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You asked why the casing is called an involute. The answer is because it is not called that, and only so called in error.

The casing shape is called a volute which means a spiral. There is no "in" in volute!

DrD

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On 12/19/2016 at 2:47 AM, Manjunatha k said:

word "involute" comes in Gear profile...

Actually, Manjunatha k has it exactly backward. The gear form comes from the geometric curve called an involute, not the other way around!

On 12/10/2016 at 8:18 AM, Saurabh Upadhyay said:

Because its casing is in from  of involute because constant velocity  required to maintain.

so casing is make in the form of involute.

 

Saurabh, you evidently did not read what I wrote earlier. The pump casing is a VOLUTE, not an INVOLUTE.

Please people, read what has already been said!!

DrD

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how can we design centrifugal pump based on given parameters?

Pressur-6-7 bar,flow rate-220-250 liter per min,crank rotation-9000-10,000rpm (pump diameter if required-200mm with 50mm bilateral tolerance) and also ther is some back pressure at entrance of fluid of density 1480 kg/m^3

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