Detailed explanation of working principle and application of butterfly valve
The working principle of butterfly valve is based on the rotary motion of valve plate. Butterfly valve is mainly composed of valve body, valve plate, valve stem and driving device. When the driving device (such as manual, electric, pneumatic, etc.) acts on the valve stem, the valve stem drives the valve plate to rotate around the central axis in the valve body. When the valve plate rotates to be perpendicular to the fluid channel, the butterfly valve is in a closed state to prevent the fluid from passing through; When the valve plate rotates to be parallel to the fluid channel, the butterfly valve is fully opened and the fluid can pass smoothly. By controlling the rotation angle of the valve plate, the adjustment of fluid flow can be realized.
Butterfly valves are widely used in many fields. In the water supply and drainage system, it is often used to control the on-off and flow adjustment of water flow, such as urban water supply pipeline, sewage treatment plant inlet and outlet pipeline and so on. In HVAC system, butterfly valve is used to adjust air flow to ensure indoor temperature and ventilation effect. In industrial fields, such as petrochemical industry, butterfly valves can be used for pipeline control of various corrosive media and high-temperature and high-pressure fluids. Because of its simple structure, light weight, easy installation and maintenance, butterfly valves can adapt to different working conditions. In shipbuilding, butterfly valves are used to control the fuel, seawater, fresh water and other pipeline systems of ships to ensure the normal operation of ships.
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