1. The manual part can be made of steel plate pressed handle or stainless steel cast handle. The handle is provided with a limit structure to set the limit at the position where the valve is opened and closed. When the valve is used on the key device, the limit block is provided with a keyhole to lock the position of the switch to avoid misoperation. The handle has obvious on and off marks.

2. The stem is forged and modulated as a whole, and its hardness reaches HB220 ~ 250. The valve stem is connected with the handle by the flat key or spline key or the square contract. The valve stem is provided with a blowout proof structure.

3, the valve packing choice of braids, flexible graphite seal ring or tetrafluoroene seal ring, so that the valve stem in a certain degree of lubrication to achieve reliable sealing.

4, according to the need, the ball valve can be designed to prevent static structure, in the ball and valve stem, valve stem and valve body set conductive spring, avoid static ignition ignited flammable substances, to ensure the safety of the system.

5. Sealing pairs take various forms. According to different working conditions can choose soft seal, hard seal, fireproof seat structure; The form below DN150 is float ball and the form below DN200 is fixed ball.