Backwashing of the tube side of the heat exchanger
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Hello everyone. I noticed that in some heat exchangers, the tube side uses circulating water, and there is a drain valve and an exhaust valve on each of the supply and return lines. I can understand the function of these two valves, but why are there two drain valves symmetrically placed at the top and bottom of the other section of the tube side in the heat exchanger? Also, I noticed that when the heat exchanger is backwashed, there are sometimes two tubes in the tube side, sometimes one, and sometimes none. Is there any pattern to this?
It’s best to send a picture. Literally, it seems to be used for venting steam and liquid from the heat exchanger itself (after the heat exchanger has been removed)!
It’s best to send a picture. Literally, it seems to be used for venting steam and liquid from the heat exchanger itself (after the heat exchanger has been removed)!