The electric butterfly valve has a simple structure, small volume, and light weight, and is only composed of a few parts. And it can be quickly opened and closed by rotating 90 °, with simple operation, and the valve has good fluid control characteristics. When the electric butterfly valve is in the fully open position, the thickness of the butterfly plate is the resistance of the medium flowing through the valve body, so the pressure drop generated through the valve is very small, so it has good flow control characteristics. Electric butterfly valves have two sealing types: elastic seal and metal seal. Elastic sealing valve, the sealing ring can be embedded on the valve body or attached to the periphery of the butterfly plate.
Valves with metal seals generally have a longer lifespan than those with elastic seals, but it is difficult to achieve complete sealing. Metal seals can adapt to higher working temperatures, while elastic seals have the defect of being limited by temperature.
If electric butterfly valves are required for flow control, the main thing is to choose the correct size and type of valve. The structural principle of electric butterfly valves is particularly suitable for making large-diameter valves. Electric butterfly valves are not only widely used in general industries such as petroleum, gas, chemical, and water treatment, but also in the cooling water system of thermal power plants.
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