What is the difference in the names of pneumatic control valves and vent valves in thermal piping systems?
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What is the difference between pneumatic control valves and thermal pipeline vent valves, and what type of sealing tests are conducted on them at the time of manufacture? Is API598 required?
It’s actually just a name; one name is determined by the context of use, while the other is based on the way in which the actuating mechanism operates. In fact, the vent valves for thermal piping systems can be pneumatic or electromagnetic – the choice depends on the requirements of the system, and the name doesn’t matter. For this sealing test, it depends on which standard is adopted; generally, the API598 standard is used ； Hehe