Centrifugal Pump Selection and Sizing - Calgary Pump Symposium ...

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Minimum Flow • Minimum flow issues: - temperature rise - internal recirculation - increased flow separation - increased pressure fluctuation - increased vibration levels (both radial and axial) • Avoiding these issues - method from WH Fraser (ref: “Flow Recirculation in Centrifugal Pumps”, 1981 Texas A&M Turbomachinery Symposium), ensure pump selection has acceptable range (ie. operation at flows above onset of recirculation) 28
Minimum Flow - Guidelines Recirculation (% of Q- BEP) 100.0 90.0 80.0 70.0 60.0 50.0 WH Fraser, "Flow Recirculation in Centrifugal Pumps" Ns 500-2500 6000 8000 10000 12000 14000 16000 18000 Nss (US customary units, at BEP) Multi-stage Double-Suction Single-Suction • for Q
Page 1 and 2: Centrifugal Pump Selection and Sizi
Page 3 and 4: Pump types - Vertical In-line Pump
Page 5 and 6: Pump types - Between-Bearing Pump (
Page 7 and 8: Pump Selection - Old School 7
Page 9 and 10: The Goal • We want to select and
Page 11 and 12: Pump Selection - order of preferenc
Page 13 and 14: Relative Costs - example 1 • 200
Page 15 and 16: Relative Costs - example 3 • 200
Page 17 and 18: Overhung Pumps - Typical Coverage P
Page 19 and 20: VIL Pumps - Typical Limits • Tip
Page 21 and 22: VIL Pumps: Rigidly-coupled (OH4) ty
Page 23: Specific Speed (Ns) - a ‘dimensio
Page 26 and 27: Suction Specific Speed (Nss) - a
Page 30 and 31: Limited Range at Higher Nss Suction
Page 32 and 33: Head ( ft) 500 450 400 350 300 250
Page 34 and 35: Equations & Correlations • Head,
Page 36 and 37: Required Information • Require th
Page 38 and 39: Typical Casing Sizes Pump Speed Q (
Page 41 and 42: Worked Example: H= 500 ft, Q= 4500
Page 43: Overhung Pumps - Typical Coverage P
Page 46: Worked Example: H= 380 ft, Q= 1750
Page 49 and 50: Buying Pumps - Marrying the Hydraul
Page 51 and 52: Pump Standards - Applicability VIL
Page 53 and 54: General Info - ANSI/ASME B73 pumps
Page 55 and 56: What type of plant? • Class of Pl

Centrifugal Pump Selection and Sizing - Calgary Pump Symposium ...

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