Ceramic Valves
Valves are essentially type of seal. There are many types of valves rotary, ball and butterfly, gate, and concentric cylinders and each of seat, these has variations. One type of rotary valve is shaped like a ball but has a hole handle that protrudes from the side. when the through it, plus a valve is with the pipe carrying the liquid. To open, the hole is lined up close the valve, the handle is rotated so that the hole is no longer lined up with the pipe but instead faces the sides of the pipe.