Vacuum Butterfly Valves

Vacuum butterfly valve is mainly composed of valve body, valve cover, valve stem, butterfly plate, sealing ring and other components. Relying on the driving device (such as electric, pneumatic device) to make the valve stem rotation, driven by the butterfly plate in the valve body rotating around its own axis, rotating within the range of 90 ° to achieve the valve open, close or regulate the flow rate, so as to control the fluid medium in the vacuum pipeline on and off and the size of the flow rate. When the valve is completely closed, a vacuum sealing space is formed between the butterfly plate and the valve seat to achieve vacuum sealing.