How to calculate the pressure behind a steam trap to determine how high the condensate can rise
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How to calculate the pressure behind a steam trap to determine how high the condensate can rise
When selecting a trap, it is first necessary to determine the pressure difference before and after the trap, and then make the selection based on that pressure. You can first check the model, and then look up the selection table to see what the pressure difference is.
The answer to this question can be determined based on the maximum back pressure rating of the steam trap and the pressure upstream of it. However, once this level is reached or exceeded, the steam trap will no longer be able to function.
First, the pressure difference before and after the water supply valve is considered, and then the appropriate model is selected. I think I misunderstood what the original poster meant
What was said on the third floor is correct. For example, if the maximum backpressure ratio of a steam trap is 80% and the pressure before the steam trap is 10 bar, then the maximum pressure that can be reached after the steam trap is 8 bar. If the resistance (back pressure) in the condensate pipeline downstream of the check valve is not considered, it is theoretically possible to lift the condensate by 80 meters.
Classmate upstairs, I was wondering if you could provide some evidence?
I’m not sure what the basis for your statement is. The allowable back pressure ratio for mechanical steam traps is not less than 80%; refer to HG/T 20570.21-95 on the installation of steam traps (available on the forum). The maximum back pressure ratio is defined as the percentage of the highest operating back pressure relative to the highest operating pressure; refer to GB/T12250-2005 on terms, markings, and structural dimensions of steam traps. I couldn’t find it in the forum. If you want, you can contact me (we aren’t allowed to upload attachments); chuanhong@sina.com. From these two points, I can draw the conclusion I mentioned above. I’m not sure if the explanation is accurate; please feel free to offer your criticism and suggestions.