Whilst they are complex manufactured valves, their product is not difficult. In the event the ball is put in the same direction as the passageway, the fluid flows directly throughout the hole, meaning that the valve is open. Once the ball is put inside the hole, perpendicular to the clearway, the valve is closed and the fluid cannot pass.
Each sealing element can invariably get replaced using a spare. This enables the fast and simple adjustment of the valve, operation occurring so that one can alter the characteristics of the unit.
Of course if you prefer, then call a professional. We would be very happy to help. Our contact details are below.