Engineering and Contracting . t will break beforethe other parts are permanently the bottom is released the measuringchamber is so designed as to be free to fallapart in case it is subjected to an internalstress. Our experience finds that on re-placing a broken bottom of such frozen ^ A / -? / fof / f _ „^ P^ .. ^ 4 / ^y \^ ?^ K 0/ / ?«, ^r rn ^^Worif^ /) y x ^ r^ / ,- ^ e:.&c. ^J5I 25 Q. 5 5 15 10 Z5 30 35 40 45 50 55 60 65 70 75 Pofe cfFo^j Cu Ft Per Mm Fig. 12. Comparative Impedance to Flow ofVarious Types and Sizes of Water Meters meters the accuracy has not been
Engineering and Contracting . t will break beforethe other parts are permanently the bottom is released the measuringchamber is so designed as to be free to fallapart in case it is subjected to an internalstress. Our experience finds that on re-placing a broken bottom of such frozen ^ A / -? / fof / f _ „^ P^ .. ^ 4 / ^y \^ ?^ K 0/ / ?«, ^r rn ^^Worif^ /) y x ^ r^ / ,- ^ e:.&c. ^J5I 25 Q. 5 5 15 10 Z5 30 35 40 45 50 55 60 65 70 75 Pofe cfFo^j Cu Ft Per Mm Fig. 12. Comparative Impedance to Flow ofVarious Types and Sizes of Water Meters meters the accuracy has not been so the measuring chambers of manymakes of disk meters have special featureswhich are advanced as arguments in theirfavor. The wearing surfaces of the meas-uring chamber of a disk meter are confinedto the ball and socket bearing and the di-aphragm. To reduce the cost of repairing abadly worn ball-socket bearing, some firmsconstruct the disk chamber in three parts in-stead of two, so that only the top and bottom. Fig. 13. View of Machine for Testing Small Meters, Ten at a Time. flow. From these curves it is evident thatnear full capacity the impedance of the ve-locity type is much less than that of the disktype, which in turn is less than that of therotary. On their smallest flows the im-pedance of any type is ncgliblc. The factmust not be overlooked that the full capacityDf the disk type can, within limits, be easilyregulated by the size of inlet and outlet pass-ages to the measuring chamber. The meterTianufacturers are quite uniform in the mat-ter of full capacity, disk mutations per cubicfoot, and the size of measuring chamber. This It is not particularly adapted to services thathave small fixtures and openings, for the ve-locity type will not register leaks and willonly partly register the small streams. The disk type is about one-third less infirst cost than the rotary, due in a measureto the greater amount of hard rubber andmachinery necessary in the piston and cham-be
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
