Product characteristics and benefits

• Resilient seated
• With flange end acc. to EN 1092-2
• Single chamber air valve in compact design
• Customized discharge capacity due to individually calculated orifice
• Triple function air valve
• Venting function:
• Large orifice to vent high quantities of air during draining the pipeline
• Large calculated orifice for controlled venting of defined quantities of air when filling the pipeline
• Small orifice to release low quantities of air during operation under pressure
• Minimum operation pressure: 0.3 bar
• With mounted VAG Butterfly Valve Lug-type with handlever
• Prevents vacuum and reduces pressure surges after power failure at pump stations
• Controls the filling quantity of the pipeline when unregulated pumps start up
• 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 1.4571
• Float: Stainless steel 1.4571 (exception: DN 50 synthetic)
• Sealing: EPDM
• Body of butterfly valve: Ductile cast iron EN-JS 1030 (GGG-40)
• Disk of butterfly valve: Ductile cast iron EN-JS 1030 (GGG-40)
• Orifice plate: Stainless steel 1.4021

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.