Combination Air Release Valve

Pipeline systems require effective air management during normal operation, filling and draining. A combination air release valve combines a small air-release orifice with a large air/vacuum orifice to release accumulated air, discharge large air volumes and admit air when vacuum conditions develop. Combination Air Release Valve Suppliers in Egypt can provide these valves for municipal water, irrigation, pumping and water-transmission systems.

Technical Specifications

Materials & Components

• Body: Ductile Iron EN-GJS-500-7 / ASTM A536 Grade 65-45-12

• Bonnet: Ductile Iron EN-GJS-500-7 / ASTM A536 Grade 65-45-12

• Float: Stainless Steel 304 / 316 / 316Ti

• Orifice Assembly: Stainless Steel 304 / 316

• Internal Guides & Trim: Stainless Steel 304 / 316 / Engineering Polymer

• Seat: EPDM / NBR

• Gaskets & Seals: EPDM / NBR

• Fasteners: Stainless Steel 304 / 316

• Coating: Fusion-Bonded Epoxy, where specified

Standards

For water-supply applications, EN 1074-4 provides requirements for air valves, while AWWA C512 covers air-release, air/vacuum and combination air valves for water and wastewater service. Flange dimensions, pressure class, materials and testing should be confirmed against the selected valve design and project specification.