Aro/ingersoll-rand M251RS Three-way Manual Valve 0.13 Inch Npt

Product Description

The ARO/INGERSOLL-RAND M251RS is a manually operated, three-way mechanical valve designed for compressed air and pneumatic control applications. It features roller lever actuation with spring return, delivering a 0.2 Cv flow rating through a 0.13 inch NPT port. The valve operates in two positions and is rated for a maximum working pressure of 150 psi. It is typically installed by industrial technicians and mechanical contractors in pneumatic circuit assemblies where a compact, reliable manually triggered directional control valve is required.

This valve suits light-duty pneumatic systems found in manufacturing, assembly automation, and general industrial fluid power applications. The spring-return roller lever design makes it well suited for intermittent manual actuation cycles where the valve must automatically return to its default position when the lever is released. Its compact size and NPT threading simplify integration into existing pneumatic lines and manifold assemblies.

Key Features

• Three-way, two-position directional control for pneumatic circuit switching
• Roller lever actuator with spring return for automatic reset on lever release
• 0.2 Cv flow rating suitable for low-flow pneumatic control lines
• 150 psi maximum working pressure rating
• 0.13 inch NPT threaded outlet for straightforward inline installation
• Operating temperature range of 32 degrees F to 160 degrees F

Compatibility

Designed as a direct-replacement or new-installation manual mechanical valve for light-duty pneumatic directional control applications using standard NPT-threaded fittings and connections.

Installation Notes

Installation should be performed by a qualified industrial mechanic or fluid power technician. Depressurize and lock out the pneumatic system before removing or installing the valve. Use appropriate thread sealant on NPT connections without over-applying, as excess sealant can migrate into the valve body. Verify that system pressure does not exceed the rated 150 psi maximum before returning the circuit to service.