Bosch Rexroth | 4WRAB6EA25-1XG24N9K4MR
4WRAB6EA25-1X/G24N9K4/MR
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The 4WRAB6EA25-1X/G24N9K4/MR valve belongs to the 4WRA Proportional Directional Valves series produced by Bosch Rexroth for closed-loop hydraulic automation. It is supplied in valve size 6 so it fits compact manifolds while still handling a maximum flow of 42 l/min for precise actuator speed control. A subplate mounting connection shortens service time, and the ISO 4401-03-02-0-05 porting pattern keeps the unit interchangeable with standardized blocks. System ports a, b, and p tolerate up to 350 bar, whereas the tank port t is limited to 210 bar to protect return lines. Acceptable oil viscosity ranges from 30 to 46 mm²/s, so standard mineral hydraulic fluids can be used without loss of metering accuracy. Contamination must not exceed ISO 4406 20/18/15 because the proportional spool requires clean oil for consistent positioning. The valve can be installed in any orientation, giving designers freedom to arrange piping inside crowded power packs.
Operating reliability is maintained with hydraulic fluid temperatures between –20 and +70 °C, allowing cold-start and high-duty cycles without seal degradation. During shipping the assembly withstands –30 to +80 °C, preventing damage from extreme transport climates. A 150 °C maximum surface temperature rating confirms that the coil and housing materials endure prolonged energization. The IP65 protection class seals the enclosure against dust ingress and low-pressure water jets, so outdoor machinery can use the valve without additional covers. Mechanical durability is shown by passing a sine vibration test of 10 – 2000 Hz at 10 g for ten cycles, indicating stability on mobile equipment and presses. The unit weighs 2.0 kg, light enough for single-person installation yet robust for continuous industrial duty.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Hydraulic Fluid Temperature
–20 to +70 °C
Installation Position
Any
Max Operating Pressure (a,b,p)
350 bar
Max Operating Pressure (t)
210 bar
Max Surface Temperature
150 °C
Maximum Flow
42 l/min
Porting Pattern
ISO 4401-03-02-0-05
Protection Class
IP65
Sine Vibration Test
10–2000 Hz, 10 g, 10 cycles
Transport Temperature Range
–30 to +80 °C
Type Of Connection
Subplate Mounting
Valve Size
6
Viscosity Range
30 to 46 mm²/s
Weight
2.0 kg
1620 Old Apex Road
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