what is inertia capacity of pump ?

[sunloco]

as captioned

 

[BigInch]

I think you mean the "Rotational mass moment of Inertia" = the sum of the disk's (impeller) and the water's (or other product), contained in the volute around the disk, individual rotational mass moments. Rotational mass moment of inertia describes a mass' resistance to changes in rotational speed. In the case of a pump, the acceleration when starting the pump from 0 rpm to operating rpm, or once rotating, the resistance of the pump to a change in rpm, or the deceleration of the pump's rpm when stopping. In each case a specific amount of Torque must be applied to that mass for a certain length of time to effect a given change in rpm.

BigInch-born in the trenches.

http://virtualpipeline.spaces.msn.com

 

[sunloco]

so, if customer request that manufacture provide inertia capacity, basically what does it means ?

 

[stanier]

http://scienceworld.wolfram.com/physics/MomentofInertia.html

Go to this site and follow the links. Study as much or as little as you care to.



Geoffrey D Stone FIMechE C.Eng;FIEAust CP Eng

http://www.waterhammer.bigblog.com.au

 

[BigInch]

The customer wants the pump manufacturer to provide the rotational moment of inertia data for the pump. I would also want that data for the coupling and motor too.

The customer probably wants to have that data to do a hydraulic analysis for start-up and shut-down conditions.

BigInch-born in the trenches.

http://virtualpipeline.spaces.msn.com