What type are the steam-traced drain valves in refinery units? How does it work?
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What type are the steam-traced drain valves in refinery units? How does it work? Thank you! ! !
Most strainers are of the thermodynamic type; some are of the pulse type, but their performance is not very good. Many factories I’ve come into contact with recently leave the end valves of the steam condensate pipes slightly open, allowing steam mixed with a small amount of water to be discharged directly. It is said that this approach results in lower operating costs and also ensures operational safety. However, I think such a practice does not comply with the regulations regarding energy conservation, emission reduction, and environmental protection
Once winter came, many were damaged by the cold. Most are of thermodynamic form. Of course, there are also some with slightly open ends
Supply hot water and steam to prevent equipment damage from freezing
We private enterprises can’t afford imported ones; I suggest you use Armstrong’s check valve, the inverted cylinder type.
You also need to choose based on your engine capacity
There are heat-sensitive types, where the temperature of the water is lower than that of the steam, and regulation is based on temperature. There are also ball-sealing types, in which the ball floats when there is enough water, allowing water to pass through; the ball sinks when the water level drops
Generally, the diameter of steam traps used for heat tracing is relatively small, resulting in a low amount of steam discharged; bimetallic steam traps are commonly used in such applications. For those with a larger diameter, usually DN25 and above, float-type steam traps or inverted bucket types are more commonly used; the selection should be based on technical parameters such as the amount of steam to be drained and the back pressure