-What pump should be used for a cryogenic medium at 5-0 degrees containing 25% ethylene glycol and 75% water?

2015-09-25View Original

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-What pump should be used for a cryogenic medium at 5-0 degrees containing 25% ethylene glycol and 75% water?

Reply #22015-09-25

Can an ordinary pump be used for such antifreeze?……

Reply #32015-09-26

Can ethylene glycol cause oxalic acid to corrode pumps?

Reply #42015-10-10

Ethanedioic acid will be produced; after some time, the pH value can be measured to confirm that the solution is acidic. We previously used ethylene glycol, thinking it was non-corrosive, but after one year corrosion occurred and the solution turned acidic. We then switched to the anti-corrosive ethylene glycol from Chaoyang Sunlight Chemicals, and after 5 years no signs of corrosion have been observed.

Reply #52015-10-11

What is the pH value? . . . . . ?

Reply #62015-10-12

The temperature isn’t very low. Carbon steel pumps can be used, but stainless steel pumps are better as they are resistant to freezing and corrosion.

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