characteristic spool so delivered volume changes proportionally with the command signal. The spool overlap is set at +15 %, providing a defined neutral dead band that limits unintended drift. Working ports p, a, and b tolerate pressures up to 350 bar, while the external return line at port T can withstand 250 bar. External pilot oil supply and external pilot oil return keep control fluid separate from the main circuit to improve dynamic response. NBR seals maintain leak-tight operation with common hydraulic oils.
Electronic control is achieved through a ±10 V interface that lets a motion controller position the spool with analog precision. The solenoid assembly draws a maximum of 1.6 A, so the drive card must deliver adequate current under all operating states. Internal electronics are powered from a 24 V DC nominal feed and remain functional between 18 V DC and 35 V DC to tolerate voltage fluctuations on the machine bus. Wiring is completed with a DIN EN 175201-804 plug coded K31, which standardizes field installation across multiple valve types. An IP65 housing protects the coil and on-board sensors from dust and low-pressure water jets, enabling direct mounting on production equipment without a secondary enclosure.
Technical Specifications
Control Interface
±10 V (A1)
Current Consumption (max)
1.6 A
Electrical Connection
DIN EN 175201-804 (K31)
Flow Characteristic
Linear (L)
Max Operating Pressure (p/a/b)
350 bar
Max Return Pressure (port T, External)
250 bar
Nominal Size
NG25
Pilot Oil Return
External
Pilot Oil Supply
External
Protection Class
IP65
Rated Flow (Δp 5 Bar)
350 L/min
Seal Material
NBR
Spool Overlap (symbol E)
+15%
Supply Voltage (nominal)
24 V DC
Supply Voltage Max
35 V DC
Supply Voltage Min
18 V DC
1620 Old Apex Road
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