Power Volume . 55, 17

Power Volume . 55, 17

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 edition. Excerpt: ...In this case the only danger would be that steam might be produced faster than the safety valve could release it. This would result in an increase of pressure in the boiler which would automatically retard the steam production by increasing the temperature of the steam. New Orleans, La. Fred Boone. Blowing Off Not Dependable for Keeping Boiler Clean While burning waste paper in the furnace of a return-tubular boiler that had been installed for about six weeks, a bad bag was noticed in the bottom of the shell close to the front end. The question arises whether the boiler had been properly blown down as required every 8 hours, or whether the place where the bag formed was too remote from the blowoff to keep that part of the boiler free from scale by blowing off. M. W. Bagging resulted from not cleaning the boiler often enough. No general rule can be laid down for the length of time that should intervene between the cleanings, because with a scale-bearing feed water, the scale forms faster from forcing the boiler than from more moderate use, and with some feed waters the scale forms faster than with others. A boiler attendant must learn for himself, by frequent inspection, how often his boiler may need cleaning to avoid deposits of scale or oil, as bagging may be caused by the least accumulation of oil or of thin hard scale that cannot be removed by blowing off the boiler. Changing No-Voltage Release Coil on a Compensator If a 440-volt compensator used for starting an induction motor is changed to operate on 220 volts what changes are necessary to make in the no-voltage release coil to have it operate satisfactorily on the lower voltage? The 440-volt coil is wound with one pound of No. 26 double-cotton-covered wire. M. R. A. The problem is to...show more

Product details

  • Paperback | 62 pages
  • 189 x 246 x 3mm | 127g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236592239
  • 9781236592231