What is a marine pump?
Marine pumps are used to move or circulate sea water. For example, they are used in large salt water tanks that house marine life where it's important to make sure that the water is continuously circulated so that it stays clean, fresh, and livable for the animals or plants.
In other cases, these pumps may be used to move sea water out of an area for purposes of construction or pollution control, or they may be used on boats, ships, or submarines to get rid of flood water that enters the vessel, or to move ballast or bilge on the vessel.
How do they work?
Because sea water is highly corrosive, marine pumps need to be much more corrosion resistant than standard pumps, and they must contain parts and pumping mechanisms that are less susceptible to wear and tear. Also, many are considered submersible pumps.
They may be centrifugal pumps or positive displacement pumps. Positive displacement types are usually flexible impeller pumps made with rubber impellers that are not susceptible to corrosion. Many marine pumps also contain a filtering element that prevents any solids in the water from entering the pumping chamber and potentially clogging up the inner workings.
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