Valve Gears; Steam Pumps; Elevators

Valve Gears; Steam Pumps; Elevators

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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. 1908 edition. Excerpt: ...difference in level between the centers of the vacuum gauge and pressure gauge was 10 feet? Ans. 93,555,123 ft.-lb. 17. Calculate the area of the suction and delivery pipes for a single acting pump that is to discharge 1,250 gallons of water per minute. Ans Suction pipe, 120.3 sq. in. ' Delivery pipe, 60.15 sq. in. 18. If the plunger of a single-acting pump has a speed of 85 feet per minute and a diameter of 6 inches, what will be the velocity of the water in the delivery pipe if the latter has an area of 6 square inches? Ans. 400.5 ft. per min. SELECTION OF PUMPS. SERVICE OF DIFFERENT TYPES OF PUMPS. 53. Intr0ducti0n.--The service for which a pump is required determines its general type, that is, whether it is to be a plunger pump, a rotary pump, a centrifugal pump, or a screw pump. 54. Reciprocating Pumps.--The various types of reciprocating pumps are selected when high efficiency is required and a fluid for which they are suited is to be pumped., 55. Rotary Pumps.--The rotary pump is chosen when the fluid to be pumped is water holding in suspension large masses of soft material. It is much used in paper mills for pumping the pulp from one stage of its manufacture to another. Rotary pumps are small and occupy, relatively, but little space for their capacity; they are also light, simple, and inexpensive, but are low in efficiency and are short lived, particularly if the material pumped contains much sand or other grit. The rotary pump is used with good success on some steam fire-engines, where light weight and simplicity are more important than high efficiency. 56. Centrifugal Pumps.-----Centrifugal pumps are used where large volumes of water are to be lifted to moderate heights. They are also well adapted for pumping large quantities of...show more

Product details

  • Paperback | 110 pages
  • 189 x 246 x 6mm | 213g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236880749
  • 9781236880741