Page 10 - Centrifugal Pumps Design and Application

Stage Pumps. Single-Suction Single-Stage Overhung Pumps. Multi-Stage Pumps
Notation. References.

17 Mechanical Seals 354
by James P. Netzel
Theory of Operation. Design Fundamentals. Seal Leakage. Seal Wear. Classification
of Seals by Arrangement. Classification of Seals by Design. Materials of Construc-
tion, Mating Ring Designs. Adaptive Hardware. Upstream Pumping. Mechanicai
Seals for Chemical Service. Mechanical Seals for Refinery Service. Typical Applica-
tions. Light Hydrocarbon Service. Mechanical Seal Installation and Troubleshooting
References.

48 Vibration and Noise in Pumps .............................. 422

by Fred R. Szenasi
Introduction. Sources of Pump Noise. Mechanical Noise Sources. Liquid Noise
Sources. Causes of Vibrations. Installation/Maintenance Effects. Application. Hy-
draulic Effects. Half-Wave Resonance (Open-Open and Closed-Closed). Quarter-Wave
Resonance (Open-Closed). Design/Manufacturing. Rotordynamic Analysis. Lateral
Critical Speed Analysis. Seal Effects. Response to Unbalance. Acceptable Unbalance
Levels. Allowable Vibration Criteria. Rotor Stability Analyses. Torsional Critical Speed
Analysis. Variable Speed Drives. Diagnosis of Pump Vibration Problems. Measure
ment Techniques. Impact Tests. Troubleshooting, Impact Tests. Appendix. Acoustic
Velocity of Liquids. References.

Part4: Extending Pump Life 495

19 Alignment 497
by Malcolm G. Murray, Jr.
Definitions. Why Bother With Precise Alignment? Causes of Misalignment. Manage-
ment and Human Factors. Physical Factors. Pre-Alignment Steps. Methods of Pri-
mary Alignment Measurement. Methods of Calculating Alignment Movements. Jig
Posts. Numerical Examples. Thermal Growth. References.

20 Rolling Element Bearings and Lubrication 524
by Heinz P. Bloch
Friction Torque. Function of the Lubricant. Oil Versus Grease. Advantages. Disadvan-
tages. Oil Characteristics. Viscosity. Viscosity Index. Pour Point. Flash and Fire Point.

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