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Pinch valves used as shut-off valves in processing recycled glass

A manufacturer of glass containers and glass bottles for the food & beverage industry uses DN 100 pinch valves from the VF series from AKO Armaturen in the production of recycled glass bottles. The AKO pinch valves control the transport of the additives required in this process.

The company produces various innovative glass packaging in a diverse range of forms, sizes and colours and places its focus on the processing of waste glass.

The waste glass to be recycled is delivered to the plant in shards and processed into new glass bottles for the food & beverage industry in blast furnaces. Pinch valves from the VF series, which are fitted with a highly resistant sleeve made out of natural rubber, control the transport of the delivered additives required for the glass production such as soda, limestone, sodium sulphate, etc.

Is your application also in the field of glass production?
Our pinch valves can be used for a wide variety of applications in a diverse range of production steps!


To ensure that the additives remain free of impurities, the pinch valves are kept in a closed state through a constant supply of compressed air. The valves are only opened to enable the media to be removed from or delivered to the storage silos.

The manufacturer has used pinch valves from the company AKO Armaturen since 1991. The very robust sleeves in the pinch valves have to be replaced here on average every 6–12 months. The maintenance manager commented: “We are very happy with the installed pinch valves from AKO.” And he is willing to even go one step further: “If we can manage to improve the quality of the conveyed media provided by our suppliers then we can surely improve the already long service lives of the sleeves even further”.

AKO pinch valves used as shut-off valves for additives in glass recycling
VF100.03X.31.30LA pinch valves control the transport of additives in the processing of recycled glass


  • The valves must have anti-abrasive properties so that they can control abrasive additives.
  • The valves must be capable of a normal operating state of “closed”.

Goals achieved:

  • The pinch valves were fitted with an anti-abrasive sleeve made out of natural rubber that is resistant to abrasion from the controlled additives.
  • Pinch valves can be easily supplied with compressed air so that they are kept closed. This does not generally have any negative impact on their operation.

Additives for glass production
(Soda, lime, ash, dolomite, etc.)

Processing temperature:
Ambient temperature

Opening and closing cycles:
Approx. 30 per week

Normal position:

Operating pressure:
Approx. 1.0 - 1.5 bar

Control pressure:
Approx. 2.5 - 3.5 bar

Experience with pinch valves:
More than 25 years

Valve configuration:
Nominal size: DN 100
Series: VF
Housing: Aluminium (painted)
Connections: Flange, aluminium (painted)
Sleeve: Natural rubber, anti-abrasive

Valve designation:

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