The Canton type internal thread ball valve produced and sold by Huadian Pump Valve Company has simple structure, small size, light weight, small flow resistance and good energy-saving effect. And the price is economical. The direction of fluid inlet and outlet of the valve can be arbitrarily selected, with a two-way effect. Both horizontal and vertical pipes can be installed. Easy to operate, fast switching, the handle only needs to turn 90 degrees to achieve switching.