Glycol used for barrier fluid
Glycol used for barrier fluid
(OP)
Dear all,
anybody got experience on using glycol as barrier seal for a plan 53c to be used on cryogenic pumps (ethylene fractionator reflux pump)?
anybody got experience on using glycol as barrier seal for a plan 53c to be used on cryogenic pumps (ethylene fractionator reflux pump)?





RE: Glycol used for barrier fluid
RE: Glycol used for barrier fluid
RE: Glycol used for barrier fluid
RE: Glycol used for barrier fluid
RE: Glycol used for barrier fluid
Use only pure monoethylene glycol (MEG).
Ideally use demineralised water.
Do not use proprietry anti-freeze - it contains additives which plate out on the seal faces.
Do not use 100% glycol - it causes high heat generation by viscous sheer and actually has a higher freezing point (you can see a typical graph of freezing point versus concentration here). Use 50/50 glycol/water, which is good for around -40 degC or 60/40 glycol/water which is good for around -65 degC.
One of the biggest reliabilty issues surrounding glycol?water barrier fluid is mishandling - using dirty/open containers etc, resulting in contamination of the barrier fluid and mixing in the wrong proportions. Many users these days tend to buy it pre-mixed in sealed containers, which is the best way to do it.
RE: Glycol used for barrier fluid