INDICE: 1 Principles of Process Pumps. 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. 2 Pump Types and Selection. Why insist on better pumps. ANSI and ISO vs. API pumps. What we have learned. 3 Foundations and Base Plates. Securing pumps in placewith one exception. Why not to install pump sets in the as-shipped condition. Conventional vs. pre-filled base plate installations. Epoxy pre-filledbase plates. How to proceed if there is no access to specialist firms. What we have learned. 4 Piping and Gaskets. 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 vs. eccentric reducers. Vibration problems in piping. What we have learned. 5 Rolling Element Bearings. Bearing selection overview and windage as a design problem. Radial vs. 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. 6 Lubricant Application and Cooling Considerations. 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. 7 Lubricant Typesand Key Properties. Lubricant viscosities. When and why high film-strength synthetic lubricants are used. Lubricants for oil mist systems. What we have learned. 8 Bearing Housing Protection and Cost-Justification. Non-contacting 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 wehave learned. 9 Mechanical Sealing Options for Long Life. 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 to apply to many services. What we have learned. 10 Pump Operation. Starting centrifugal pumps. Surveillance of pump operation. Centrifugal pump shutdown. What we have learned. 11 Impeller Modifications and Pump Maintenance. Maintenance essentia
- ISBN: 978-1-1180-4123-9
- Editorial: John Wiley & Sons
- Encuadernacion: Cartoné
- Páginas: 224
- Fecha Publicación: 01/04/2011
- Nº Volúmenes: 1
- Idioma: Inglés