Centrifugal Pumps: Maintenance, Troubleshooting, Repair and Rebuilding
Mechanical
Course Number: CPM-303
Course Description:
Centrifugal pumps and pump theory including how to read a pump curve and select the proper pump for the job. ANSI end suction pumps are disassembled, checked, and reassembled to industrial standards. Attendees perform accurate measurement of bearing shaft fits, setting of the impeller, checking shaft straightness, packing installation as well as setting of a mechanical seal. Attendees should be able to rebuild centrifugal pumps to factory standards upon completion of the course.
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Each student will receive class books, work activity sheets, self-test progress evaluations, as well as questions from the instructor to make sure they understand the material presented. It is expected that an attendee will leave the class with the basic knowledge of the subject and possess new-found skills to better equip them when they return to their job. A certificate suitable for framing will be issued to each attendee who successfully completes the course.
Hands-on activities:
55% to 60% hands-on activities
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Free Materials included:
0-1” Vernier Micrometer ($54 value)
Audel Mini-Ref ($30 value)
6”Bearing ID Scale ($12 value)
ANSI Pump Chart ($5 value)
SKF Bearing Tables ($25 value)
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3-day course: $1395 per person
Course Syllabus
HISTORY OF PUMPS
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Early pumps
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John Appold and the curved vane pump
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Development of pump theory and engineering tables
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Investigation of Cameron’s Tables
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Components of a centrifugal pump—why all pumps are the same
HYDRAULICS & READING A PUMP CURVE
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Understanding density, specific gravity, pressure, flow, and head
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Calculation of head
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Calculation of head losses and developing a system curve
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Choosing a pump to do the job
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Concern for the BEP (best efficiency point) and cavitation—NPSHR and NPSHA
PRECISION MEASUREMENT
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Using a scale
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Using a vernier caliper
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Using a vernier micrometer
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Using telescope gages
BEARING LIFE & BEARING IDENTIFICATION
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Series numbers
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Calculating the ID from the number
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Identification of bearings
SHAFT MEASUREMENTS & HOUSING MEASUREMENTS
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Checking bearing seats
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Checking housing bores
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Checking shaft for straightness
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Shaft repairs
DISASSEMBLY, CHECKING, AND REBUILDING OF DIFFERENT ANSI PUMPS
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Reading a pump rebuilding manual and what to do if a manual is unavailable
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Pump disassembly with concern for troubleshooting
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Shop hydraulic press work
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Shaft measurement and sketching the shaft
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Component inspection
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Rebuilding, repacking, and reassembling the pump
PACKING & MECHANICAL SEALS
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Measurement and cutting a set of packing rings
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Lantern rings and proper placement
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Setting packing for planned leakage
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Mechanical seal theory and practice – Seal installation
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Troubleshooting seal problems
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Gasket cutting
PUMP COMPONENT REPAIRS
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Spray techniques for shafting
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Shaft sleeving
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Bore sleeving
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Weld repair and grinding
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Epoxy repairs
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Shaft straightening
TROUBLESHOOTING PUMP PROBLEMS
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Listening with a stethoscope
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Using a vibration meter
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Using a bearing analyzer
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Detecting misalignment
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Hydraulic troubleshooting
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Correction of NPSHR problems
Course Pictures
Students repairing a pump in class:
Students rebuilding a pump:
Students rebuilding an older clamped housing Durco pump:
Checking Pump Housing for Bearing Fit:
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Checking for Case Wear:
Pump Rebuilding of Various Models:
