Why AKO pinch valves?

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Pinch valves control the supply of sand for the production of aluminium casting moulds in foundry

One of the largest foundries in Great Britain specialising in the processing of aluminium has used pinch valves from AKO Armaturen for more than 20 years to control the supply of sand for the production of casting moulds. The company uses pinch valves from the VF & VMC series with abrasion-resistant sleeves made out of natural rubber.

In order to cast the aluminium in the desired form, special sand casting moulds are required into which the liquid aluminium is poured. The casting moulds are produced from sand mixed with binding agent and are then destroyed after the casting process in order to reach the object that has been cast.

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The pinch valves from AKO are used to control the supply of sand for the production of new casting moulds and as quick exhaust valves in the conveying containers. The pinch valves are either opened to supply sand for the production of the casting moulds or closed to shut off the supply of sand to certain sections of the pipeline. As required, the pinch valves used to fill the funnels are either permanently open, permanently closed or complete up to 300 opening and closing cycles per day.

Alongside the pinch valves from AKO, other types of valves such as ball valves, butterfly valves or knife gate valves are also used depending on the application. According to the production manager at the factory, the company is considering completely replacing some types of valves with the valves from AKO Armaturen “due to the reliable operation and long service life of the installed pinch valves”.

Pinch valves from AKO used as control valves in the production of sand casting moulds
AKO pinch valves control the transport of sand in an aluminium foundry
VMC32.03X.50G.30Lx, VF080.03x.31.30LA & VF100.03x.31.30LA pinch valves in the production of casting moulds

Pinch valve configurator
VMC series
VF series


  • Must be suitable for many hundred opening & closing cycles per day.
  • Resistant to sand mixed with binding agent.

Goals achieved:

  • Pinch valves from AKO with their high-performance sleeves can be used in many sectors and applications where many hundred cycles are required per day. This does not have any negative impact on the reliability of the valves.
  • Sleeves made out of natural rubber with abrasion-resistant properties were installed. These sleeves can be used with the conveyed medium without any problem.

Sand mixed with binding agent

Processing temperature:
Ambient temperature

Opening and closing cycles:
Up to 300 per day

Experience with pinch valves:
More than 20 years

Valve configuration:
Nominal size: DN 25, DN 80, DN 100
Series: VMC & VF
Housing: Aluminium
Connections: Internal thread / flange, stainless steel and aluminium
Sleeve: Natural rubber, abrasion-resistant

Valve designation:

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