Venting and inhalation pressures of the breather valve
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A colleague said. The fixed exhalation and inhalation pressures of the breathing valve are set at three levels: 1. Exhalation at a positive pressure of 1780 Pa, inhalation at a negative pressure of -295 Pa ； 2. Exhale at a positive pressure of 980 Pa, inhale at a negative pressure of -295 Pa ； 3. Exhale at a positive pressure of 395 Pa, inhale at a negative pressure of -295 Pa ； But I can’t find any evidence; what exactly is it? What is the basis then? Please give me some advice, expert!
This post was last edited by bfdlwolf on 2020-7-2 at 14:22. \"Vent valves for oil storage tanks\" (SY/T 0511-1996): 1. Exhale at a positive pressure of 1765 Pa, and inhale at a negative pressure of -295 Pa； 2. Exhale at a positive pressure of 980 Pa, inhale at a negative pressure of -295 Pa ； 3. Exhale at a positive pressure of 355 Pa, inhale at a negative pressure of -295 Pa ；