Pneumatic Ventilation Butterfly Valve

Product construction and operation

A pneumatic ventilation butterfly valve rotates a disc within a duct or low-pressure gas passage. It is selected for air-handling or process-gas service using flow, differential pressure and the required leakage performance, rather than treating it as a liquid-line shut-off valve.

Configuration features

• Disc and flanged body arrangement for duct-connected gas service.
• Pneumatic drive supports remote opening, closing or specified positioning.
• Large diameter selection requires assessment of disc load and duct support.

Selection and installation details

Nominal duct diameter alone does not determine the required actuator. Differential pressure acting on the disc, shaft friction and any deposits affect the load. Define gas composition, solids content, temperature range and operating frequency. Where flow regulation is needed, provide the operating positions and required control response. Review the duct supports and flange alignment so external loads are not transferred into the valve bearings.

Review supply pressure at the equipment while it is operating, not only the compressor setting. Select accessories and the loss-of-air response for the complete assembly.

Application fit

Ventilation ducts, compatible process-air systems and low-pressure gas flow control.

Information to include in your enquiry

Include the medium, normal and maximum pressure and temperature, connection dimensions, required operating time and quantity. For an existing installation, add identification photographs and the current assembly drawing.

Confirm the final assembly drawing, materials, ratings and control documentation for the proposed configuration before ordering. Product photographs show representative configurations.

Browse Pneumatic Butterfly Valves, use the actuator sizing checklist, or send your application requirements.