Principles of Centrifugal Process Pumps | p. 1 |
Pump performance: Head and flow | |
Operation at zero flow | |
Impellers and rotors | |
The meaning of specific speed | |
Process pump types | |
Process pump mechanical response to flow changes | |
Recirculation and cavitation | |
The importance of suction specific speed | |
What we have learned | |
References | |
Pump Selection and Industry Standards | p. 15 |
Why insist on better pumps | |
ANSI and ISO versus API pumps | |
What we have learned | |
References | |
Foundations and Base Plates | p. 23 |
Securing pumps in place-with one exception | |
Why not to install pump sets in the as-shipped condition | |
Conventional versus pre-filled base plate installations | |
Epoxy prefilled base plates | |
How to proceed if there is no access to specialist firms | |
What we have learned: Checklist of foundation and base plate topics | |
References | |
Piping, Stationary Seals, and Gasketing | p. 35 |
Pipe installation and support | |
Sliding supports and installation sequence deserve special attention | |
Monitoring pipe stress while bolting up | |
Flange leakage | |
What to do prior to gasket insertion | |
Spiral wound and kammprofile gaskets | |
Pipe, hydraulic tubing, or flexible connections? | |
Gusseting | |
Concentric versus eccentric reducers | |
Vibration problems in piping | |
What we have learned on piping and gasketing topics References | |
Rolling Element Bearings | p. 49 |
Bearing selection overview and windage as a design problem | |
Radial versus axial (thrust) bearings | |
Oil levels, multiple bearings, and different bearing orientations | |
Upgrading and retrofit opportunities | |
Bearing cages | |
Bearing preload and clearance effects | |
Bearing dimensions and mounting tolerances | |
What we have learned | |
References | |
Lubricant Application and Cooling Considerations | p. 69 |
Lubricant level and oil application | |
Issues with oil rings | |
Pressure and temperature balance in bearing housings | |
Cooling not needed on pumps with rolling element bearings | |
Oil delivery by constant level lubricators | |
Black oil | |
Lube application as oil mist (oil fog) | |
Desiccant breathers and expansion chambers | |
What we have learned | |
References | |
Lubricant Types and Key Properties | p. 83 |
Lubricant viscosities | |
When and why high film strength synthetic lubricants are used | |
Lubricants for oil mist systems | |
What we have learned | |
References | |
Bearing Housing Protection and Cost Justification | p. 91 |
Noncontacting bearing protector seals | |
Contacting bearing protector seals | |
How venting and housing pressurization affect bearing protector seal performance | |
Cost justification overview | |
Advanced bearing housing (bearing protector) seal summary | |
What we have learned | |
References | |
Mechanical Sealing Options for Long Life | p. 99 |
Still using packing? | |
General overview of mechanical seals | |
All flush plans have advantages and disadvantages | |
Always obtain the full picture | |
Seal chamber pumping ring (circulating device) technologies | |
Lessons apply to many services | |
What we have learned | |
Bibliography | |
Pump Operation | p. 115 |
Starting centrifugal pumps | |
Surveillance of pump operation | |
Centrifugal pump shutdown | |
What we have learned | |
Impeller Modifications and Pump Maintenance | p. 121 |
Maintenance essentials | |
Superior maintenance requires upgrading | |
Impeller upgrading with inducers | |
Distance from impeller tip to stationary internal casing components | |
Impeller trimming | |
Impeller wear rings | |
Vane tip overfiling and underfiling | |
What we have learned | |
References | |
Lubrication Management | p. 131 |
How bad is water contamination? | |
Avoid solids contamination | |
Avoid questionable storage and transfer practices | |
Periodic audits | |
What we have learned | |
References | |
Pump Condition Monitoring: Pump Vibration, Rotor Balance, and Effect on Bearing Life | p. 139 |
Vibration and its effect on bearing life | |
Monitoring methods differ | |
Vibration acceptance limits | |
Causes of excessive vibration | |
Rotor balancing | |
What we have learned | |
References | |
Drivers, Couplings, and Alignment | p. 153 |
Driver selection | |
Coupling selection and installation | |
Installation and removal | |
Alignment and quality criteria | |
Consequences of misalignment | |
Thermal rise and predefinition of growth | |
What we have learned | |
References | |
Fits, Dimensions, and Related Misunderstandings | p. 163 |
Low incremental cost of better pumps | |
Pump pedestals and bearing housings should not be water-cooled | |
Summary of bearing-related issues | |
Constant level lubricators | |
Bearing housing protector seals ("bearing isolators") | |
Motor lubrication summary | |
Mechanical seal issues | |
Hydraulic issues | |
Impeller hydraulics | |
Mechanical improvement or upgrade options | |
Process pump repair dimensions | |
What we have learned | |
References | |
Failure Statistics and Structured Failure Analysis | p. 183 |
Mean rime between failures (MTBF) and repair cost calculations | |
Performing your own projected MTBF calculations | |
Older pumps versus newer pumps | |
Reliability reviews start before purchase | |
Structured failure analysis strategies solve problems | |
The "FRETT" approach to eradicating repeat failures of pumps | |
What we have learned | |
References | |
Index | p. 199 |
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