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This is a new impeller. These are either direct drive, or belt driven...belt most of the time which is why 1000 rpm is not an issue sheaves can give you any speed you want. The rpm is not the issue, you can pick any rpm you want and design the pump based of that. The only difference will be...

1000 rpm is a given based on our performance chart and where we want the pump to operate.

So the problem I am having is when you design an impeller you use specific speed term. From this you get different coefficients that have been determined through experimental data that give the dimensions for D2 impeller diameter and b2 impeller exit width. So now let’s say I have a set of...