Mechanical Seal Barrier Fluid???
Mechanical Seal Barrier Fluid???
(OP)
We are designing equipment using FLowserve mechanical seals. We originally intended to use Royal Purple GT78 (www.royalpurple.com/prodsi/bfgt.html) as the barrier fluid (1.0 gpm flush @ 300F inlet temp).
Now, the end-user has asked us to address switching from GT78 to Methyl Oleate or Gylcerol. Flowserve has been very general in their response on what they are willing to "sign-off" on...and as we all know, generalities do not fly with refineries and engineers!
Can someone comment on these barrier fluid choices and perhaps offer some wisdom??
Methyl Oleate -> Flash Point=350F, Boiling Point=650F, 0.6cP @300F
Glycerol -> Flash Point=320F, Boiling Point=550F, 4.0cP @300F
Royal Purple GT78 -> Flash Point=482F, Boiling Point=760F, 4.4cP @300F
John
Now, the end-user has asked us to address switching from GT78 to Methyl Oleate or Gylcerol. Flowserve has been very general in their response on what they are willing to "sign-off" on...and as we all know, generalities do not fly with refineries and engineers!
Can someone comment on these barrier fluid choices and perhaps offer some wisdom??
Methyl Oleate -> Flash Point=350F, Boiling Point=650F, 0.6cP @300F
Glycerol -> Flash Point=320F, Boiling Point=550F, 4.0cP @300F
Royal Purple GT78 -> Flash Point=482F, Boiling Point=760F, 4.4cP @300F
John





RE: Mechanical Seal Barrier Fluid???
RE: Mechanical Seal Barrier Fluid???
Any insight on "flush" oils?
John
RE: Mechanical Seal Barrier Fluid???
They want to inject a fatty acid into thier process? I'm not sure why the pump/seal company would object. This is a call that the customer has to make. As long as the hardware and soft goods are compatable with the fluid they should be fine with it. (It appears that Fluoroelastomers should be acceptable, but don't take my word, check the Parker book or another O-ring compatability chart)
Pray tell, what is the process fluid?
Check out the following link for more on Methyl Oleate:
http://www.ars.usda.gov/research/publications/publications.htm?SEQ_NO_115=136634&pf=1
RE: Mechanical Seal Barrier Fluid???
I would like to know what is the product you are sealing, and the API Plan been used, I guess It could be API Plan 52 or 53 in which the product won´t go to the atm.
RE: Mechanical Seal Barrier Fluid???