HI 9.6.1-2012
- Rotodynamic Pumps Guideline For NPSH Margin
- standard by Hydraulic Institute, 2012
- Publisher: HI
$43.00$85.00
The document serves as a tutorial on the subject of NPSH as well as providing guidance for determining NPSH Margin. The following considerations are discussed relative to the sensitivity of a pump to NPSH-related problems:
- Impeller inlet tip speed
- Larger vs. smaller impeller eye diameter
- Suction specific speed
- Characteristics of the pumpage
- Operating range of the pump and proximity to POR and AOR
- Materials of construction and cavitation resistance
- Impeller vane overlap
- Pump size and relationship of size to cavitation damage
- Duty cycle - time of operation under cavitating condition
- Reduction of NPSHA with time
This excellent NPSH reference helps pump users understand why it is essential to specify an appropriate NSPH Margin and learn about the negative aspects of specifying an excessive NPSH Margin.
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