Butterfly valve is a kind of regulating valve with simple structure, which can be used for switching control of low-pressure pipeline medium. It refers to a valve whose closing member is a disc that rotates around the valve shaft to open and close.
Valves can be used to control the flow of air, water, steam, various corrosive media, mud, oil, liquid metals, radioactive media and other types of fluids. It mainly cuts and throttles pipes. The opening and closing part is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjustment.
It is a valve that opens, closes or regulates the flow of a medium by reciprocating a disc switch element approximately 90 degrees. It not only has simple structure, small size, light weight, low material consumption, small installation size, small driving torque, simple and fast operation, but also has good flow regulation function and closed sealing characteristics. It is one of the fastest growing valve varieties in the past decade. The types and quantities of its uses continue to develop in the direction of high temperature, high pressure, large diameter, high sealing performance, long service life, excellent adjustment characteristics and one valve for multiple purposes. Its reliability and other performance indicators have reached a high level.
Suitable for flow regulation. Since the pressure loss in the pipeline is large, about three times that of the gate valve, the influence of the pressure loss on the pipeline system should be fully considered when selecting, and the strength of the butterfly valve under the pressure of the pipeline medium should also be considered when it is closed. In addition, the operating temperature limitations of the elastomeric seat material at high temperatures must also be considered.
Butterfly valve has small structural length and overall height, fast opening and closing speed, and good fluid control characteristics. This structural principle is most suitable for the manufacture of large diameter valves. When it comes to controlling the use of flow, the most important thing is to choose the right size and type so that they can function properly and efficiently.