Three-handle ball valve is a valve manual class. The ball valve is a sphere with a circular channel opening and closing pieces, turning ball with stem opening and closing movement of the valve. Ball valve opening and closing member is a sphere with a hole, rotation around the vertical axis of the passage, so as to achieve the purpose of opening and closing the channel. The ball valve is mainly used to cut off or connected piping and equipment media can also be used for fluid regulation and control, ball valve fluid resistance is small, simple structure, small size, light weight, compact and reliable, easy operation and maintenance, will not cause the valve sealing surface erosion, wide range of applications. Nominal diameter: DN15-100mm; Connection: threaded connection; applicable temperature: -29-180 ℃ applies pressure :1.0-4 .0 mpa use medium: water, steam, oil, acetic acid and other media; Material: 304,316 , 316L stainless steel;