Lesson 1 - Pump Development and Application
Topics:
Development of pumps; Pumping systems; Water, chemical, waste, high-viscosity, and solids pumping systems
Learning Objectives:
– Describe dead-end and recirculating hot water distribution systems.– List several special considerations involved in chemical pumping systems.
– Define the term viscosity and give examples of high-viscosity materials.
– Tell the effects of heat on the pumping of high-viscosity materials.
– List some special problems involved in the pumping of solids.
Lesson 2 - Basic Pump Hydraulics
Topics:
Terminology; Calculating total head, horsepower, and available vs required NPSH; Pump performance; Head capacity; Efficiency; Horsepower curves; Pump selection
Learning Objectives:
– Describe suction head and suction lift pumping conditions.– Tell what three elements make up total dynamic head.
– Define static suction head.
– Contrast liquid, brake, and electrical horsepower.
– Tell what useful information can be gained from pump curves.
Lesson 3 - End-Suction Centrifugal Pumps
Topics:
Operation; Part definitions; Casing materials; End-suction casing configurations; Impeller types; Wearing rings; Shafts, bearings, and sleeves
Learning Objectives:
– Describe the function of the following: pump casing, shaft, impeller, wearing rings, and stuffing box.– Contrast frame-mounted and close-coupled end-suction pumps.
– Give characteristics of fluids pumped with open, semi-open, and closed impellers.
– Name an advantage and a disadvantage each for stainless steel and brass shaft sleeves.
Lesson 4 - Propeller and Turbine Pumps
Topics:
Line-shaft, can, and submersible turbines; Flow patterns; Axial- and mixed-flow propeller pumps; Turbine pump construction and applications
Learning Objectives:
– Explain the construction of a line-shaft turbine pump.– Name the two types of flow possible in a propeller pump.
– Tell the function of diffuser vanes in an axial-flow propeller pump.
– Define electrochemical corrosion and state its cause.
– Describe fluids that can be pumped by a regenerative turbine pump.
Lesson 5 - Rotary Pumps
Topics:
External-gear, internal-gear, lobe, screw, vane, rotary piston, and flexible-member pumps; Rotary pump installation
Learning Objectives:
– Describe the fluids that can be pumped by a rotary pump.– Explain the operation of external- and internal-gear pumps.
– Describe the parts and construction of a lobe pump.
– Compare and contrast timed and untimed screw pumps.
– Tell why sealed bearings might be used in a vane pump.
Lesson 6 - Reciprocating Pumps
Topics:
Reciprocating pump applications, parts, classification, and operation; Horizontal and vertical plunger pumps; Air-driven pump operation
Learning Objectives:
– Name the parts that make up the power end of a reciprocating pump and describe their operation.– Define the terms single-acting pump and double-acting pump.
– Compare simplex and duplex pumps.
– Explain how the pumped fluid lubricates a reciprocating pump.
– Calculate the discharge pressure of an air-driven pump when given the piston ration and motor air supply.
Lesson 7 - Metering Pumps
Topics:
Uses and classes of metering pumps; Plunger, piston, diaphragm, air-operated, and rotary metering pumps
Learning Objectives:
– Tell what kinds of pumps are used for metering applications.– Describe metering pump lubrication techniques.
– Name the parts of a diagram metering pump and state the function of each.
– Explain the operation of a diaphragm metering pump.
Lesson 8 - Special-Purpose Pumps
Topics:
Handling difficult materials; Chemical, magnetic-drive, canned-motor, slurry, pulp-handling, trash, sewage, diaphragm, and vortex pumps
Learning Objectives:
– Describe the operation of a flexible-tube pump.– Give an application for a progressing-cavity pump.
– Name one disadvantage of a seal-less magnetic-drive pump.
– Explain how to prepare a new centrifugal pump for operation.
– Tell which parts of a reciprocating slurry pump require the most maintenance.
Lesson 9 - Packings and Seals
Topics:
Sealing requirements; Stuffing boxes; Packing materials and recommendations; Installing packing; Mechanical, cartridge, balanced, and special seals
Learning Objectives:
– Tell why slight leakage through shaft seals is necessary.– Name the type of stuffing box required for pumps operating under suction lift conditions.
– Give a typical application each for cotton, Teflon", and aluminum packing.
– Describe the procedure involved in replacing pump packing.
– Describe a packingless seal.
Lesson 10 - Pump Maintenance
Topics:
Pump bearings, lubrication, and seals; Pump installation and maintenance; Centrifugal, turbine, rotary, and reciprocating pump maintenance
Learning Objectives:
– Name three types of antifriction bearings.– Name three factors to consider when preparing pump lubrication schedules.
– Describe a typical application for each of the following bearing seals: felt, leather, synthetic.
– Tell the two major maintenance problems encountered in rotary pumps.
– Explain how to identify worn piston rings in a reciprocating pump.
