Ball of dual-phase ball valve is floating, under medium pressure, the ball can produce a certain displacement and squeeze the sealing surface of the outlet end, to ensure that the outlet end of the seal. 1, the flow resistance is small, the ball valve is the smallest of all the fluent resistance of a valve, even the reduced diameter ball valve, the fluid resistance is quite small. 2, the switch quickly and easily, as long as the body rotated 90 °, the ball valve to complete the full open or full close action, it is easy to achieve quick opening and closing. 3, good sealing performance. Ball valve seat (seal) generally made of PTFE and other elastic materials, easy to ensure that the seal, and the sealing force of the ball valve increases with the media pressure increases. 4, the stem seal is reliable. When the valve is opened and closed, the valve stem only rotates by 90 °. Therefore, the packing seal of the valve stem can not easily be damaged, and the valve stem sealing force increases with the increase of the medium pressure. 5, dual-phase ball valve opening and closing only 90 ° of movement, it is easy to achieve automatic control and remote control, ball valve can be configured electric devices, pneumatic devices, hydraulic devices. 6, ball valve channel smooth, easy to deposit medium, can be piggy bank.
