Application of magnetic float level gauges in high-temperature operating conditions.
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The original condensate tank used 1400mm glass panels; however, leaks have started to occur frequently during its current use. The condensate tank is a fatigue-resistant vessel operating under pressures ranging from 0.6 to 2.6 MPa and at temperatures of 270 degrees Celsius. Magnetic float level gauges lose their magnetic properties when exposed to temperatures above 300°C. Is it appropriate to use such magnetic float level gauges under these operating conditions? Will this affect their service life? Are there any other requirements?
At 300°C, a strong magnet made of samarium-cobalt is required, and there’s no problem with that. Perhaps the manufacturer didn’t understand the operating temperature requirements and used magnets that are not heat-resistant.
This post was last edited by stone_HOTO on 2019-11-18 at 13:44. Ordinary floating balls are suitable for media with temperatures ranging from 0°C to 200°C; when the operating temperature exceeds 200°C to 400°C, a cooling device can be provided. If a cooling device cannot be used, a high-temperature type can be chosen, such as one made of 1Cr18Ni9Ti; it is also possible to consult manufacturers such as Shanghai Puli Ke, Shangzi Yi, Chuan Yi, and Zhonghuan for advice
Mm-hmm, okay. I’ve consulted with design firms and manufacturers, and they said that magnetic floats can be used, but I’m not sure about the actual performance, which is why I want to ask about their real-world application.
The buoy used for long-distance transmission can’t be used on-site anymore, right?
Mm, the length of the pressure guide tube can be extended for external connection
On-site display? Then go with the magnetic flap
Is there still 300 degrees left after the magnetic flap is removed? It will be fine once the temperature drops
The magnetic float uses samarium-cobalt magnets, while the panel is made of ceramic flip columns; by providing the manufacturer with details about the specific operating conditions, it is easy to select the appropriate model
A household pressure guide tube will work as well; as long as the temperature drops, a regular float can also be used for a long time