Valve Leakage Class Explained: Standards, Differences, and Selection Guide – Titan Flow Valves

  At  Titan Flow Valves  (visit  https://titanflowvalves.com/ ), a premier manufacturer, dealer, and exporter of industrial valves in Mumbai, India, we emphasize delivering valves that combine precision, durability, and leak-proof performance for critical sectors such as oil & gas, power, water treatment, and chemicals. One of the most vital specifications when selecting valves is the  leakage class —the defined allowable leakage rate when a valve is fully closed. Understanding leakage classes ensures safety, compliance, and efficiency in industrial fluid systems. What is Valve Leakage Class? A  valve leakage class  represents the maximum permissible internal leakage through a valve seat under specified testing conditions, according to international standards like  ANSI/FCI 70-2 ,  API 598 , and  ISO 5208 . This classification informs engineers, operators, and procurement teams of the valve’s shutoff capability. Almost no valve can ...