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Does Suction Specific Speed Vary with Actual Operating Speed
Hi, I had been under the assumption that the calculation of Suction Specific Speed used the actual operating speed, not the maximum design speed. Last week, I noticed that the Goulds E-Prism program shows the same Nss regardless of speed. i.e... they show the same Nss for 3600 rpm, 1800 rpm...- feo1966
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- Replies: 12
- Forum: Pump engineering
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NPSH Margin Reliability Curve
Hi Several studies and authors have noted that peak impeller damage can happen around 1.5 to 2 X the NPSHR(3%) line. Mr Budris even managed to get that language into the 1998 version of ANSI 9.6.1. Peak erosion, peak noise, peak pulsations, all happen in this area. Once air starts coming...- feo1966
- Thread
- Replies: 2
- Forum: Pump engineering
