Series 585/586 inflatable seated butterfly valves are designed for severe applications. Valve’s heavy-duty seat has been designed for higher operating pressures and temperatures. Standard valve sizes range from 2 to 24 inches (50 to 600 millimeters) and fit both ANSI and metric flanges. Valve is suitable for abrasive materials that can reduce valve life, such as sand, feldspar, fly ash and most other dry, granular materials. Valve’s inflatable seat design uses air pressure to expand the seat against the disc, providing more sealing area and an even pressure distribution against the disc every time. Seat automatically compensates for wear when it inflates against the disc, extending valve life considerably. Valves are available in a variety of construction materials including stainless steel and aluminum.