How to determine whether a safety valve has a diaphragm
Thread Content
If it’s possible to determine whether a safety valve has a diaphragm based on its appearance, thank you
1. Generally, a bellows-type safety valve is required when the back pressure at the outlet of the safety valve exceeds 10% of the set pressure, or when there are large fluctuations in the back pressure. Additionally, such valves are necessary when the medium is flammable, toxic, corrosive, or of similar nature. 2. The balanced bellows-type safety valve is a type of spring-loaded safety valve, in which a bellows is incorporated to balance the back pressure at the valve outlet.
From an external appearance perspective, if there is a hole in the middle of the valve cover, it is usually an internal thread hole of about 1 inch in size (this is a leak detection hole for the bellows); such a valve is of the balanced bellows type. I hope it’s useful to you.