I’m currently working on a cryopump, and I would appreciate your advice regarding the material selection for the shaft
Thread Content
The medium is a calcium chloride solution at a temperature of -25°C. Regarding the material for the shaft, we initially decided on 3Cr13 – is this material available?
Data on shaft material selection under different operating conditions: lol
Those in need of calcium chloride can contact me at 18067279835. I mainly supply anhydrous and dihydrate calcium chloride produced by Juhua
At -25 degrees Celsius, there’s no problem at all. I’ve worked on low-temperature pumps used in liquefied natural gas processing before – temperatures as low as nearly minus 200 degrees Celsius. That’s when things really get tricky; every piece of material has to go through impact tests, and various types of radiographic inspections are carried out to ensure no problems arise. The ultrasonic testing for the two pump casings cost 100,000 in total, yet the testing reports still showed that they were not up to standard. It was absolutely terrible.