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APPLICATIONS: The Hersey Meters
MCT II Compound Magnetic Drive Meter is
designed for applications where a high degree
of accuracy is required over a wide range
of water flow rates. Hotels, motels, institutions,
schools, factories, office buildings, apartment
building and commercial properties are examples
of installations where domestic or process
water services may have widely varying flow
rates.
CONFORMANCE TO STANDARDS: Hersey
MCT II Compound Water Meters comply with
ANSI/AWWA Standard C702. Each meter is tested
to ensure compliance.
CONSTRUCTION: Hersey Model MCT II
Water Meters consist of a positive displacement
measuring chamber, a turbine type measuring
chamber and an automatic control valve.
A nutating disc style positive displacement
chamber was selected for it's low flow sensitivity
to accurately measure the lower flows. A
rugged torent-style turbine measuring element
was selected to measure the higher flows
giving the compound meter assembly a wide
operating range with excellent low flow
sensitivity and durability. Internal strainers
protect both measuring elements and the
torent chamber is not sensitive to turbulence,
eliminating any need for an external strainer
in front of the meter. Separate registers
are provided for each measuring chamber.
The automatic valve is a weight and lever
that opens automatically to control the
point at which the mainline meter registers.
The meter is constructed so that all components
are accessible without removing the meter
from the line.
REGISTERS: Permanently sealed registers
use proven magnetic drive design and the
exclusive Hersey triple seal to provide
clarity and error free meter reading. Internal
gears in all assemblies are self-lubricating,
molded plastic for long life and minimum
friction. The standard dual registers include
a straight reading, odometer- type, totalization
display, a 360 degree test circle with center
sweep hand, and a low flow indicator. The
Calibrator Gear Train permits accuracy calibration.
All Hersey models are available with electronic
meter reading systems for increased meter
reading efficiency. (See
Automatic Meter Reading Equipment)
OPERATION: During flow rates all
water flows through the bypass section and
is registered by a sensitive positive displacement
nutating disc meter. When pressure loss
through the bypass section approaches 4
psi, the mainline lever valve automatically
opens and the mainline meter begins to register
the higher flows. The bypass meter continues
to register flow through the bypass section
at a rate well below its maximum capacity.
When flow rate decreases sufficiently, the
lever valve closes and lower flows are again
registered by the bypass meter alone. The
registers' combined readings indicate total
usage.
MAINTENANCE: The Hersey MCT II Meters
are designed and manufactured to provide
long service life.
CONNECTIONS: Available with integral
two-bolt oval flanges on 2" size, ANSI
class 150 flanges on 3" through 6"
sizes (class 125 cast iron or class 150
bronze companion flanges available on request).
ANSI class 125 cast iron flange on 8"
size.
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Model Designation
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MCT II (2"-8") |
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Sizes |
2", 3", 4",
6" and 8" |
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Standards |
Manufactured and tested
to meet or exceed all applicable parts
of ANSI / AWWA C702 Standard |
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Service |
Cold water measurement
with flow in one direction |
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Operating Flow Range |
See Catalog PDF below |
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Accuracy |
See Catalog PDF below |
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Maximum Pressure Loss |
See Catalog PDF below |
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Maximum Working Pressure
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150 PSI |
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Temperature Range |
33F to 100F water temperature |
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Measuring Elements |
Torrent Wheel and Nutating
Disc |
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Register Type |
Permanently sealed, straight
reading, magnetic drive with low flow
indicator. Remote reading units optional. |
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Strainers |
Internal strainers protect
both measuring elements eliminating
the need for an external strainer. |
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Meter Connections |
2" size available
with two bolt flanged ends 3" thru
6" ANSI class 150 flanges, 8"
ANSI class 125. |
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Materials |
Maincase - (2"-6")
bronze UNSC84400, (8") cast iron;
Magnets - Ceramic; Strainer - thermoplastic;
Casting bolts - steel ANSI B18; By-pass
chamber - (2"-4") three piece
thermoplastic, (6" & 8")
bronze UNSC84400; Mainline torrent -
(2"-3") thermoplastic, (4"-8")
bronze UNSC84400. |
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Options |
AMR Reading Systems,
Trim Valves |
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*8" size is different from 2"-6"
sizes in that it is cast iron with two-piece
body and external bypass. |
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