Pneumatically-actuated butterfly valves use compressed air to open and close the valve and control the flow of chemically compatible media within a system. They have a higher closing force than electrically-actuated valves and are suitable for systems moving viscous liquids. Butterfly valves are compact, lightweight, and have a slim profile that minimizes pressure drops and ensures efficient flow. General service pneumatic butterfly valves control the flow of media, such as water, steam, oil, air, and inert gas, in various industrial and commercial applications. High-performance pneumatic butterfly valves control the flow of compatible media for high-pressure applications, such as wastewater treatment, chemical manufacturing, and gas and oil. Food grade and sanitary pneumatic butterfly valves meet applicable 3-A or NSF (National Sanitation Foundation) 51 standards for use with dairy or food and beverage products.