A pneumatic butterfly valve is an industrial valve that controls the flow of fluids by rotating a butterfly plate through a pneumatic actuator. It is often the preferred choice in most medium and low pressure, large diameter industrial applications.

Similar to other pneumatic valves, to achieve automatic control, the following accessories are required:

• Solenoid valve: Controls the on-off and direction of the air path.
• Limit switch: Feedbacks the open and closed position signals of the valve.
• Air source treatment trio: Filters, reduces pressure, and lubricates.
• Positioner: If the butterfly valve is to be used for precise proportional regulation (rather than just on-off), a positioner must be installed to precisely control the opening angle of the butterfly plate.
• Manual operation mechanism: For manual operation in case of air source failure.

• If you need a valve that is inexpensive, compact, adjustable, and suitable for large-diameter water or gas at normal temperature -> choose a butterfly valve.
• If you need a valve that can be quickly cut off, has zero leakage, provides high-pressure sealing, and is suitable for medium and small diameters -> choose a ball valve.
• If you need a valve with zero pressure loss, suitable for large-diameter high-pressure main lines, and only used for on-off purposes -> choose a gate valve.

• Water supply and sewage treatment: It is the absolute main force, used at the pump outlet, for process switching, and flow regulation.
• HVAC (Heating, Ventilation, and Air Conditioning): Controls the on-off and flow of cold and hot water, cooling water, and air.
• Food: Sanitary butterfly valves, used in material pipelines, CIP/SIP systems.
• Chemical and power: Circulating water, flue gas desulfurization, coal powder transportation, various process pipelines.
• Shipbuilding: Seawater, ballast water, fuel systems.

Pneumatic butterfly valves are the "versatile all-rounders" and "value-for-money champions" in industrial pipeline automation. They strike an ideal balance between functionality, cost, and space occupation. Although they have some limitations in high-pressure, high-temperature, and small-diameter applications, in their main battlefield - medium and low pressure, large-diameter on-off and regulation applications, they have become one of the most widely used pneumatic valves thanks to their unparalleled comprehensive advantages. Whether it's simple on-off control or complex flow regulation, you can always find a pneumatic butterfly valve that suits your working conditions.