Is it necessary to install a safety valve for equipment with vacuum operating pressure?
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Vacuum equipment may also experience abnormal working conditions and cause overpressure. Is it necessary to install a safety valve?
Such equipment generally does not have a safety valve
As far as I know, safety valves all provide positive pressure protection. When the system is over-pressured, it will take off and release part of the pressure. Because positive pressure and overpressure can lead to serious consequences of physical explosions. The consequence of negative pressure and overpressure is that the container will collapse. Therefore it is better to use bursting discs.