Lesson 1Positive-displacement and specialty pumps: progressive cavity, diaphragm, peristaltic, magnetic-driveDis one cover positive-displacement and specialty pumps wey we use when centrifugal ones no fit. E go explain progressive cavity, diaphragm, peristaltic, and magnetic-drive pumps, focusing 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, temperatureE go explain how viscosity, solids size and loading, abrasiveness, corrosivity, and temperature dey control pump type, speed limits, clearances, and sealing. E go stress screening data sheets and lab results to avoid chronic 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, multistageDis go introduce main centrifugal pump families and dem hydraulic envelopes. E go compare end-suction, vertical inline, split-case, and multistage designs for pressure range, efficiency, footprint, and typical industrial services.
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 overlaysDis go review wear-resistant materials and coatings for abrasive slurries. E go compare rubber linings, high-chrome irons, hardfacing, and ceramic overlays, with guidance on velocity limits, particle shape, and maintenance.
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 couplingsDis go describe common pump drivers and couplings, including electric motors, VFDs, gearboxes, and flexible couplings. E go link driver choice to speed, starting torque, control needs, and mechanical reliability in industrial duty.
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 plasticsDis go explain material selection for corrosion and compatibility. E go compare cast iron, 304/316 stainless, duplex, Hastelloy, PTFE-lined, and engineered plastics, using fluid composition, temperature, and chloride level.
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 typeDis go detail NPSH concepts and cavitation risks for different services. E go teach how to read NPSHr curves, estimate NPSHa, and adjust layout, temperature, and speed to avoid cavitation damage and performance loss.
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 plansDis go explain sealing strategies based on fluid toxicity, flammability, and leakage tolerance. E go compare 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, vortexDis go focus on slurry and solids-handling pump designs. E go compare heavy-duty slurry pumps, recessed-impeller, and vortex pumps, highlighting wear resistance, solids passage, efficiency tradeoffs, and dewatering 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 conceptsDis go introduce sizing basics using pump and system curves. E go show how to match required flow and head, account for friction and static lift, and position 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
