If an air operated AKO pinch valve is put under pressure by vacuum > -0.1bar in terms of the medium used (in the pipeline), the valve's sleeve will be deformed by the vacuum. This will have a negative effect on the product's flow rate and the life time of the AKO pinch valve sleeve.
The pinch valve sleeve can be opened or kept open by means of the AKOVAC's control unit. A vacuum mode of up to -0.8bar can be generated in the feed pipe (pipeline) in terms of the medium.
If you click on below link you will find a video (AKOVAC.flv) that shows how the AKOVAC unit can be used for the vacuum compensation.