The dispenser valves, Pinch Valves are designed to dispense low to high viscosity materials. This valve relies on a valve controller that sends a pre-programmed air signal to open the valve and allow the fluid to flow. The “ON/OFF” control is achieved by automatically opening and closing (pinching) the pinch. The tube is available in 2 types, Fluororesin and Polyurethane . The only part of the valve making contact with the fluid being dispensed is the disposable pinch tube and thus maintenance is easy. Since the V31 valve has a nozzle holder attached to it, it can be firmly positioned even when it is mounted onto an automated machine.