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Author: Randal Ferman
NPSH margins

NPSH Margin — How Much?

Author: Randal Ferman A word on the terminology: Net Positive Suction Head (NPSH) is the sum of the total static plus…

Reliability_POR_and_AOR

The Scope of Pump Reliability

Thirty (30) some years ago I skimmed through an exhaustive study of the possible modes a prototype nuclear pump could…

Impellers – why underfile?

Author: Randal Ferman Underfiling is the removal of material from the underside (also back side, “non-working” side, or suction side) of…

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