Design/Operation
Velocity-type meter meeting or exceeding the
performance requirements of AWWA Standard C-708.
Water, evenly distributed by multiple
precision-machined jet nozzles, flows past an
impeller in the measuring chamber, creating an
impeller velocity directly proportional to water
flow rate. The meter's register integrates
velocity into totalized flow.
Temperature
Limit
Meters are designed to operate to 194°F.
Main
Case
Waterworks bronze case of 81% copper composition,
painted red to designate hot water application.
Bronze register rings are standard. 5/8" to
1" sizes provided with externally threaded
ends. 1-1/2" and 2" supplied with either
externally threaded or oval flanged ends.
5/8" to 1" designs incorporate wrench
pads to aid installation.
Measuring
Chamber
The measuring chamber housing and measurement
element are constructed of a durable synthetic
polymer and can easily be removed from the main
case without removal of the meter from the line.
The chamber housing is constructed in two parts to
allow access to the impeller.
Measurement
surfaces are not wear surfaces, providing
sustained accuracy despite the presence of
entrained solids in the water. A long-life,
sapphire bearing serves as a wear surface, with
balanced water flows minimizing bearing wear.
Magnetic
Drive
A reliable, direct magnetic drive provides linkage
between measurement element and register. No
intermediate gearing is required; no gearing is
exposed to water.
Strainer
A rugged, 360-degree polymer strainer protects the
critical measuring element from damage due to
entrained solids.
Adjusting
Port/Tamper Detection
Sealed after factory calibration. Port is
accessible for utility recalibration, to
compensate for inaccuracy in older meters without
parts replacement. The Master Meter Multi-jet
adjusting port is sealed to prevent tampering and
provides a visual indication of tampering
attempts.
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Register
Standard direct read, DIALOG® Meter
Reading System and Electrical Output Registers are
available. A six wheel odometers is standard.
- Register
Sealing
All registers are permanently sealed, with a
stainless steel base and wrap-around gasket to
prevent intrusion of dirt or moisture. Direct
read and DIALOG® System registers
also incorporate a tempered glass lens.
- Registration
Units
Registration available in U.S. gallons, cubic
feet, or cubic meters.
- Test
Circle
Large center sweep hand with ten clearly
indicated graduations per minimum registration
unit.
- Low
Flow Indicator
Center mounted indicator with high sensitivity
resulting from direct measurement element
linkage.
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