Operation problems of centrifugal pumps
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Is it necessary to use cooling water to cool the seal of the medium inside a centrifugal pump when the temperature is below 100°C? The medium is gasoline! My opinion is to use cooling water, as gasoline tends to vaporize, which can lead to the failure of the sealing surfaces. The vaporization of gasoline pushes against the sealing surfaces, causing leaks! Does a centrifugal pump need to be turned daily? If there’s no need to go to the trouble of explaining it clearly! In my opinion, it’s necessary to conduct analysis every day! One advantage is that it benefits the equipment itself; especially in winter, the fluid inside the pump tends to freeze, and turning the pump helps prevent this. Additionally, turning the pump allows any problems to be detected promptly, thus avoiding situations where a backup unit becomes unusable without anyone knowing it. Also, is it really necessary to replace the equipment inside the device once a month? Is it too frequent? The hot oil pump in my system requires the regular removal of scale from the cooling water inside the seal, which is why the pump needs to be replaced periodically!
1. Regarding your first question, it is indeed necessary to use water for cooling, lubrication, and sealing the end face, because gasoline vaporizes when heated, which causes the mechanical seal’s end face to fail – it’s not due to anything pushing it apart; are you using water under pressure or something like that? 2. Daily trading sessions – it seems unnecessary; how can it be frozen? You can drain the water from the pump using a drain pipe, or you can connect it directly to pipeline 3 for heating by the heat pump. Changing it once a month shouldn’t be considered frequent; this prevents the components from wearing out due to fatigue. Besides, old equipment left there is also prone to rusting. Answer completed
You can either drain the medium inside the pump completely or install a heating jacket.
First question: I agree with the view from the second floor – the main hazard of gasoline vaporization is the failure of mechanical seals, rather than pushing them apart. Second question: The pump units in my organization are also turned over daily, but I believe this is just a matter of different management practices among various organizations; there are many places where the pumps aren’t turned over on a daily basis. Additionally, I think turning the pumps over doesn’t necessarily have anything to do with preventing freezing! ~ Third question: Swapping the equipment of the device once a month is not very frequent; our unit also has such a rule.
Since the medium has been completely drained, there’s no need to turn the machine daily, right? If there is a medium inside the pump, turning it manually every day will cause it to freeze, as long as the turning is not done continuously.
1. When the medium inside the centrifugal pump is below 100°C, no cooling water is required to cool the seal； It doesn’t matter if the medium is gasoline, as it will not vaporize under pressure. 2. The centrifugal pump needs to be turned daily to prevent the shaft from bending ； Cranking the engine has nothing to do with anti-freezing. 3. Changing the pump once a month should not be considered frequent, to prevent the components from suffering from fatigue and failure ； Check whether the standby pump can reach a normal standby state.
Does a centrifugal pump need to be turned daily? There’s absolutely no need!
Thank you to all the seniors! The little brother knows how to do it!
There is no need to turn the pump around daily; once a month is sufficient. It is enough to drain the medium inside the pump through the drain line. Connect a pipeline for heating from the heat pump so that the temperature of the medium does not drop to a level at which it will crystallize. For media that tend to crystallize, ensure that the inlet and outlet valves of the pump are closed tightly; blow steam through the outlet drain line while keeping the inlet drain line open.
Reply 1# When Rigdang, we also turn the turbines daily in our workshop. However, turning them has a direction – it must be done clockwise; turning them in the opposite direction can easily cause damage to the mechanical seal. And a leak occurs.
Changing it once a month shouldn’t be considered frequent, as this prevents the components from becoming fatigued and failing. Besides, spare equipment left there is also prone to rusting. We change the pump here once a month.