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nature : also known as the center of the model screw plug. A valve is the Cock Valve functions, make spool are spherical surface. Its structure shown in the figure. A ball valve contents embolization physical play the role embolism opened a circular channel. Advantages : (1) fluid resistance is small; (2) can be used for pressure or (and) high temperatures and larger diameter pipe road. Spool operation more flexible and better sealing performance, high pressure capability. Industrial production in some laboratory and have a wide range of applications. Valve in the form of a variety of forms (such as track-and-necking Culture venturi-type), which can be selected upon request. Spool Valve and the sealing ring is used for wear-resistant materials, corrosion resistant fluid pressure and temperature properties of the valve to ensure the long-term reliable operation. By rotating the ball-control stalk valve opening degree to regulate traffic, but its ability to regulate only a certain range.
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