The principle of operation of the ball valve relies on overlapping the medium flow by locking element. The locking element is a ball valve with a through ball cylindrical bore. By turning the locking element on its axis – perpendicular relative to the stationary housing of the ball valve – there is an opening, or blocking the flow of fluid. Regarding the form of the holes, it may be not only circular, but also trapezoidal, rectangular or oval. The size of the opening of the locking mechanism is also different depending on the scope of application of the device and the parameters of the pipeline network.