A safety valve needs to be installed in a negative pressure tower, right?
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Does a negative pressure tower require a safety valve? What are the criteria that determine whether one is needed or not?
Set process treatment and positive pressure test
It must be installed; under normal operating conditions, negative pressure is used, but in abnormal conditions, overpressure can occur (such as an increase in the heat medium or a shortage of coolant). Therefore, it is necessary to have this installation
Protective measures are necessary, but they don’t have to be conventional safety valves; polypropylene has a self-priming back-pressure device that comes into action when negative pressure exceeds a certain level.
It must be set; even during pressure testing, it should be under positive pressure, and a pressure retention test is also required