Made of cast gray iron, ductile iron, cast steel, aluminum, stainless steel or other materials, handle type butterfly valve is a simple tool used in the gas pipeline of sulfuric acid industry and chemical, petrochemical, metallurgical, pharmaceutical, etc. of the sulfuric acid system.
The plate of the manual butterfly valve is installed in the pipe diameter direction. In the cylindrical channel of the valve body, the disc-shaped plate will rotate around the axis within the angle between 0 degrees to 90 degrees. When the rotation is 90 degree, the valve would be in the fully open state.
Only composed by few parts, butterfly valve has the advantages of simple structure, small size and light weight. 90-degree rotation to achieve quick on and off, easy operation and good fluid control feature. There are two kinds of seal types: elastic seal and a metal seal. For elastic sealing butterfly valve, seal ring can be mounted on the body or attached to the disc periphery; and for metal seal valve, though it has longer service life, it is difficult to seal completely. The metal seal can adapt to the higher operating temperature while an elastic seal is limited by the temperature.
If a butterfly valve is used for flow control, then you need to choose the right size and type. The structure principle of the butterfly valve is particularly suitable for the production of large diameter valves. A butterfly valve is not only widely used in the oil, gas, chemicals, water treatment and other general industries, but also for the cooling water system of thermal power plant.