. Handbook of construction plant, its cost and efficiency. is «-3 8 •S S AIR COMPRESSORS 13 merits are: Lubricator, $; Governor, $; Air gauge, $;Main reservoir, $; Drain cock, $ Standard electric railway compressors without water-jacket foruse in connection with direct current and wound for 600 volts,have also found a great variety of uses where the operation isnot continuous for over 20 minutes or 50% of the time. Fig. Direct Current Motor DrivenAir Compressor. TABLE 2 Cyl. Diam. Displacement, and stroke, cu. ft. per Shipping inches min. 100 lbs. air Price weight 5
. Handbook of construction plant, its cost and efficiency. is «-3 8 •S S AIR COMPRESSORS 13 merits are: Lubricator, $; Governor, $; Air gauge, $;Main reservoir, $; Drain cock, $ Standard electric railway compressors without water-jacket foruse in connection with direct current and wound for 600 volts,have also found a great variety of uses where the operation isnot continuous for over 20 minutes or 50% of the time. Fig. Direct Current Motor DrivenAir Compressor. TABLE 2 Cyl. Diam. Displacement, and stroke, cu. ft. per Shipping inches min. 100 lbs. air Price weight 5 x3 14V2 $275 750 lbs. 5y2x4% 25 325 1,100 lbs. 7 x5 38 425 1,400 lbs. 7%x5 50 475 1,600 lbs. Compressors of this type with direct current motors wound forother voltages, and with single, 2 phase, and 3 phase alternatingcurrent motors of various voltages and cycles are manufactured,but the prices vary too greatly to be tabulated. Cost of Installation. In Gillettes Rock Excavation the costof installing a compressor plant is given as follows:Band, Class C. 24x20-in. compressor, original cost, $4, 150 H. P. locomotive boiler which cost $1, (2nd hand). Plant could furnish 1,300 cu. ft. free air per minute at 80pounds pressure, or enough to run 10 or 12 drills. Cost of installing boiler: 22 days, laborers, at $ $ 23 days, engineers, at $ 13 days, mechanics, at $ 13 days, mechanics, at $ 1 day
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbuilding, bookyear191
