|
APPLICATIONS: Measurement of water
for residential, commercial, industrial
and residential fire applications, where
sensitivity to low flow is also important.
Hersey MVR meters are among the most sensitive
vertical turbine meters available and may
be used in place of compound meters in some
applications. The compact design and integral
strainer (separate external strainer is
not needed) of Model MVR meters facilitate
installation in tight spaces. They are ideal
where flexibility is needed to meet wider
flow ranges, where water temperatures are
elevated between 80F and 130F, or where
sand particles or other small debris may
be encountered. May be installed vertically
or horizontally for greater installation
flexibility.
CONFORMANCE TO STANDARDS: Hersey
Model MVR Water Meters comply with ANSI/AWWA
Standard C701 Class I. Each meter is tested
to ensure compliance. EnviroBrass® options
conform to the NSF 61 Standard.
CONSTRUCTION: Hersey Model MVR Water
Meters consist of three basic parts: maincase;
rotor assembly; and a permanently sealed
register. Maincases are made of bronze for
long life. Rotor assemblies are thermoplastic,
which is dimensionally stable and will not
corrode. Retro Thrust rotor design extends
the life of the meter by dividing wear between
two points: during low flow the tungsten
carbide thrust bearing floats against a
sapphire bearing surface; during high flow
the stainless steel shaft gently contacts
a second sapphire bearing. During medium
flow, the rotor floats between the thrust
bearings without contact. Optional test
ports are available on all sizes 1-1/2"
and larger. The measuring chamber is protected
by an internal strainer. No external strainer
is required.
REGISTER: Permanently sealed register
has a unique seal and heat-treated glass
to eliminate dirt, moisture infiltration
and lens fogging. The totalizing register
has a straight-reading odometer type display,
a 360º test circle with center sweep
hand and a low flow (leak) detector.
All Hersey meter Models have electronic
meter reading systems available for increased
reading efficiency (see Meter Reading Systems.)
OPERATION: Water flows through the
integral strainer and into the vertical
turbine assembly. There the direction of
the water flow is directed by the hub into
the rotor at the precise angle necessary
for accurate measurement over the full range
of flow rates.No straight pipe requirements
apply before or after the meter. The turbine
turns freely and rotates in direct proportion
to the volume of water passing through the
meter.
The Model MVR turbine operates more quietly
than conventional disc or piston meters.
MAINTENANCE: The Hersey Model MVR
Water Meters are designed and manufactured
to provide long service life. The register
on all sizes, and meter interior and strainer
on sizes 3" and larger, can be replaced
without removing the meter from the line.
Modular design and economical internal parts
allow for inexpensive, speedy rebuilds.
Optional built-in test ports make field
testing easy and convenient.
CONNECTIONS: Available with external
(N.P.S.M.) straight pipe threads (ANSI B1.20.1)
on 3/4" and 1" sizes; integral
two-bolt oval flanges or internal (NPT)
pipe threads (ANSI B1.20.1) on 1-1/2"
and 2" sizes. ANSI class 150 flanges
on 3" through 6" sizes (class
125 cast iron or class 150 bronze companion
flanges available on request).
 |
Model Number |
MVR 30, MVR 30A, MVR 30B,
MVR 50, MVR 100, MVR 160, MVR 350, MVR
650, and MVR 1300 |
 |
|
Sizes |
3/4"x1/2",
3/4", 3/4"x1", 1",
1-1/2", 2", 3", 4"
and 6" |
|
|
Standards |
Manufactured and tested
to meet or exceed all applicable parts
of ANSI/AWWA C701 Class I Standard |
|
|
Service |
cold water measurement
with flow in only one direction |
|
|
Operating Flow Range |
See Catalog PDF below |
|
|
Accuracy |
See Catalog PDF below |
|
|
Pressure Loss |
See Catalog PDF below |
|
|
Maximum Working Pressure
|
150 PSI |
|
|
Temperature Range |
33F to 130F water temperature
Hot water up to 180° available upon
request. |
|
|
Measuring Element |
Rotor |
|
| |
|
Register Type |
Straight reading, permanently
sealed, magnetic drive with low flow
indicator. Remote reading units optional. |
|
|
Meter Connections |
1/2", 3/4"
and 1" external (NPSM) straight
pipe threads, 1-1/2 size and 2"
size available with either two bolt
flanged ends or internal thread (NPT)
ends same nominal size as size of meter,
3" thru 6" ANSI class 150
flanges. |
|
|
Materials |
Maincase - bronze UNSC84400;
3/4"- 1-1/2" Bottom cover
- cast iron ASTM A126 CL. B enamel painted;
2" Bottom cover - bronze UNSC84400;
Rotor assembly - thermoplastic; Strainer
- thermoplastic std. in 3/4" thru
1-1/2"; or stainless steel (2"
- 6"); Casing bolts - stainless
steel ANSI B18. |
|
|
Options |
Meter case - EnviroBrass ® UNSC89520.
Stainless steel ring strainer is available
on 3/4", 1" and 1-1/2"
meters.
AMR reading Systems.
|
|
