The steam-boiler catechism; a practical book for steam engineers, and for firemen, owners and makers of boilers of any kind ...

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. 1888 Excerpt: ...water to entangle the impurities, which are then removed by the filtering materials. The water enters the clay from the vessel T, enters the filter at A, and leaves at the bottom, through outlet cone valves, K, passing along through X. The filtering material may be washed by closing the regular inlet and outlet valves A and C, opening the valve E at the top, and opening the valve L which connects the valves and outlet pipes. The water then passes up through valves K, loosens the coke and sand, and discharges them in the upper tank, which should be full of water. The dirtied filtering material dirties and displaces this water. Then close L, and open the centre valve F to let the coke and sand back into the filter. Q. Can you describe a filter having mechanical means of refreshing its power? A. In one form, the filtering material is stirred up when desired by two endless chains or sprocket wheels driven by a crank from the outside; and the perforated plate at the bottom has its holes kept free by pins on a plate below it; the same motion which stirs up the filtering material actuating, by an eccentric, this cleaner-plate. Q. What is the AVass grease, air and mud extractor? A. It consists of a cast iron shell having traverse partitions extending alternately from the top and the bottom, partly jecting partitions. Grease rises to the top of the water, and is blown off through an oil-discharge; solid matter is precipitated to the bottom; the air is discharged intermittently at the top by an air discharge valve worked by a float. There is generally a "by pass" to cut the apparatus out when desired to inspect or clean it. MECHANICAL BOILER CLEANERS. Q. What is a "mechanical" boiler cleaner? A. One which by mechanical means only collects and remo...