maximum peripherical speed in centrifugal pumps
maximum peripherical speed in centrifugal pumps
(OP)
where can I find a table with the maximum linear speed of the fluid handled, depending on the material of the pump case?
thank you so much, any contribution will be appreciated,
Marc
thank you so much, any contribution will be appreciated,
Marc





RE: maximum peripherical speed in centrifugal pumps
I am not sure if I understand your question but sundyne makes centrifugal pumps that run at high RPM (22,000 + rpm) They might be able to answer your question.
Regards checman
http://www.sundyne.com
RE: maximum peripherical speed in centrifugal pumps
RE: maximum peripherical speed in centrifugal pumps
there are many factors to limit the speed. The more applied are based on cavitation resistance (for the impeller) and on abrasive resistance (for both impeller and casing). I found some casings of centrifugal pumps that handle fluids with SH2 dissolved in it, that really affect the casing, and the limitation for this pumps is the linear velocity of the fluid.
In the case of impellers, which I think should be very close for the casings, someone gave me this guide, maybe you find it useful:
Standard materials (125-150 Brinell), 80 ft/sec
Medium hardness (225-250 Brinell, such as 12 CR, 316ss work-hardened), 100
ft/sec
250-300 Brinell (17-4, Cd4MCu, Nitronic 60), 120 ft/sec
Special (Mn-steel, stellite 6 coat, hastelloy), 150 ft/sec
Hope it works,
thank you so much!
Marc
RE: maximum peripherical speed in centrifugal pumps
Other sources indicate that cavitation erosion intensity is proportional to impeller inlet tip velocity, U1, raised to a power exponent between 5 and 7. A threshhold U1 of about 65 fps (20 m/sec) for cavitation to begin has been cited in the literature.