Highway Engineer and Contractor. Volume 18 - Bookswagon UAE
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Highway Engineer and Contractor. Volume 18

Highway Engineer and Contractor. Volume 18


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About the Book

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 edition. Excerpt: ...compressor at 60 deg. and no heat is lost by radiation. The flash point of a series of paraflin-base compressor oils listed in a pamphlet issued by the Ingersoll-Rand Co. varies from 375 to 500 deg., and the firing point from 425 to 575 deg. The flash point of a series of compressor oils with asphalt base varies from 305 to 375 deg. and the firing point from 360 to 404 deg. It will be noted there is only a small margin between the temperatures generated in the cylin ders and the flash and the firing points of the lubricating oils. Even if the oil vapor would not explode at the firing point, as held by some writers, an oil accumulation may start to burn which in itself might supply sufficient heat to cause an explosion. It seems likely also that an explosion in air lines could be brought about by the compressors being out of adjustment and the heat in the compressed air building up to a dangerous point. Leaky valves in compressors are dangerous and are held by some compressor men as generally being responsible for overheating the air. In some types of compressors the discharge valve in the last-stage cylinder may not be tight, due to carbon deposits or some other cause, and a small part of the heated air may be drawn back into the cylinder with each stroke and be re-compressed. There is a difierence of opinion, however, as to whether a leaky discharge valve can result in excessive over-heating of the compressed air. Theoretically, the air leaking back would cool to the temperature it was in the cylinder before being compressed, but it appears that due to the churning motion of the piston and other heated moving parts the temperature may build up sufficiently to vaporize the oil and cause an explosion. Ordinarily the heat is effectively...


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Product Details
  • ISBN-13: 9781234185008
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 402
  • Spine Width: 21 mm
  • Width: 189 mm
  • ISBN-10: 1234185008
  • Publisher Date: 15 Jan 2013
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 717 gr


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