Pinch valves are used for dosing liquid and paste-like materials.
The valve is controlled by feeding compressed air into the pneumatically controlled pinch valve. When inoperative, a piston compresses a specially designed piece of tubing. By feeding in control air, the piston is raised and the medium can pass through the squeeze tube. The dosing quantity depends on the duration for which the valve is open and the medium pressure set.
The only part of the valve that comes into contact with the medium to be dosed is the disposable squeeze tube.
These dosing valves are characterised by quick and simple cleaning of wetted parts and low maintenance costs.