Lesson 1Positive-displacement and specialty pumps: progressive cavity, diaphragm, peristaltic, magnetic-driveDeals with positive-displacement and specialty pumps used when centrifugal pumps won't do. Explains progressive cavity, diaphragm, peristaltic, and magnetic-drive pumps, with focus on flow control, shear, and containment.
When to choose positive-displacement pumpsProgressive cavity pumps for viscous slurriesDiaphragm pumps for chemicals and sludgesPeristaltic pumps for dosing and slurriesMagnetic-drive and canned-motor pump usesLesson 2Selection criteria by fluid properties: viscosity, solids content/size, abrasiveness, corrosivity, temperatureExplains how viscosity, solids size and content, abrasiveness, corrosivity, and temperature determine pump type, speed limits, clearances, and sealing. Stresses checking data sheets and lab results to prevent repeated failures.
Viscosity impact on pump type and efficiencyHandling dissolved, fibrous, and granular solidsAssessing abrasiveness and erosion mechanismsCorrosivity, pH, and chemical compatibilityTemperature limits, vapor pressure, and coolingLesson 3Overview of centrifugal pump families: end-suction, vertical inline, split-case, multistageIntroduces main centrifugal pump families and their hydraulic ranges. Compares end-suction, vertical inline, split-case, and multistage designs for pressure range, efficiency, space needs, and typical industrial uses.
End-suction overhung pumps and standardsVertical inline pumps for space-constrained plantsAxially split-case pumps for high flowsMultistage pumps for high-pressure servicesHydraulic envelopes and selection guidelinesLesson 4Wear-resistant materials and coatings for abrasive slurries: rubber linings, hardfacing, ceramic overlaysReviews wear-resistant materials and coatings for abrasive slurries. Compares rubber linings, high-chrome irons, hardfacing, and ceramic overlays, with advice on velocity limits, particle shape, and upkeep.
Rubber-lined casings and impellersHigh-chrome white iron and alloysHardfacing of wear rings and volutesCeramic tiles, sleeves, and overlaysVelocity control to limit erosion ratesLesson 5Typical pump driver and coupling choices: electric motors, VFDs, direct-coupled, gearboxes, flexible couplingsDescribes common pump drivers and couplings, like electric motors, VFDs, gearboxes, and flexible couplings. Connects driver choice to speed, starting torque, control needs, and mechanical reliability in industrial service.
Electric motor selection and enclosure typesUsing VFDs for control and energy savingsGearboxes and belt drives for speed matchingDirect versus flexible coupling arrangementsAlignment, vibration, and torsional issuesLesson 6Material selection and corrosion compatibility: cast iron, 304/316 stainless, duplex, Hastelloy, PTFE-lined and engineered plasticsExplains material selection for corrosion and compatibility. Compares cast iron, 304/316 stainless, duplex, Hastelloy, PTFE-lined, and engineered plastics, based on fluid composition, temperature, and chloride levels.
Using corrosion charts and lab dataCast iron limits and common failures304 versus 316 stainless in chloridesDuplex and nickel alloys for severe dutyPTFE-lined and plastic pumps for chemicalsLesson 7NPSH considerations and cavitation avoidance for each service typeDetails NPSH concepts and cavitation risks for various services. Teaches reading NPSHr curves, estimating NPSHa, and adjusting layout, temperature, and speed to avoid cavitation damage and performance drop.
NPSH definitions, NPSHr versus NPSHaReading NPSH curves on pump datasheetsEstimating NPSHa from system geometryCavitation symptoms and damage patternsDesign changes to improve NPSH marginLesson 8Sealing options by fluid risk: mechanical seals, packing, glandless and magnetic drive seals, seal flush plansExplains sealing strategies based on fluid toxicity, flammability, and leakage tolerance. Compares packing, single and double mechanical seals, glandless and magnetic-drive designs, and API-style seal flush plans.
When packing is acceptable or unsuitableSingle versus double mechanical sealsSeal face materials and elastomer choicesGlandless and magnetic-drive containmentSeal flush plans and support systems basicsLesson 9Slurry and solids-handling pump types: heavy-duty slurry pumps, recessed-impeller, vortexFocuses on slurry and solids-handling pump designs. Compares heavy-duty slurry pumps, recessed-impeller, and vortex pumps, highlighting wear resistance, solids passage, efficiency tradeoffs, and dewatering applications.
Slurry classification and particle size effectsHeavy-duty slurry pump hydraulics and linersRecessed-impeller and vortex pump featuresSolids-handling limits and derating rulesTypical mining and wastewater applicationsLesson 10Sizing basics: matching flow and head to pump curves and system curve conceptsIntroduces sizing basics using pump and system curves. Shows matching required flow and head, accounting for friction and static lift, and positioning the duty point for efficiency, reliability, and future flexibility.
Defining required flow, head, and duty rangeBuilding system curves from piping lossesLocating the duty point on pump curvesEvaluating efficiency and power at dutyAllowing for future capacity and fouling
