Factors To Be Considered in Butterfly Valve Selection

Since the pressure loss of the butterfly valve in the pipeline is relatively large, it is about three times that of the gate valve. Therefore, when selecting the butterfly valve, the influence of the pressure loss of the pipeline system should be fully considered, and the strength of the butterfly plate to withstand the pressure of the pipeline medium when it is closed should also be considered. sex. In addition, it is necessary to consider the limitation of the working temperature that the elastic valve seat material can withstand at high temperatures. The structural length and overall height of the butterfly valve are small, the opening and closing speed is fast, and it has good fluid control characteristics. The metal seal can adapt to higher working temperature, while the elastic seal has the defect of being limited by temperature. If the butterfly valve is required to be used as a flow control, the main thing is to correctly select the size and type of the valve. The structure principle of butterfly valve is especially suitable for making large-diameter valves. Butterfly valves are not only widely used in general industries such as petroleum, gas, chemical, and water treatment, but also used in cooling water systems of thermal power stations. Commonly used butterfly valves are hard-sealed butterfly valves and soft-sealed butterfly valves. Wafer type butterfly valve uses double-head bolts to connect the valve between two pipe flanges. Flange type butterfly valve has flanges on the valve, and the two ends of the valve are flanged to the pipe flanges with bolts. Butterfly valves are widely used in metallurgy and metallurgy, electric power, petroleum, chemical, air, gas, combustible gas and water supply and drainage pipes with corrosive media where the medium temperature is ≤550℃. It is the best device for adjusting flow and cutting off fluid.