butterfly valve, also known as the flap valve, control valve is a kind of simple. The switch control of butterfly valve and can be used for low pressure pipeline medium, refers to a kind of closed valve ( Disc or disc) Shaft rotation, it around the valve opened or closed. The valve can be used to control the flow of the fluid, such as air, water, steam, all kinds of corrosive medium, mud, oil, liquid metal and radioactive medium.

several common classification methods are: butterfly valve according to the connection form: the wafer butterfly valve and flanged butterfly valve; According to sealing form: soft sealing butterfly valve, hard seal butterfly valve; According to the structure forms: center line butterfly valve, eccentric butterfly valve; According to the mode of transmission: handle butterfly and turbine butterfly valve, pneumatic butterfly valves, electric butterfly valve;

in addition, depending on the pressure and material, there are different types of butterfly valve. Butterfly valve size is also the main factors influencing the price of butterfly valve, because of the specifications of the butterfly valve including butterfly valve of the main technical parameters of information, the major parts material and the butterfly valve size information accordingly. The price of butterfly valve is affected by the above information. It is mainly used for cutting and throttling pipe. Butterfly valve opening and closing of the part is butterfly butterfly plate, around its own axis rotation inside the body, achieve the goal of open, closed or adjustment.

resilient valve double flanged gate valve processes have been widely used to produce resilient seal gate valve such as os&y valve, os&y gate valve, and os & y valve fire protection etc.
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