500 SERIES POSITIVE DISPLACEMENT DISC METER

APPLICATIONS: Measurement of cold water for residential, commercial and industrial applications where water volumes are low, and low flow sensitivity is important.

CONFORMANCE TO STANDARDS: Hersey Series 500 IIS Water Meters comply with 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 Series 500 IIS Water Meters consist of three basic parts: maincase; measuring chamber; and permanently sealed register. The maincases and topcases are made of bronze. The measuring chamber, nutating disc and strainer are made of thermoplastic, which is dimensionally stable and will not corrode. An optional test port in the body permits in-line testing. Register box and lid are available in plastic or bronze. The meter is designed so that the register, measuring chamber and strainer 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 readings systems available for increased reading efficiency (see Meter Reading Systems.)

OPERATION: Water flows through the meter's strainer where any debris that could adversely affect meter accuracy or free operation is screened out. As the water enters, it 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 measuring chamber requires fewer nutations of the disc for each gallon measured, which helps to limit wear, reduce pressure loss and extend the life of the meter.

MAINTENANCE: The Hersey Series 500 IIS Water Meters are designed and manufactured to provide long service life with virtually no maintenance required.

CONNECTIONS: Available with integral two-bolt oval flanges.

Model Number
562IIS and 572IIS

Sizes
1-1/ 2" and 2"

Standards
Manufactured and tested to meet or exceed all applicable parts of ANSI/AWWA C700 Standard.Envirobrass options meet requirements of NSF Standard 61.

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 100F water temperature

Measuring Elements
Nutating Disc

Disc Nutations (per Gallon)
562IIS: 6.47, 572IIS: 3.92

Register Type
Straight reading, permanently sealed,
magnetic drive with low flow indicator. Remote reading units optional

Meter Connections
1-1/ 2" size and 2" size available with two bolt flanged ends.

Materials
Maincase - bronze UNSC84400;
Measuring Chamber - thermoplastic; Magnets - ceramic; Strainer - thermplastic; Casing bolts - stainless steel ANSI B18; Register box and lid - thermoplastic.

Options
Meter Case - Enviro Brass UNSC89520. Register box and lid - bronze UNSC85700; AMR Reasing Systems.

Toomey Water Services 2007 created and maintained by jra design