The highly elastic hose sleeve anchored in the valve housing is surrounded by the so-called control chamber. If compressed air is applied to this space, the hose sleeve, which is initially round, deforms, becomes oval and then folds flat in a predetermined position. The pinch valve is now closed as long as the control pressure continues.

The pinch valve can be controlled with a proportional pressure controller (PPC). This allows flows or bulk materials to be dosed.

Special versions of HO-Matic pinch valves are also ATEX-compliant and approved for Ex zones 0, 1, 2, 20, 21 and 22. You can also find the necessary declaration of conformity on our website (download). note: ATEX-compliant sleeves are always black!

From approx. 2.5 bar differential pressure (control pressure minus operating pressure), the HO-Matic pinch valve closes air-tight, even with bulk goods and solids. Possible thanks to the closing distance. The elastomer sleeve closes over a longer area and gently encloses the conveyed material.

Our valves are largely free of dead space. The patented QSV series is particularly noteworthy here, in which nothing other than the mirror-smooth elastomer comes into contact with the medium.

The required control pressure (from the compressed air network) of the pinch valve depends on the rubber quality and diameter of the sleeve. Normally, all sleeves can be closed 100% with a differential pressure of approx. 2.5 bar. Only the FPM quality requires more pressure!