. Handbook of construction plant, its cost and efficiency. ctors use where thetotal i water pressure to be pumpedagainst is not over 35 to 50 lbs. persquare inch. PULSOMETEE. A very well known steam operatedvacuum pump is the one illustratedin Fig. 237. It consists of two bottleshaped cylinders with the necessaryvalve inlet and outlet pipes. Theoperation of this pump is sustainedby alternate pressure and , cushioned by a layer of airautomatically admitted, is brought tobear directly upon the liquid in thepump chambers and forces it outthrough the discharge pipe; the sub-sequent rap
. Handbook of construction plant, its cost and efficiency. ctors use where thetotal i water pressure to be pumpedagainst is not over 35 to 50 lbs. persquare inch. PULSOMETEE. A very well known steam operatedvacuum pump is the one illustratedin Fig. 237. It consists of two bottleshaped cylinders with the necessaryvalve inlet and outlet pipes. Theoperation of this pump is sustainedby alternate pressure and , cushioned by a layer of airautomatically admitted, is brought tobear directly upon the liquid in thepump chambers and forces it outthrough the discharge pipe; the sub-sequent rapid condensation of theiV,|« steam, effected by the peculiar con- ^^-jBR BBl~ struction of the pump, forms a *Jjatss? vacuum in the working chambers, into which atmospheric pressureforces a fresh supply of liquidthrough the suction pipe. This action is maintained quite auto-matically, and is governed by a self-acting valve ball in theneck of the pump, which obeys the combined influences of steampressure on one side and vacuum on the other. The valve ball. Fig. 237. 518 HANDBOOK OF CONSTRUCTION PLANT oscillates from its seat in the entrance to one chamber to itsseat in the entrance to the other chamber, thereby distributingthe steam. This pump will do all classes of rough service raising waterup to 75 feet elevation. It has no piston, no packing, no oil,and seldom breaks down, but is very uneconomical of steam. TABLE 141—PULSOMETER PUMPS. Capacity in Gals, per Price,Size of Pipe (Ins.)Min. at Different Eleva- f. o. b. ~ tions and Boiler H. P. New York £ c3 ID o m fe ft fc fc W ?3 » M U CO PH2 5 n o K3 in ffi S8 1 2 % 1% i% 20 17 13 4 $ 68 $ 71 95 3 % 2 2 60 50 38 5 90 95 140 4 . y2 2y2 2% 100 80 65 6 135 142 295 5 % 3 3 180 160 115 9 158 168 430 6 % 3y2 3% 300 265 200 12 203 217 570 7 % 4 4 425 375 275 15 248 270 745 8 i 5 5 700 625 450 25 360 396 1,375 9 i% 11 6 1,000 900 650 35 450 /495 2,100 10 2 8 8 2,000 1,800 1,400 70 900 3,800
Size: 1061px × 2356px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbuilding, bookyear191
