Issues related to pump temperature selection
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I would like to ask the experts: For ordinary chemical process centrifugal pumps, at what temperature does the bearing housing require external cooling water? Can an internal metal bellows seal be used when the temperature reaches 200 degrees?
Generally above 250°C; 200°C can use an internal bellows
Whether a bearing requires cooling water depends on the pump manufacturer; some domestic manufacturers may need to use cooling water at temperatures over 100 degrees, while Sulzer can handle temperatures over 200 degrees with air cooling alone.
It also depends on the region; in areas with high ambient temperatures, cooling water is used when the temperature of the medium reaches around 100 degrees. In areas where water is scarce, air cooling is generally employed； In fact, ordinary motors generate quite a lot of wind, so air cooling seems to serve little purpose