Smc Pneumatics VH402-N04 Rotary Air Valve 0.5 in Npt

Product Description

The SMC PNEUMATICS VH402-N04 is a manually operated rotary air valve designed for compressed air and pneumatic system applications. It uses a quarter-turn rotary lever actuator for direct hand operation, requiring no external power or pilot signal to switch flow states. The valve features a 0.5 inch NPT outlet connection and a Cv rating of 3.1, indicating solid flow capacity for its port size. Licensed HVAC technicians, industrial service technicians, and pneumatic system installers typically specify and install this valve in control and shut-off applications where a simple, reliable manual valve is required.

This valve is suited for use in pneumatic control circuits, air distribution panels, compressor output lines, and equipment isolation points in both light industrial and commercial settings. Its two-position design and 1/4-turn handle movement make it straightforward to operate and easy to verify visually as open or closed. The hand-activated lever requires no tools for normal operation, making it practical in service and maintenance scenarios where frequent manual cycling is expected.

Key Features

• Quarter-turn rotary lever actuation for fast, positive open and close operation
• 0.5 inch NPT outlet connection for standard threaded pneumatic line integration
• Cv rating of 3.1 supports reliable airflow capacity for the port size
• Two-position valve design provides clear open or closed states
• Hand-activated with no external power or pilot signal required
• Minimum working temperature of 23 degrees F for use in cold-environment installations

Compatibility

Designed as an OEM-style manual shutoff and control valve for pneumatic systems using standard 0.5 inch NPT threaded connections in compressed air distribution and equipment control circuits.

Installation Notes

Installation should be performed by a qualified pneumatic systems technician or licensed mechanical tradesperson. Depressurize the air line completely and lock out the compressor supply before installing or removing the valve. Apply appropriate thread sealant to NPT connections per the system requirements and applicable mechanical codes. Do not exceed the rated working pressure or temperature range of the valve during operation.