Double Orifice Air Release Valve

Water pipelines can experience air accumulation during normal operation as well as large volumes of air movement during filling and draining. A double-orifice air valve uses separate small and large orifices to manage these conditions. African Valve, as a supplier of double-orifice air valves in Kenya, can provide these valves for water infrastructure requiring continuous air release, bulk air discharge and air admission.

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

• Floats: Stainless Steel 304 / 316 / 316Ti

• Orifice Components: Stainless Steel 304 / 316

• Internal Guides: Stainless Steel 316 / Engineering Polymer

• Seat: EPDM / NBR

• Gaskets & Seals: EPDM / NBR

• Fasteners: Stainless Steel 304 / 316

• Coating: Fusion-Bonded Epoxy, where specified

Typical water-service constructions use ductile iron for the pressure-containing body and stainless steel for floats and internal components, with EPDM commonly used for sealing.