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This standard describes the various types and classes of cold-water displacement
meters with bronze main cases, in sizes 1/2 in. (13 mm) through 2 in. (50 mm),
and the materials and workmanship employed in their fabrication. The displacement
meters described, known as nutating-disc or...
Back to AWWA C700-09 Cold-Water Meters—Displacement Type, Bronze Main Case (PDF)
This standard describes the various types and classes of cold-water displacement
meters with bronze main cases, in sizes 1/2 in. (13 mm) through 2 in. (50 mm),
and the materials and workmanship employed in their fabrication. The displacement
meters described, known as nutating-disc or oscillating-piston meters, are
positive in action because the pistons and discs displace or carry over a fixed quantity
of water for each nutation or oscillation when operated under positive pressure. Major revisions made to the standard in this edition
include the following:
fire-flow meter use has been clarified (Sec. II.A);
new text has been added to number-wheel numerals (Sec. 4.3.3.2);
mechanism details section has been removed (Sec. 4.3.3.3);
a footnote to safe maximum operating capacity has been added (Table 1,
p. 9);
text has been added to register dial type (Sec. B.2); and,
the time that the test pressure is to be applied has been added to pressure
tests (Sec. B.3.2).