Incorporated in 1970, Process Development & Control is one of the leading manufacturers of industrial butterfly valves in the United States. Located in Coraopolis, Pa., the company manufactures butterfly valves for HVAC (Heating, Ventilating and Air Conditioning), furnace, power, blowers and exhaust air transfer systems. It also offers a range of materials for construction options and design specifications. Additionally, the manufacturer provides a variety of material compositions, size ranges and temperature levels. Process Development & Control also customizes valve products with over 300 casting patterns.