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 Circulation Pump Systems
A circulator pump is a specific type of pump used to circulate gases, liquids, or slushy fluids in a closed circuit. They are commonly found circulating water in a hydro-based heating or cooling system. Because they only circulate liquid within a closed circuit, they only need to overcome the friction of a piping system move fluids from one place to another.

 
Circulator pumps used in hydro-based systems are usually electrically -powered centrifugal pumps. Because they are mostly used in homes, they are often small, sealed, and possess little horsepower, but in commercial applications they range in size as well as power. In this case, the electric motor is separated from the pump body by mechanical coupling. The sealed units used in home applications often have the motor rotor, pump impeller, and support bearings combined and sealed within a water circuit. This avoids one of the principal challenges faced by the larger, two-part pumps: maintaining a water-tight seal at the point where the pump drive shaft enters the pump body.

 
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