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    Difference between ventilation butterfly valve and hard sealing butterfly valve

    Posted by Bundor valve
    During the daily reception consultation, the editor found that many friends do not know what is the difference between the ventilation butterfly valve and the hard sealing butterfly valve? Today, Bundor Valve will give you a detailed introduction through this article.
    The difference between the ventilation butterfly valve and the hard sealing butterfly valve is that the classification of the sealing type is different. The ventilation butterfly valve is a non-sealing butterfly valve, and the hard sealing butterfly valve is a sealing butterfly valve.
    Ventilation Butterfly Valve

    It is used in the dusty cold air or hot air gas pipelines of ventilation and environmental protection projects in chemical, building materials, power stations and other industries. As a gas to adjust the flow rate, the ventilation butterfly valve should generally be installed horizontally in the pipeline, which will cause some component problems, so the failure rate is very high. Low and easy to use.
    The sealing system of the ventilation butterfly valve adopts a metal seal. Although the sealing effect is not as good as that of the elastic seal, the service life is longer than that of the elastic seal, and it has the characteristics of high temperature resistance. Therefore, it has a wide range of applications in building materials, electric power, metallurgy and other industries. In the medium transmission pipeline whose temperature is not higher than 300 degrees, the connection and closing regulation can be realized.
    Because the gap between the disc and the valve body of the ventilation butterfly valve is large, there is enough expansion space, so it can effectively prevent the thermal expansion and contraction caused by the temperature change during use, and there will be no butterfly The board is stuck.
    Hard sealing butterfly valve

    There are metal materials or other hard materials on both sides of the sealing ring. Compared with the soft sealing butterfly valve, the sealing performance of the hard sealing butterfly valve is poor, but it is resistant to high temperature and wear.
    The advantages of hard-sealed butterfly valves are high temperature resistance, wear resistance, corrosion resistance, and long service life. Hard-sealed butterfly valves mostly adopt triple eccentric structure, which can be widely used in metallurgy, electric power, petrochemical, water supply and drainage, municipal construction and other industrial pipes.