Hydronic circulator pumps are mostly found inside the closed hot water home heating systems. Hydronic circulator pumps helps in circulating hot water in the heating system and it works in combination with boiler, hydronic zone valves and thermostats for heating/cooling your home.
Hydronic circulator pumps used for residential use are small centrifugal type pumps that are electrically powered. They are typically made out of cast iron. You can locate them usually near the boiler and in series with the hot water piping.
Hydronic circulator pumps are sealed units with an internal motor, bearings and impeller, thus making them less prone to leakage and breakdown. They are typically installed in series with the boiler, hydronic zone valve and hot water heating.
When the thermostat indicates that heat is required, the zone valve is opened, the circulating pump is activated and hot water is circulated through the hot water heating system. As the water cools the boiler turns on and reheats the water in the closed loop hot water heating system.
Hydronic circulator pump is not only used for home heating systems but is also used for supplying on-demand hot water for the home’s domestic hot water needs. This pump is able to provide continuous hot water through the home hot water supply lines. Therefore, whenever a hot water faucet is turned on, you can immediately receive hot water. This helps in preventing the wastage of water but a lot of energy gets wasted in heating the water constantly that is rarely used.
In case, you want to use a circulator pump for your home’s hot water system then you must insulate your hot water supply pipes or set a timer on your system so that you could lessen the wastage of energy.
For measuring the performance of a circulator pumps, you can measure its flow performance. The flow performance is determined by determining the flow-rate (number of gallons/liters of water that can be pushed through the system per minute) and the circulator pumps head pressure.
Head pressure rating means the maximum height the pump can lift the water. In case, you have a large hot water system in which water is required to go above two- three floors then you require a circulator pump that has higher flow performance with a high head pressure.
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