Why don’t vacuum phase-change hot water boilers have vacuum pumps?
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Our factory has added a Steada vacuum phase-change hot water boiler. The vacuum is created by filling the tank with water during startup, heating the vacuum chamber to make the water boil, allowing excess water to be drained away; afterward, the temperature is reduced to create a vacuum and the valve is closed. It seems rather unreliable – if the sealing isn’t good enough, the vacuum will be disrupted and re-calibration will be necessary. I checked some information – vacuum boilers all come equipped with vacuum pumps, so why doesn’t theirs have one?
It relies on negative pressure, I guess. Let’s check this again; it’s just a guess of mine
It varies from manufacturer to manufacturer; even those that do not come equipped with vacuum pumps use this approach. 1. Modern vacuum boilers have a very high level of vacuum, so there is no need to evacuate them for long periods of time. Even if vacuum restoration is needed, the manufacturer can bring their own vacuum pump, which helps to save some costs. However, good quality vacuum pumps are quite expensive； 2. It is possible that the vacuum in this company’s boiler is not created using a vacuum pump; instead, hot water is heated to boiling point so as to fill the space inside the boiler, after which the area is sealed and vacuumed, which also serves to create a vacuum. Anyway, it’s always good to have a vacuum pump, no matter what!
It’s something like this, huh; it just seems a bit unreliable. If the sealing isn’t good and there’s a leak, then one has to drive again
The boilers in this factory are of poor quality and cannot maintain a vacuum; their thermal efficiency is low. The heat exchangers are designed with copper tubes, but stainless steel tubes are used to reduce costs. It is recommended that people choose well-known brands