What is the maximum operating temperature for a canned motor pump?
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In vacuum systems, shielded pumps are used as tower circulation pumps; the temperature is 230 degrees, and corrosion is not a concern. Are there such shielded pumps? Is it true that canned pumps can operate at around 300 degrees, as stated online?
Yes, our company uses such shielded pumps
The operating temperature of magnetic pump exceeds 300 degrees
Shielded pumps can be classified into many types based on their structure and purpose: there is the most commonly used basic type, as well as high-temperature separation type, self-priming type, slurry type, and five other types in total. The basic model is generally used for transporting media at normal temperatures, while the high-temperature version can handle liquids at very high process temperatures. It is said online that shielded pumps can operate in environments of 300 degrees Celsius, and I believe this usually refers to the temperature of the medium being transported. Think about it: the coils of the motor are sealed inside a shield, so there’s no way such coils can withstand 300 degrees Celsius. One thing is certain: any pump used to transport high-temperature liquids must have a cooling system, and shielded pumps are no exception. The graphite bearings are equipped with coolers, and the high-temperature fluid passes through these coolers before being used to lubricate the graphite bearings. The motor stator is also equipped with a water jacket, which uses incoming and returning water to cool the motor stator. Looking forward to better posts!
Shielded pumps can operate at temperatures of up to 300 degrees without any problems. Currently, many heat transfer oil circulation pumps use shielded pumps; in the styrene project in Nanjing Yangba, the heat transfer oil circulation pumps were capable of operating at around 315 degrees, and Shielded pumps from Hydramatic were used for this purpose.
Are there any shielded pumps made by Dalian Huanyou Factory? How is it working? Please post a reply!
To determine the operating temperature for a pump, one needs to consider its material; at higher temperatures, it is possible to use a pump with a higher material grade. This applies to centrifugal pumps, and shielded pumps are also considered centrifugal pumps. For magnetic pumps as well, the material used is important. They are made of magnetic materials, and neodymium-iron-boron is the worst-performing magnetic material in terms of temperature resistance; it can withstand temperatures of 120–137 degrees. Samarium-cobalt can handle temperatures of 260–350 degrees, while aluminum-nickel-cobalt can withstand 305 degrees. Samarium-cobalt has twice the high-temperature resistance of neodymium-iron-boron, but its cost is also twice as high. Among these three materials, neodymium-iron-boron has the strongest magnetism, being 20% more powerful than samarium-cobalt. Tip: Only magnetic materials possess this property, namely a maximum operating temperature; above this temperature, they lose all of their magnetism irreversibly, and even after cooling down, they cannot regain their magnetic properties. This temperature is known as the Curie temperature.
This temperature is no problem; among the options available right now, Dalian Empire, Haimitek, and Shanghai Nikko are all quite good choices
The Kaimipu shielded pumps produced in Zhangjiagang offer excellent quality and service.