Combination Air Valve for Sewage & Wastewater with Surge Protection

• Straight flow body: Higher than usual flow rates.
• Elongated body design: Prevents solids from making contact with valve’s operating parts.
• Surge Protection: the kinetic orifice is partially closed during the second stage of the air relief, preventing damage to the air valve and the system and increasing the operational time without maintenance.
• Dynamic Sealing: Prevents leakage under low pressure conditions (0.8 psi; 0.05 bar).
• Two service ports: Upper 3/4"; DN20 NPT and lower 1"; DN25 NPT, enabling back flushing and drainage.
• Compact and simple structure with fully corrosion resistant internal parts: Lower maintenance and increased life span.
• Certified to functional standards: SAI AS4883 (Australia).
• Factory approval and Quality Control: Performance and specification tested and measured with specialized test bench, including vacuum pressure conditions.

Typical Applications

• Pumping stations: Air relief, surge protection and vacuum prevention.
• Non clean water pipelines: Protection against air and gas accumulation and vacuum formation at elevations, slope change points and at road/river crossings.
• Wastewater treatment plants: Air relief, protection against air and gas accumulation and vacuum formation.