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Water VAG DUOJET® Automatic Air Valve
Single-chamber type

Product characteristics and benefits PN 10/16/25/40 - DN 50...200

• Resilient seated KAT-A 1912
• With flange end acc. to EN 1092-2
• Single chamber air valve in compact design Tests and approvals
• Very high discharge capacity up to sonic velocity due to stabilised floater • Final inspection test acc. to EN 12266
• Triple function air valve
• Venting function: (DIN 3230 Part 4)
Note
- Large orifice to vent high quantities of air during draining the pipeline For proper installation and safe operation
- Large orifice to release high quantities of air during filling the pipeline please follow the installation and operation
- Small orifice to release low quantities of air during operation under pressure instructions:
• Outlet female threaded acc. to DIN ISO 228 KAT-B 1912
• Minimum operation pressure: 0.3 bar
• With sidewise drainage plug

Materials

• 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 (exception: DN 50 - PN 10/16 synthetic, from PN

25 of 1.4571)
• Sealing: EPDM

Corrosion protection

• Inside and outside epoxy coating acc. to GSK guidelines

Versions

• Standard version as described
• For pressures of 0.1...1 bar special seal (with special sealing). Please specify

operating pressure when inquiring/ordering.
• For flange dimensions acc. to ANSI class150
• With insect protection
• DN 50/PN 16 connection with 2" thread available on request

Field of Application

• Chamber installation
• Installation in plants

Field of application Pressure test acc. to EN 12266

DN PN Maximum operating Maximum operating Test pressure body with Test pressure seat with
pressure temperature for neutral water water
liquids
50...200 [bar] [°C] [bar] [bar]
50...200 44 44
50...200 40 40 50 37.5 37.5
200 25 25 50 24 24
16 16 50 15 15
10 10 50

We reserve the right to make technical changes and use similar or Air Valves and Control Valves · 1
higher-quality materials. Drawings are non-binding. • www.vag-group.com
Edition KAT-A_1912_DUOJET_en_1-5-1
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