How High Can My System Pressure Be Before My Valve Opens?

1.	How High Can My System Pressure Be Before My Valve Opens?
Answer» Maintain a minimum operating gap of 10% between the SYSTEM operating PRESSURE and the safety valve nameplate set pressure. Since direct spring OPERATED safety valves may “SIMMER” or “Warn” at 90% of the nameplate set pressure, and since the factory standard leak test performed at 80% of nameplate set pressure, better seat tightness PERFORMANCE can be expected with an operating gap of 20%. Maintain a minimum operating gap of 10% between the system operating pressure and the safety valve nameplate set pressure. Since direct spring operated safety valves may “Simmer” or “Warn” at 90% of the nameplate set pressure, and since the factory standard leak test performed at 80% of nameplate set pressure, better seat tightness performance can be expected with an operating gap of 20%.

Answer»

Maintain a minimum operating gap of 10% between the SYSTEM operating PRESSURE and the safety valve nameplate set pressure. Since direct spring OPERATED safety valves may “SIMMER” or “Warn” at 90% of the nameplate set pressure, and since the factory standard leak test performed at 80% of nameplate set pressure, better seat tightness PERFORMANCE can be expected with an operating gap of 20%.

Maintain a minimum operating gap of 10% between the system operating pressure and the safety valve nameplate set pressure. Since direct spring operated safety valves may “Simmer” or “Warn” at 90% of the nameplate set pressure, and since the factory standard leak test performed at 80% of nameplate set pressure, better seat tightness performance can be expected with an operating gap of 20%.

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