Leakage Test of PSV Using Water
• Test medium is ambient water stabilized without visible flow.
• Inlet pressure is increased to test pressure.
• Valve mounted vertically on water test stand.
• Test pressure set at 90% of set pressure for valves over 50 PSI.
• Leakage rate limited to 10 CPM per inch of nominal inlet size.
• Soft-seated valves have 1 minute leakage.