The Heine Safety Boiler Co: Manufacturers of Water Tube Steam Boilers for All Pressures, Duties and Fuels

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Shallcross-McCallum Company, 1897 - 188 стор.
 

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Сторінка 102 - In tests for purposes of scientific research, in which the determination of all the variables entering into the test is desired, certain observations should be made which are in general unnecessary for ordinary tests.
Сторінка 92 - Showing Lbs. Feed-Water per Horse-power required by Pumping Engines per Hour. EDM NoTE. The horse-power is the HP of the water column. The evaporation is assumed at 10 Ibs. water from and at 212° F. per Ib. of coal. Economy in boilers is always stated in "pounds of water evaporated from and at 212° F. per pound of fuel," designated as "Units of Evaporation." (See Vol. VI, Transactions Am. Soc. ME— 1881). Unless a contract specifically provides otherwise the " assumed evaporation
Сторінка 89 - The valves shall be so arranged that each boiler shall have at least one separate safety valve, unless the arrangement is such as to preclude the possibility of shutting off the communication of any boiler with the safety valve or valves employed. This arrangement shall also apply to lockup safety valves when they are employed.
Сторінка 99 - ... while the water is in a quiescent state, just before lighting the fire. At the end of the test remove the whole fire...
Сторінка 102 - ... for purposes of scientific research, in which the determination of all the variables entering into the test is desired certain observations should be made which are in general unnecessary for ordinary tests. These are the measurement of the air supply, the determination of its contained moisture, the determination of the amount of heat lost by radiation, of the amount of infiltration of air through the setting, and (by condensation of all the steam made by the boiler) of the total heat imparted...
Сторінка 91 - ... and each spring-loaded valve shall be supplied with a lever that will raise the valve from its seat a distance of not less than that equal to oneeighth...
Сторінка 99 - The conditions of the boiler and furnace in all respects should be, as nearly as possible, the same at the end as at the beginning of the test. The steam pressure should be the same; the water level the same; the fire upon the grates should be the same in quantity and condition; and the walls, flues, etc., should be of the same temperature.
Сторінка 134 - Each is composed of a head plate and a tube sheet, flanged all around and joined at bottom and sides by a butt strap of same material, strongly riveted to both. The water legs are further stayed by hollow stay bolts of hydraulic tubing, of large diameter, so placed that two stays support each tube and hand hole and are subjected to only very slight strain. Being made of heavy metal, they form the strongest parts of the boiler and its natural supports. The water legs are joined to the shell by flanged...
Сторінка 103 - Percentage of moisture in steam per cent 25. Number of degrees superheated deg. WATER. 26. Total weight of water pumped into boiler and apparently evaporated^ Ibs. 27. Water actually evaporated, corrected for quality of steam § Ibs. 28. Equivalent water evaporated into dry steam from and at 212° F.§ Ibs.
Сторінка 101 - The boiler should be run continuously, without stopping for meal-times or for rise or fall of pressure of steam due to change of demand for steam. The draught, being adjusted to the rate of evaporation or combustion desired before the test is begun, should be retained constant during the test, by means of the damper.

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