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. 1916 Excerpt: ... Engines of this type are generally known commercially as four-valve engines, but as this name applies equally well to the ordinary trip-cut-off gear and to others which will be described later, it is best to use some other designation. The term non-detaching Corliss engines seems to best describe them and is ...
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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. 1916 Excerpt: ... Engines of this type are generally known commercially as four-valve engines, but as this name applies equally well to the ordinary trip-cut-off gear and to others which will be described later, it is best to use some other designation. The term non-detaching Corliss engines seems to best describe them and is apparently gaining in favor. Non-detaching Corliss engines generally give diagrams intermediate between those obtained with the low-speed, trip-cut-off mechanism and those obtained from slide-valve engines with the simpler forms of valves, though the later designs very closely approximate the performances of the trip-cut-off Corliss engine. 92. Poppet Valves. Attention has already been called to the fact that the use of highly superheated steam is very effective in lessening or even eliminating initial condensation. Experience has shown that large valves and valves with sliding surfaces such as slide valves and Corliss valves do not work well with highly superheated steam. The large castings warp so that contact surfaces do not remain true and the lack of moisture which acts as a seal nth saturated steam leads to excessive leakage. Difficulty has also been experienced with the lubrication of these sliding types of valves when using highly superheated steam. An old form of valve known as poppet valve has cently been adopt by some builders a solution of difficulties met the use of high superheated steam. This form of valve in four-valve arrangement, combined with designs in which short ports and symmetrical cylinder castings are used, yields very economical engines which can be safely used with a degree of superheat prohibitively high in the case of the sliding and oscillating forms of valves. Sections of a modern type of poppet valve engine are shown in...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
