Features and Benefits Combination Air Valves perform the functions of an Air/Vacuum Valve and Air Release Valves to maintain system efficiency and prevent pipeline surges. Able to release air at high flow rates. High sensitivity: when negative pressure occurs inside pipelines, valves rapidly open to inhale large volumes of air and protect the pipelines from damage. Floating ball and main disc are in stainless steel. This provides long service life, safety and reliability. Applicable Standards Flange Standard: EN1092-2 Design Standard: AWWA C512
