Page 179 - Improving Machinery Reliability

150 Improving Machinery Reliability

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60CO COO0 10000 12000 14000 16000
Suction specific speed-N,,, at best efficiency
flow single suction or one side of double suction

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2500-1 OOOONs
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50 - I I I I I
7000 8000 9000 10000 11000 12000
Suction specific speed-N,,, at best efficiency
flow single suction or one side of double suction
Figure 3-42. Suction recirculation versus suction specific speed Nsss4