Red Seal Millwright case studies
Red Seal Millwright · Put your knowledge to work in context.
The Red Seal endorsement on an Industrial Mechanic (Millwright) Certificate of Qualification certifies that a tradesperson has met a nationally recognized standard of competence in installing, maintaining, troubleshooting and repairing industrial machinery. It is issued through the provincial and territorial apprenticeship authorities that participate in the Interprovincial Standards Red Seal Program, and it is portable across participating jurisdictions. The Red Seal Millwright case studies are 5 cases and about 3,959 words.
1Two-Leg Bridle Lift of an Off-Centre Compressor Skid
A 5,400 lb skid-mounted compressor is being lifted off its housekeeping pad onto a flatdeck trailer. The skid has two lifting lugs 6 ft apart along its length; the centre of gravity is 2.5 ft from lug A and 3.5 ft from lug B.
763 words, about 4 min2Substituting a Gear Reducer With the Wrong Ratio
A bucket elevator is down. Its 15 hp, 1,765 rpm TEFC motor is direct-coupled to a 12.6:1 helical reducer that has failed; the reducer output drives the head shaft through a 1:1 chain drive (20T driver, 20T driven).
787 words, about 4 min3Spun Motor Bearing - Reading the Journal
A 150 hp, 1,780 rpm motor on a forced-draft fan failed with a growling drive-end bearing. The 6316 C3 bearing came off with a blued inner ring and metal transfer, and the shaft shows a polished band.
765 words, about 4 min4Alignment on a Hot Water Pump After a Motor Change
A 75 kW end-suction pump handling 120 C water is being recommissioned after a motor replacement. The coupling is a 6 in spacer elastomer type.
789 words, about 4 min5NPSH Shortfall on a Hot Water Transfer Pump
A centrifugal pump takes suction from an open tank of 80 C water (vapour pressure 47.4 kPa abs, density 971 kg/m3) whose surface is 3 ft below the pump centreline. At the design flow of 400 gpm the suction line friction loss is 4.5 ft and the curve shows NPSHR of 14 ft.
855 words, about 4 min