Pneumatic Flanged Butterfly Valves

Pneumatic flanged butterfly valves combine a resilient-seated flanged butterfly valve with an AT series pneumatic quarter-turn actuator for automated isolation and general throttling duties in industrial piping systems.

The integral flanged body connects directly to mating pipeline flanges, providing a stable bolted installation for medium- and large-diameter pipelines. Compared with wafer butterfly valves, the flanged design has its own flange faces and bolt holes, which helps simplify alignment during installation and provides a more robust connection for permanent process lines.

Different body, disc, and seat material options are available to suit the process medium and operating conditions. NBR, EPDM, VITON, and PTFE seat options allow the valve to be selected for water, air, oils, compatible chemicals, and other industrial media within the applicable material limits. Stainless steel and nickel aluminum bronze disc options are also available where improved corrosion resistance is required.

Single-acting and double-acting pneumatic actuator options are available. The single-acting actuator uses air to open and spring return when the air supply is interrupted, while the double-acting actuator uses compressed air for both opening and closing. Pneumatic accessories such as solenoid valves, limit switch boxes, pneumatic positioners, FRL units, and pneumatic handwheels can be supplied according to the required control method.

Pneumatic flanged butterfly valves are commonly used in water and wastewater treatment, HVAC systems, industrial utility lines, chemical process systems, compressed air pipelines, power plants, and general fluid-handling applications requiring stable flanged installation and automated butterfly valve operation.