Tag Archives: Pump

Boiler Components: Boiler Circulator Pump

Boiler Components: Boiler Circulator PumpThe boiler circulator pump induces the flow of hot water through the boiler and the boiler loop. Usually the boiler circulator pump is controlled by the boiler aquastat however there are various levels of control that can be found that control circulator pumps. One way is by the boiler aquastat as mentioned above. Another way is by an end switch in a zone valve. A thermostat in a particular zone will call for heat and the thermostat calls for the >zone valve to open. When the zone valve is fully open an end switch closes the circuit to energize the circulator pump. Typically, the circuit is a control circuit so when the end switch closes it closes the circuit for a relay to energize the circulator pump

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Water Tower Pumps and Controls

Water Tower Pumps and ControlsWater towers maintain a ready limited supply of water for communities in the event the water main goes down. Many water towers are used for emergency situations for the fire department to have water for fighting fires and for water fire suppression systems to have a supply of water for the emergency if it should arise.

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Day Tank for a Diesel Generator

Day Tank for a Diesel GeneratorThis is a photo of a diesel generator day tank for a diesel generator. The tank has floats inside that keep the fuel level automatically topped off in the tank so when the generator starts there is a fuel supply ready to go. As the generator consumes fuel the pump activates and resupplies the tank to keep the generator fueled and running. A pump will pump the fuel from the main storage tank to supply the day tank so the generator will have a days (give or take depending on the size of the generator and the load on the generator) amount of fuel to run under normal load. The controls for the day tank are more complex than other tanks which supply fuel for generators. An automatic day tank has alarms for the fuel level – alarms for both too low and too full alarms – and manual tests procedures for testing the pumps and fuel level floats.

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Old Bell & Gossett Circulator Pump and Bearing Assembly

Old Bell & Gossett Circulator Pump and Bearing AssemblyThis very old Bell & Gossett Circulator pump and bearing assembly was found still functioning even after being flooded out several times in a basement. The pump, probably on it's last leg, is at least 20 years old and still functioning. It is unusual for an electric motor to continue to operate after being subjected to flooding. A circulator pump is comprised of an electric motor and a bearing assembly which holds the impellor. On a call for heat the pump is energized and begins circulating hot water through the hot water loop. A single pump can be used for multiple zones in a hot water loop but the capacity of the pump needs to be sized for full demand if all zones call for heat at the same time.

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Boiler Piping Plant Renovation

Boiler Piping Plant RenovationHot Water Boiler Piping for a commercial boiler application. Boiler project being renovated and getting all new DDC controls for optimum hydronic control and efficiency. Boilers are an excellent way of providing good hot water heat to a large building or community. Some people refer to them as furnaces, hot water heaters, hot water heating systems, or hot water heater but the proper name is to call them hot water boilers. Hot water gas boilers provide clean draftless hot water heat through pipes and piping systems which HVAC professionals refer to as hydronic piping. Typically, hot water heating systems use pumps or circulators to move the water through the hot water piping system. Hot water heat is considered to be a good source of draftless heat by the people who have these hot water heating systems installed in their homes and businesses.

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