? ?The ASME requires that valve be set at a " pop point". The ASME refers to this as set pressure. This point is higher than the traditional Circle Seal definition of cracking pressure.
These valves are not certified for steam and liquid service.
Circle Seal valves offer leakproof maintenance free service and and precision control. Circle Seal valves are absolutely bubble tight at any differential pressure in leakage tests.
Zero Leakage to 95-98% of cracking pressure
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