Pump selection for liquid chemical handling processes
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Which one is better, centrifugal pump or canned pump, in the loading and unloading process of liquid chemicals? What is the reason?
The canned pump is good but the price is high. Expensive things must be good. If you have money, shielding pumps are the first choice.
The advantage of the canned pump is that it has no leakage and low NPSH. The disadvantages are that it is expensive, cannot be evacuated, and is troublesome to maintain.； Therefore, if ordinary centrifugal pumps can be used, it is best not to use a canned pump to avoid troubles during operation. For expensive materials, highly toxic materials, extremely flammable materials, and materials that are easy to vaporize, you can consider choosing a canned pump.
It’s not troublesome to repair the canned pump. It’s just that the accessories are expensive. Can the centrifugal pump be pumped out?
The centrifugal pump cannot be evacuated, and the pump will fall off when air is introduced.