Circulator

Circulator pumps are pumps designed to circulate fluids within a heating system such as hot or cold water which may be mixed glycol to improve the thermal handling properties of water. A Circulator pump operates according to different pressure levels as thermostatic radiator valves are opened and closed according to heating requirements and in order to accommodate a multitude of duty points a pump with a variable speed drive is chosen to ensure the required flow and pressures are met. 

Due to the operating hours of such pumps, being as energy efficient as possible is a major factor in pump selection as when older pumps which are not efficient are replaced by newer models, the payback period can be as little as a year.