Practical Handbook of Direct-Acting Pumping Engine and Steam Pump Construction (Paperback)

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. 1889 Excerpt: ...the friction in pipes is given, but to avoid the calculation, the Table II., giving the head of water in feet or part of a foot, to overcome the friction of the water in pipes 100 feet long, for a given quantity in English gallons per minute. If the quantity is required in American gallons, it is easily converted by multiplying the English gallons by 12 and dividing the product by 10, the result being number of American gallons. To find the friction of water in pipes: --Bule.--Multiply the quantity of water passing through the pipe in gallons per minute by itself and then by the length of the pipe in yards, divide the product by 3 times the diameter of the pipe in inches raised to the 5th power. The result equals the head of the water in feet to overcome the friction in the pipe. Example.--4 inches diameter of pipe, 200 gallons per minute, 300 yards length of pipe. 2002 x 300 200 x 200 x 300 (3 x 4)5 12 x 12 x 12 x 12 X 12 ' nearly 48 feet head required to overcome the friction. Size Of Steam Ports. The steam ports are made of different proportions by different makers, but a good proportion is th for small sizes, th for medium sizes, and th for large sizes. For large pumping engines the following rule has been found to give good results: --Bule.--Multiply the area of the steam cylinder in inches by the piston speed in feet per minute, and divide the product by 6000. Example.--24 inches diameter of steam cylinder, 120 feet piston speed. 24 inches diameter equals 452 38 inches area. 452-38 x 120 ., gOOQ = 9-04, say 9inches area of steam ports. Depth Of Steam Pistons. The depth of small steam pistons equals one-half of the diameter of the steam cylinder; for larger cylinders it is made one-fourth the diameter. A 4-inch cylinder pist...