Plastic pump vs plastic liner pump
Plastic pump vs plastic liner pump
(OP)
Dear all,
WE have to pump H2SO4 95%, and we need the non metal pump to do so. There are two brand, submit their offer. The teflon lining pump and full non metal pump.
The price is also different.
Do you have any experience which one is better. Or in other word, which application is better than the other.
Thanks,
MW
WE have to pump H2SO4 95%, and we need the non metal pump to do so. There are two brand, submit their offer. The teflon lining pump and full non metal pump.
The price is also different.
Do you have any experience which one is better. Or in other word, which application is better than the other.
Thanks,
MW





RE: Plastic pump vs plastic liner pump
Have you considered a large peristaltic pump? I've seen these large units clamped to a plastic lined braded SS hose. No wetted parts. Steady flow. Easily replaced. They are flow limiting, though.
ChemE, M.E. EIT
"The only constant in life is change." -Bruce Lee
RE: Plastic pump vs plastic liner pump
I doubt too many people would repair a Tefzel liner in smaller (ANSI or less) pumps. Just buy a new part.
As far as H2SO4, it isn't that bad to pump. You should get decent life out of either style pump. Both have similar temp ratings I'm sure. If solids are present, I would lean towards the full plastic pump. Nothing like eroding your protective liner (but even CS is compatible with H2SO4 at certain temps and conc). If it's clean and clear, then I would look at seal versus mag-drive, initial price, operating costs and maintenance costs.
RE: Plastic pump vs plastic liner pump
We need sealless pump, indeed. Are there magdrive teflon liner pump?
Thx,
Muwardi
RE: Plastic pump vs plastic liner pump
Not sure of your locale, but here is a sampling of Tefzel/PTFE lined pumps:
Goulds (www.gouldspumps.com) 3298, 3299, SP 3298, V3298, Richter Chemie (www.itt.com)model number?,
Flowserve (www.flowserve.com) PolyChem 'L' is FRP lined with PFA, PolyChem 'M'
ANSIMAG (www.ansimag.com) all lined magdrives
INNOMAG (www.innomag.com) all lined magdrives
Fybroc (www.fybroc.com)has all FRP pumps, but may be working on or have a lined FRP pump.
Hope that helps.
RE: Plastic pump vs plastic liner pump
In any case, be certain to provide all possible specific application information to the manufacturers of the pumps under consideration. They will have access to unpublished information about the pump design and performance history in similar services. Pay close attention to the manufacturers recommendations and cautions.
One thing that you can count on is that if your selection is based primarily on the initial cost of the pump, the probability of satifactory service and favorable true life-cycle costs will be greatly diminished.
RE: Plastic pump vs plastic liner pump
If it is very clean, and will remain so, this would not be a problem, and mag drives are OK.
Either style of pump has excellent records in sulfuric acid service.
rmw