Butterfly Valves are simple flow control devices that use a pivoting disc to open, close, or throttle flow. Butterfly Valves provide trouble free service in many chemical, pertro-chemical, water, and power generation industries. Everest Butterfly Valves are designed and manufactured to provide control and shutoff of flowing gases, liquids, or fludized solids. These include Double Flange, Lug, and Wafer Types.