Which type of pump is commonly used in large controlled circulation boilers?

Large controlled circulation boilers typically utilize vertical centrifugal pumps due to their efficiency in handling high flow rates and their ability to maintain a steady and controlled flow of water or steam within the system. These pumps are designed to provide the necessary pressure and flow characteristics required for effective heat transfer and circulation in a boiler system.

Vertical centrifugal pumps have a robust construction that allows them to operate efficiently even under varying pressure conditions, making them well-suited for the dynamic environment of a boiler system. Their vertical design provides a space-saving advantage, which is particularly beneficial in large installations where space may be limited.

Furthermore, these pumps can be easily maintained and serviced, which is essential in an industrial setting where reliability and uptime are critical. Their ability to handle solids and liquids without clogging issues further enhances their suitability for boiler applications.

In contrast, submersible pumps are designed primarily for pumping water from deep sources and may not deliver the high pressures required in boiler systems. Reciprocating pumps, while capable of generating high pressure, are less efficient and may require more maintenance compared to centrifugal designs. Diaphragm pumps, although useful for specific transfer applications, generally do not match the high flow and pressure capabilities of vertical centrifugal pumps required for effective boiler operation.