Should a vacuum distillation tower be equipped with a safety valve?
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The process package provided by the foreign party specifies that towers operating under negative pressure are equipped with safety valves, but according to domestic standards, it seems that only towers operating under positive pressure require safety valves. So, is it necessary to install safety valves?
It should be there. This safety valve is used for pressurization, and a certain positive pressure must also be specified!
There are some. We have some too.
The key is who can identify the specific provisions that need to be installed?
It should be operated in accordance with the regulations for pressure equipment; before use, the vacuum tower must always be pressurized to check for leaks
Yes, when exactly is it necessary to install this vacuum negative pressure safety valve? Does anyone know? Please help explain it!
Our factory’s negative pressure tower doesn’t have a safety valve; be careful not to let the pressure get too high when pressurizing it, but I think it should be fine
Ours doesn’t have a safety valve; 2NG at 0.19 MPa is used for pressurization, which meets the design pressure of the tower and prevents overpressure
Negative-pressure towers are also at risk of overpressure! When the bottom heat source is not properly controlled, or when there are issues with the vacuum system, there is a risk of overpressure. The pressure of the safety valve does not need to be very high; 3-4 bar is sufficient.
Don’t use a safety valve in non-special situations; it’s such a waste