What is the difference between the valve’s seat pressure class and seal pressure class?
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What is the difference between a valve’s seat pressure class and its seal pressure class? And what is the difference between these and the valve’s pressure class? Please give me some advice!
Literally, seat pressure class refers to the valve seat pressure rating； seal pressure class is the sealing rating ； Pressure class is the pressure rating. There are some words I see for the first time and I don’t know what the differences are.