Ball valve, GB/T21465-2008 valve terminology defined as follows: the opening and closing parts (ball) driven by the stem and around the stem axis of rotation movement of the valve. Main media used to cut off or connected piping can be used for the regulation and control of the fluid, which has a strong hard metal seat seal V-shaped valve V-shaped ball core and surfacing carbide shear force, especially for the media including fiber, tiny solid particles and other materials. Multi-way ball valve in the pipeline is not only the flexibility to control the media confluence, diversion, and flow switching, but also can turn off any channel leaving the other two channels connected. The valve in the pipeline should generally be installed horizontally. Ball valve rotated 90 degrees to the action, cock body is a sphere, a circular through-hole or channel through its axis. Ball valve in the pipeline is mainly used to cut distribution and change the media flow direction, it only needs to be rotated 90 degrees to the operation and a small torque can be closed tightly. The most suitable valve for switch shut-off valve to use, but recent development has been ball valve designed to give it throttle and control the flow, such as V-ball valve. The main features of valve is its own compact, reliable sealing, simple structure, easy maintenance, sealing surface and the spherical often in the closed state, is not easy to be medium erosion, easy operation and maintenance, applicable to water, solvents, acids, and natural gas and other general working medium, but also applies to poor working conditions of media, such as oxygen, hydrogen peroxide, methane and ethylene, has been widely used in various industries. Ball valve can be a whole, can also be combined. 
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