Handbook of Civil Engineering Calculations

xxii Contents

Similarity or Affinity Laws for Centrifugal Pumps .......... 6.36

Similarity or Affinity Laws in Centrifugal Pump

Selection ............................................................ 6.37

Specific Speed Considerations in Centrifugal Pump

Selection ............................................................ 6.38

Selecting the Best Operating Speed for a

Centrifugal Pump ............................................... 6.40

Total Head on a Pump Handling Vapor-Free

Liquid ................................................................. 6.42

Pump Selection for any Pumping System .................... 6.47

Analysis of Pump and System Characteristic

Curves ............................................................... 6.55

Net Positive Suction Head for Hot-Liquid Pumps ......... 6.61

Part 3. Centrifugal Pumps and Hydro Power ..................... 6.63

Minimum Safe Flow for a Centrifugal Pump ................. 6.63

Selecting a Centrifugal Pump to Handle a Viscous

Liquid ................................................................. 6.64

Pump Shaft Deflection and Critical Speed .................... 6.66

Effect of Liquid Viscosity on Regenerative-Pump

Performance ...................................................... 6.67

Effect of Liquid Viscosity on Redciprocating-Pump

Performance ...................................................... 6.69

Effect of Viscosity and Dissolved Gas on Rotary

Pumps ................................................................ 6.70

Selection of Materials for Pump Parts .......................... 6.72

Sizing a Hydropneumatic Storage Tank ....................... 6.72

Using Centrifugal Pumps as Hydraulic Turbines .......... 6.73

Sizing Centrifugal-Pump Impellers for Safety

Service ............................................................... 6.78

Pump Choice to Reduce Energy Consumption and

Loss ................................................................... 6.81