Transactions of the American Society of Heating and Ventilating Engineers Volume 24

Transactions of the American Society of Heating and Ventilating Engineers Volume 24

List price: US$18.94

Currently unavailable

Add to wishlist

AbeBooks may have this title (opens in new window).

Try AbeBooks

Description

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. 1919 edition. Excerpt: ...tank itself. Through a f0ur--way valve at the top of the filter, the water for circulation in the house system passes into the space above the filter bed and down through the sand into a chamber at the bottom. In this passage, the rust formed in the deactivation of the water is wholly removed. The house supply is withdrawn through the vertical pipe in the center of the filter, while the gravity return line entering at the bottom provides for a continuous circulation of water. It is thus apparent that we have three complete and independent systems of circulation: (1) the one between the heater and tank, (2) that between the filter and tank for keeping the former hot, and (3) the house and filter system. The success of the apparatus in removing the dissolved oxygen from the heated water is shown in Table 1. That this removal of oxygen is accompanied by highly beneficial results will be understood from a comparison of present and past conditions at the apartments. When the deactivator was placed in operation, each hot water system had been in service for about eleven years. 'The one which we are particularly considering had been the source of great trouble and complaint and pipes were giving way very frequently. It had also been necessary to place three plugs in the supply tank where corrosion had caused the formation of large pits which broke through the metal. Everything in fact pointed toward the rapid destruction of the system. When the deactivator was installed, these sources of annoyance immediately ceased; and since that date no replacements have been necessary. On the other hand, the system which was not equipped with a deactivator went completely to pieces in a few weeks' time. Fifteen holes in the tank were plugged, and...show more

Product details

  • Paperback | 152 pages
  • 189 x 246 x 8mm | 286g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236843053
  • 9781236843050