Bosch Rexroth | 4WRAB6EB25-1XG12N9K4MR
4WRAB6EB25-1X/G12N9K4/MR
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The 4WRAB6EB25-1X/G12N9K4/MR is manufactured by Bosch Rexroth for the 4WRA Proportional Directional Valves series and is intended to meter flow and direction in hydraulic automation systems. Size 6 supports compact manifold layouts, and the valve accepts 350 bar on ports A, B, and P while the tank port tolerates 210 bar, enabling high-pressure circuits. A maximum flow of 42 l/min covers medium-duty actuators, and response sensitivity below 0.5 % allows fine adjustment at low command levels. Hysteresis remains under 5 %, promoting repeatable positioning, and the external control electronics interface (K4) provides remote signal processing. A concealed manual override is available for emergency actuation without exposing internal components.
Installation uses subplate mounting that follows the ISO 4401-03-02-0-05 porting pattern, with 8 mm port connections maintaining the rated flow path. Mounting screws must be tightened to 7 Nm ± 10 % to secure the body and prevent misalignment. An IP65 protection class shields the solenoid housing from dust and water jets, while NBR seals contain mineral-based hydraulic fluid. Fluid cleanliness must reach ISO 4406 code 20/18/15 to avoid wear on the precision-ground spool. The valve weighs 2.0 kg, making handling straightforward during installation or service.
Technical Specifications
Cleanliness Class
20/18/15 (ISO 4406 (c))
Hysteresis
<5%
Interface
External Control Electronics (K4)
Manual Override
Concealed
Max Operating Pressure (a, B, P)
350 bar
Max Tank Port Pressure (t)
210 bar
Maximum Flow
42 l/min
Mounting Screw Torque
7 Nm ±10%
Port Connection Diameter
8 mm
Porting Pattern
ISO 4401-03-02-0-05
Protection Class
IP65
Response Sensitivity
<0.5%
Seal Material
NBR
Size
6
Type Of Connection
Subplate Mounting
Weight
2.0 kg
1620 Old Apex Road
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