How can a steam trap be considered to be working properly?
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We have a steam trap here; condensate flows out from its outlet, but the pressure of the steam being emitted is also quite high. I’m not sure if this is normal. . . I’m asking the experts: what does it take for the outlet of a steam trap to be considered qualified?
Strictly speaking, there should be no steam entrainment at the outlet of the steam trap, but in actual operation, some amount of steam entrainment does occur to a greater or lesser extent. However, if steam under pressure can be seen, then it is a problem with the steam trap.
A good valve is one from which only water comes out at the outlet of the steam trap, with no air. If some air is present, it’s still acceptable to continue using it as long as the amount isn’t large; this situation occurs quite often
It depends on the type of steam trap and the steam pressure. As described by LZ, it \"sprays steam\"; if it’s of the thermodynamic type, water is sprayed out and it doesn’t trip frequently, so there should be no major problem
If the steam trap is working properly, it should release water and steam intermittently, rather than steam continuously, right?
Is the water volume high? Water has a higher density, so gas should emerge last, right?
This is my area of expertise. For steam discharged normally by a steam trap, as long as it isn’t ejected directly, the energy-saving effect is fairly good. At the moment the condensed water reaches the discharge outlet, it vaporizes due to the temperature difference, but that vaporization occurs in a rather dispersed manner
If steam is clearly seen being ejected directly, that is obviously abnormal. I wonder what type of drain valve the original poster has at home? Disk-type units often discharge steam along with the condensate, resulting in poor energy-saving performance, whereas upside-down bucket or float-type units generally do not emit any steam.
Expert, may I ask what abnormal issues can occur with a steam trap if its back pressure is too high? Is there no condensate water being discharged?
1. The condensate that comes out of the steam trap is condensate at a certain pressure and temperature; if it is discharged directly into the atmosphere, there will be a pressure drop, causing the condensate to flash. Therefore, most of the white gas we see is actually flash vapor. Of course, it’s possible that in some steam traps, due to issues with their internal components or selection, the condensate is discharged directly. 2. **Standards specify that the air leakage rate of steam traps must not exceed 3%-5%.** 3. If you have any questions, feel free to send me a private message on the forum