Introduction of Canned Motor Pump

Canned Motor Pumps are a type of electric pump, specifically designed for handling aggressive or toxic fluids that require complete containment to prevent leaks and exposure. The key feature of canned motor pumps is the hermetically sealed design, which ensures that the fluid being pumped remains completely contained within the pump housing.

The construction of this pump type typically includes a hermetically sealed housing containing the motor and the pump components. The motor is cooled by the liquid being pumped, so it is important to ensure that the fluid has sufficient thermal conductivity to remove heat from the motor. One of the most important considerations when selecting a canned motor pump is the chemical compatibility between the pump materials and the fluid being pumped. This type of pumps is often used in applications where the fluid is highly corrosive or toxic, so it is essential to select a pump with materials that can withstand the chemical environment.

As a leading manufacturer of canned motor pumps, SeFluid offers a wide range of products suitable for various applications. Our pumps are available in different sizes and configurations, and we offer customization options to meet specific customer requirements. With our extensive experience in the industry, we are committed to providing high-quality canned motor pumps that deliver reliable performance and long service life.

Working Principle of Canned Motor Pump

Canned motor pumps work on the principle of centrifugal force. They consist of an electric motor and a pump mounted inside a hermetically sealed housing. The motor drives the impeller, which rotates at high speed, creating a centrifugal force that propels the fluid outwards towards the pump outlet. The hermetically sealed housing contains both the motor and the pump components, ensuring that the fluid being pumped remains completely contained within the pump housing. This eliminates the risk of leaks and exposure to hazardous or toxic fluids.

The motor is cooled by the fluid being pumped, which flows through the motor casing and absorbs heat generated by the motor. This makes canned motor pumps ideal for use in applications where the fluid being pumped is highly corrosive or toxic, as they do not require any external cooling system. In addition to their hermetically sealed design, canned motor pumps also incorporate a variety of safety features to protect against over-temperature and over-pressure conditions. These include temperature sensors, pressure relief valves, and other monitoring devices that help to ensure safe operation of the pump.

Overall, canned motor pumps provide a reliable and efficient solution for handling aggressive or toxic fluids in a wide range of industrial applications. Their hermetically sealed design and advanced safety features make them an excellent choice for demanding environments where safety and reliability are critical.

Canned Motor Pump | SeFluid


Max Power: 315 kw
Max Capacity: 800 m³/h
Flow Head: Max. 800m
Max Temperature: 450℃

Types of Canned Motor Pump


Canned motor pumps provide numerous advantages, particularly in applications where leaks are unacceptable, high reliability is required, or hazardous materials are being handled. Here are some key applications of canned motor pumps:

  1. Nuclear Power Plants: Canned motor pumps are extensively used in nuclear power plants for circulating coolant in the primary and secondary circuits. They are ideal for handling radioactive fluids because of their leak-proof design and high-reliability features.

  2. Petrochemical Industry: They are used in refineries and petrochemical facilities for pumping highly flammable, toxic, or volatile liquids. The hermetic seal ensures that there’s no risk of ignition due to sparks caused by motor failure.

  3. Chemical Processing: In processes where aggressive chemicals or dangerous substances are involved, the pumps provide a safe transfer mechanism. They prevent leaks that could lead to environmental contamination or safety hazards.

  4. LNG/LPG Handling: In liquefied natural gas (LNG) and liquefied petroleum gas (LPG) facilities, canned motor pumps ensure safe pumping operations without leakage risks due to their robust containment capabilities.

  5. Subsea Applications: This type of pumps is utilized in underwater oil and gas exploration, where conventional pumps cannot be used due to depth and pressure constraints. They are designed to operate under high pressures and in challenging marine environments.

  6. Food & Pharmaceutical Industry: For hygienic and clean processes, canned motor pumps are used because they eliminate the risk of product contamination from lubricants or other fluids leaking into the pumped media.

  7. HVAC Systems: High-efficiency canned motor pumps are employed in heating, ventilation, and air conditioning (HVAC) systems for chilled water circulation, especially in critical installations where reliability is paramount.

  8. Waste Treatment: In waste treatment plants, they’re used for pumping hazardous or contaminated liquids safely, preventing leaks that might contaminate soil or groundwater.

  9. Aerospace Industry: This type of pumps is used in spacecraft cooling systems due to their compactness, high efficiency, and ability to operate in extreme conditions.

In summary, canned motor pumps find extensive use wherever high levels of safety, reliability, and leak prevention are crucial factors in pump operation. Their unique design allows for operation in environments that may be deemed too risky for standard pumps.

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