Why does the cooling water for high-temperature samplers need to return by gravity rather than under pressure?
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I’ve had this question for a while, and it still hasn’t been resolved. It came to mind again today: is it a concern that if pressure drops, sampling might contaminate the circulating water, thereby contaminating the entire system? And with gravity-driven drainage, won’t the water flowing into the drain contaminate the whole system?
The specifications mention self-flow, and the drawings I saw also indicate self-flow
No, our samplers all use a cooling water circulation system.
Ugh, when I checked the specifications earlier, I couldn’t understand why it was done that way; I went ahead anyway, and then I saw a drawing that showed the same approach, which made me realize that this was indeed the way it had to be designed. But as for the reason behind it, I’m still not sure. I think pollution prevention is probably the main reason
Could the original poster share which standard it comes from?
I think that’s the case; ordinary companies don’t do such things.
I’ve forgotten the specifics; there were too many details and it was such a long time ago
Since the temperature inside the high-temperature sampler is high, the water temperature is also relatively high; when adjusting the water volume, it is possible for the water to become overheated and vaporize. If pressure-driven return water is used, water hammer can occur, which is unsafe. Therefore, a self-flowing return water method is advisable.
With high cooling water and no direct connection to the sampler interface, how could there be contamination? Agree with the explanation on the 10th floor~