Lesson 1Positive-displacement and specialty pumps: progressive cavity, diaphragm, peristaltic, magnetic-driveThis lesson covers positive-displacement and special pumps used when regular centrifugal pumps won't do. It explains progressive cavity, diaphragm, peristaltic, and magnetic-drive pumps, with focus on controlling flow, handling shear, and keeping fluids contained safely.
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, temperatureThis lesson shows how thickness of fluid, size and amount of solids, how rough it is, how it eats metal, and heat decide the pump type, speed limits, gaps, and seals. It stresses checking data sheets and lab tests to stop pumps from failing again and again.
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, multistageThis lesson introduces main centrifugal pump families and what they can handle. It compares end-suction, vertical inline, split-case, and multistage pumps for pressure, how well they work, space they take, and common factory 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 overlaysThis lesson looks at materials and coatings that fight wear from rough slurries. It compares rubber linings, high-chrome irons, hardfacing, and ceramic overlays, with tips on speed limits, particle shapes, 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 couplingsThis lesson describes common pump drivers and couplings like electric motors, VFDs, gearboxes, and flexible couplings. It links driver choice to speed, starting power, control needs, and strong work in factory conditions.
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 plasticsThis lesson explains picking materials for corrosion and fit. It compares cast iron, 304/316 stainless, duplex, Hastelloy, PTFE-lined, and special plastics, using fluid makeup, heat, and salt 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 typeThis lesson details NPSH ideas and cavitation dangers for different jobs. It teaches reading NPSHr curves, guessing NPSHa, and changing setup, heat, and speed to stop cavitation harm and power 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 plansThis lesson explains sealing plans based on fluid poison, fire risk, and leak allowance. It compares packing, single and double mechanical seals, glandless and magnetic-drive types, and API 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, vortexThis lesson focuses on slurry and solids pumps. It compares heavy-duty slurry pumps, recessed-impeller, and vortex pumps, showing wear fight, solids passage, work tradeoffs, and water removal uses.
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 conceptsThis lesson starts sizing using pump and system curves. It shows matching needed flow and head, counting friction and lift, and placing duty point for good work, strength, and room for change later.
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
