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APPLICATIONS: Measurement of cold
water for residential and small commercial
applications where water volumes are low,
and low flow sensitivity is important.
CONFORMANCE TO STANDARDS: Hersey
Series 400 IIS Water Meters comply with
latest version of ANSI/AWWA Standard C700.
Meters which are manufactured with the EnviroBrass®
maincase option meet the requirements of
NSF Standard 61. Each meter is tested to
ensure compliance.
CONSTRUCTION: Hersey 400IIS Water
Meters consist of three basic parts: maincase;
measuring chamber; and permanently sealed
register. The maincase is made of bronze
for long life. Direction of flow arrows
and model are cast into each maincase. The
bottom cover is epoxy-coated cast iron with
a molded plastic liner separating it from
the waterway. Optional plastic and bronze
bottom covers are available. The measuring
chambers are large for reduced wear during
operation. The measuring chamber, integral
strainer, nutating disc and thrust roller
are thermoplastic, which is dimensionally
stable and will not corrode. Thrust roller
moves smoothly along a stainless steel wear
plate to reduce friction and maintain accuracy.
The register box and lid are available in
plastic or bronze. The meter is designed
so that the register can be replaced without
removing the meter from the line.
REGISTER: Permanently sealed register
has a unique seal and heat-treated glass
to eliminate dirt, moisture infiltration
and lens fogging. An integral tamper-proof
locking feature is provided to resist tampering
with the register. The totalizing register
has a straight-reading odometer type display,
a 360º test circle with center sweep
hand and a low flow (leak) detector. Standard
gearing is used, making registers interchangeable
by size.
All Hersey meter Models have electronic
meter reading systems available for increased
reading efficiency (see Meter Reading Systems.)
OPERATION: Water flows through the
meter's strainer where debris is screened
out. The incoming water fills a known volume
of the measuring chamber on one or the other
side of a movable disc that separates the
chamber into two sections. As water enters
it moves the disc (nutates), forcing a known
volume of water out of the meter from the
opposite side of the disc. The process repeats
as the sections refill and empty in turn.
The nutating action of the disc is coupled
magnetically to the register to indicate
the volume of water that passes through
the meter. The large capacity measuring
chamber requires fewer nutations of the
disc for each gallon measured, which helps
to limit wear, extend the life of the meter,
and reduce pressure loss.
MAINTENANCE: The Hersey Series 400
IIS Water Meters are designed and manufactured
to provide long service life with virtually
no maintenance required.
CONNECTIONS: Supplied with external
straight pipe threads (NPSM) per ANSI B1.20.1.
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Model Number |
430IIS, 442IIS, 452IIS |
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Sizes |
5/8"x1/2",
5/8"x3/4", 3/4"x3/4",
3/4"x1" and 1"x1" |
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Standards |
Manufactured and tested
to meet or exceed all applicable parts
of ANSI/AWWA C700 Standard. EnviroBrass®
options meet requirements of NSF Standard
61. |
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Service |
Cold water measurement
with flow in only 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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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 |
Nutating Disc |
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Disc Nutations (per Gallon) |
430IIS: 49.6, 442IIS:
22.4, 452IIS: 11.7 |
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Register Type |
Straight reading, permanently
sealed,
magnetic drive with low flow indicator.
Remote reading units optional |
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Meter Connections |
1/2", 3/4",
1"
external (NPSM) straight pipe threads
per ANSI B1.20.1 |
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Materials |
Meter case - bronze UNSC84400;
Bottom cover -cast
iron ASTM A126 CL. B; Chamber top/bottom
- thermoplastic;
Nutating disc - thermoplastic; Disc
pin - stainless steel; Thrust roller
-thermoplastic;
Wear plate - stainless steel; Coupling
- Ceramic magnet;
Strainer - thermoplastic; Coupling shaft
- stainless steel ANSI B18;
Bottom cover bolts - stainless steel
ANSI B18;
Register box and lid - thermoplastic. |
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Options |
Meter case - EnviroBrass
® UNSC89520
Bottom cover - bronze UNSC84400 or thermoplastic;
Register box and lid - bronze UNSC85700;
AMR Reading Systems |
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