NPSH = Net positive suction head

The margin of the absolute value of the static head above the head ...

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NPSHA = Net positive suction head available

The minimum (NPSH) available at the inlet area of the pump as ...

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NPSHR = Net positive suction head required

The minimum (NPSH) at the pump inlet connection required to give ...

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Operating conditions

All parameters (for example operating temperature or pressure) ...

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Operating point

The point at which a pump will operate in an installation. It will ...

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Optimum head

The total head developed by the pump at a rate of flow corresponding ...

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