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VAG DUOJET® Automatic Air Valve

High-capacity, single-chamber air valve with triple function for venting and releasing air in pipelines as well as for releasing air during operation, designed according to the AWWA standard. Corrosion-proof due to stainless steel inner parts (in size DN 50, inner parts made of plastic). Safe and reliable operation even at high air-release velocities of up to sonic speed. Suitable for use in water treatment, water distribution, in dams, power plants and in industry. Send offer request

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General information

Product features and benefits

  • Resilient seated
  • With flange end acc. to EN 1092-2
  • Single chamber air valve in compact design
  • Size of the inlet area correspond to the size of the outlet area
  • Very high discharge capacity up to sonic velocity due to stabilised floater
  • Triple function air valve
  • Venting function:
    • Large orifice to vent high quantities of air during draining the pipeline
    • Large orifice to release high quantities of air during filling the pipeline
    • Small orifice to release low quantities of air during operation under pressure
  • Outlet female threaded acc. to DIN ISO 228
  • Minimum operation pressure: 0.3 bar
  • With sidewise drainage plug


  • Body: Ductile cast iron EN-JS 1030 (GGG-40)
  • Bonnet: Ductile cast iron EN-JS 1030 (GGG-40)
  • Bonnet bolts: Stainless steel A4 (DIN EN ISO 3506)
  • Inner parts: Stainless steel 1.4541
  • Float: Stainless steel 1.4571
  • Sealing: EPDM

Corrosion protection

  • Inside and outside epoxy coating acc. to GSK guidelines
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