1. The stainless steel three-way pipe fitting ball valve is in the closed position, and the valve seat pressure is tight due to the mechanical pressure of the valve stem.

2. The valve rod shall be pulled out continuously and dyed with guide pin in the spiral groove of the valve rod to prevent the ball head from being twisted due to friction.

3. Before reaching the full open azimuth, the valve rod is pulled to the limit azimuth, and the ball becomes the full open azimuth.