Heavy Duty Air Actuated Butterfly Valve For Water & Waste Valves And Actuators

Butterfly Valve With Double Acing Pneumatic Actuator Heavy Duty For Water & Waste Valves And Actuators

Butterfly valves have a circular disc mounted on a shaft in the center of the valve. They are generally used in wastewater treatment for air supply systems. Butterfly valves are an economical alternative for larger valve sizes (>200 mm), because of the compact valve design, and lighter mass compared to other valves. Furthermore, they have relatively high coefficient of flow (Cv), standard face-to-face dimensions, and can be produced using chemical resistant.materials. In general, sizes available for butterfly valves range from 50 mm to 1200 mm. The butterfly valve is considered to be a high recovery valve since only the disc impedes the valve flow path. The Cv is comparatively high and pressure drop across the valve is comparatively low. Although butterfly valves are economical, they tend to foul up when used on sludges with solids/stringy materials and, therefore, do not handle slurry applications well. Especially vulnerable are the cavities around the disc stem, which can potentially entrap fluids and slurries. Due to this, unwanted contamination is possible in slurry services. These valves are normally not rated as bubble-tight, although some high performance butterfly valves may meet ASME leakage ratings