Bosch Rexroth | 4WRAB6WA25-1XG12N9K4MR
4WRAB6WA25-1X/G12N9K4/MR
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The 4WRAB6WA25-1X/G12N9K4/MR proportional directional valve belongs to the 4WRA Proportional Directional Valves series from Bosch Rexroth and is used to meter flow and switch hydraulic circuits in automated machinery. Its nominal size is 6, and the 8 mm port bore supports the rated capacity. The connection is a subplate mounting arrangement that matches the ISO 4401-03-02-0-05 pattern, allowing direct installation on standardized manifolds. At ports A, B, and P the valve withstands up to 350 bar, while port T is rated for 210 bar, enabling pressure staging between supply and return lines. A maximum flow of 42 l/min is available across the spool for medium-capacity actuators. The component weighs 2.0 kg, so one technician can handle it during service.
System accuracy is supported by a hysteresis of less than 5 percent, an inversion range below 1 percent, and a response sensitivity under 0.5 percent, together permitting precise displacement of the controlled actuator. Fluid cleanliness must reach ISO 4406 20/18/15 to preserve spool fit and dynamic response. A concealed manual override permits emergency repositioning without exposing the mechanism to contaminants. The enclosure carries an IP65 protection class, blocking dust and water jets encountered in factory environments, and the external surface may reach 150 °C during sustained duty without impairing materials. Secure mounting is achieved by tightening the screws to 7 Nm, which maintains the seal between valve and manifold.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Hysteresis
<5%
Manual Override
Concealed
Max Pressure (a/b/p)
350 bar
Max Pressure (t)
210 bar
Maximum Flow
42 l/min
Maximum Surface Temperature
150 °C
Mounting Screw Torque
7 Nm
Nominal Size
6
Port Bore Diameter
8 mm
Porting Pattern
ISO 4401-03-02-0-05
Protection Class
IP65
Range Of Inversion
<1%
Response Sensitivity
<0.5%
Type Of Connection
Subplate Mounting
Weight
2.0 kg
1620 Old Apex Road
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