The pinch valve is also known as clamp valve. It is a linear motion valve. Used to start, regulate, and stop fluid flow. It uses a rubber tube, also known as a pinch tube and pinch mechanism to control the fluid. This valve is the simplest in any valve design.Pinch tubes are manufactured of natural or synthetic rubbers and sometime plastics which have good abrasion resistance properties. Most pinch valves are open style in which the pinch tube is exposed.It is ideally suited for the handling of slurries, liquids with large amounts of suspended solids, and systems that convey solid material pneumatically.