What are the definitions of vacuum degree, residual pressure, as well as atmospheric pressure and absolute pressure? How can they be converted into one another?
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As the title suggests: let’s discuss this, with a focus on what residual pressure is
Absolute pressure = Gauge pressure + Atmospheric pressure. Vacuum level = Atmospheric pressure – Absolute pressure (a positive vacuum level indicates negative pressure, that is, a pressure lower than atmospheric pressure). As for residual pressure, this is a specialized term used in the electrical industry； This is the first time I’ve heard of it in the chemical industry; please forgive my limited knowledge. Could it refer to residual pressure, or leftover pressure, “remaining pressure”? ? ?