NPSH Graph with low efficiencies

[ICEngine23]

Is this a reasonable NPSH graph i.e. the efficiency values?

 

[DubMac]

A little cheesy, but it gets the point across.

 

[JJPellin]

The NPSHr is low and the efficiency is not very good. But, I don't see any thing particularly strange about the curves. Can you be more specific about your concerns?

Johnny Pellin

 

[Artisi]

Not sure of your question, NPSH and efficiencies are separate functions and independent of each other.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[TD2K]

The efficiency doesn't look odd for low flow centrifugals.

 

[Artisi]

Actually, I thought the efficiency was a bit optimistic for such a small pump.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)