One or two pinch bars are situated horizontally above and below the sleeve.
Opening or closing of pinch valves is generally done automatically. Simple mechanism of the valves leads the highly economic solutions for the smooth flow requirements. For the pinching action of the valve, various actuators are applied. To make valve open or close hydraulic, electrical and pneumatic actuator are used. By any of the devices, walls of the pinch valves got pressurized and come together to provide tight shut-off. To operate the pinch valves electric or pneumatic systems, wheel or pinching devices are used.