Lesson 1Pump types (gear, vane, piston): characteristics, efficiencies, and selection criteria for 5–25 l/min and up to 160 barDis section compare gear, vane, and piston pumps fi small to medium flows. It cover efficiencies, noise, suction limits, and how fi select displacement and speed fi deliver 5–25 l/min at up to 160 bar wid acceptable life.
External vs internal gear pump featuresVane pump efficiency and noise behaviorAxial piston pumps and control optionsSizing displacement for flow and speedNPSH, suction limits, and inlet conditionsLesson 2Seals, fittings, and connectors: selection for mineral oil, pressure ratings, and leak minimizationDis section focus on seals, fittings, and connectors fi mineral oil systems. It explain seal materials, pressure ratings, thread standards, and assembly practices dat minimize leakage, weeping, and installation damage in service.
Seal materials for mineral oil compatibilityStatic vs dynamic sealing arrangementsThread types: BSPP, NPT, and metricO-ring groove design and surface finishTorque, assembly, and leak testingLesson 3Directional control and flow control valves: solenoid vs manual valves, proportional considerations, and spool choicesDis section explain directional and flow control valves, comparing manual, solenoid, and proportional options. Yuh will learn spool symbols, flow ratings, pressure drops, and how fi choose valve response and control strategy fi each circuit.
Manual vs solenoid operated valve choicesSpool symbols, center options, and leakageProportional valves and control electronicsFlow control valves: fixed vs adjustableValve sizing for flow, pressure, and dutyLesson 4Reservoir design: sizing rules, breathers, sight gauges, baffles, and settling time calculationDis section cover reservoir sizing, layout, and accessories. Yuh will learn volume rules, baffle design, settling time, and how fi specify breathers, sight gauges, and clean-out features fi support cooling, de-aeration, and maintenance.
Tank volume rules and return residence timeBaffle layout for de-aeration and coolingBreathers, filters, and moisture controlSight gauges, level switches, and alarmsDrain ports, clean-out covers, and slopesLesson 5Motor selection: matching electric motor power, starting torque, and service factor to pump loadDis section link hydraulic pump demand to electric motor selection. Yuh will learn how fi calculate required power, consider starting torque, service factor, duty class, and starting methods fi avoid nuisance trips and overheating.
Calculating hydraulic power and motor kWStarting torque vs pump breakaway torqueService factor and duty cycle selectionStar-delta and soft starter implicationsMotor enclosure, cooling, and environmentLesson 6Pressure control elements: relief valves, sequence valves, pressure reducing valves — selection and setpoint approachesDis section explain pressure control elements, including relief, sequence, and pressure reducing valves. It cover internal layouts, stability, sizing, and practical methods fi setting and verifying safe, repeatable pressure limits.
Direct vs pilot operated relief valvesSetting main relief valves safelySequence valves for staged operationsPressure reducing valves and circuitsPressure override, stability, and chatterLesson 7Filtration strategy: return-line vs pressure-line vs tank suction filters; micron ratings and contamination codes (ISO 4406)Dis section compare return-line, pressure-line, and suction filtration, explaining where each is used, how fi choose micron ratings, and how fi interpret ISO 4406 contamination codes fi meet cleanliness and warranty requirements.
Return-line vs pressure-line filter applicationsTank suction strainers and protection limitsMicron rating, beta ratio, and dirt holdingReading and applying ISO 4406 codesFilter sizing, pressure drop, and service lifeLesson 8Shut-off valves, non-return valves, and drain/check valves: types, materials, and placementDis section detail shut-off, non-return, and drain or check valves. It explain valve types, materials, leakage behavior, cracking pressure, and recommended placement fi ensure safe isolation, backflow prevention, and controlled draining.
Ball, gate, and needle shut-off valve usesCheck valve cracking pressure and sizingPilot-operated check valves for load holdingMaterial choices for corrosion and fluid typeDrain and bleed valves for safe maintenanceLesson 9Instrumentation: pressure gauges, temperature sensors, flow meters — selection and mounting pointsDis section cover selection and placement of pressure, temperature, and flow instruments. Yuh will learn accuracy classes, damping, protection, and best mounting points fi commissioning, troubleshooting, and long-term monitoring.
Pressure gauge types and accuracy classesGauge snubbers, isolators, and overpressure limitsTemperature sensor types and immersion rulesFlow meter technologies and selectionPermanent vs test-point instrumentation
