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Model Hydrant Meter...

CONFORMANCE TO STANDARDS Hersey Model HM Water Meters comply with ANSI/AWWA Standard C701 class II. Each meter is tested to ensure compliance. CONSTRUCTION Hersey Model HM Water Meters consist of three basic parts D-I-M-E (Drop-In-Measuring-Element), bottom case and register. The D-I-M-E assembly contains all of the working parts inside of the meter and is easily removed from the bottom case when servicing is desired. The bottom case is constructed from cast aluminum to be lightweight and has built in carry handles for portability. The register is enclosed in a lockable bronze register box. The rotor assembly is thermoplastic which is dimensionally stable and will not corrode. The inlet connection has a 2-1/2" female national hose thread swivel adapter and the outlet connection is 2-1/2" male national hose threads. REGISTER The permanently sealed register incorporated a bayonet style locking mechanism with Hersey's unique integral tamper pin. The totalizing register has a straight-reading odometer type display, a 360 test circle with center sweep hand and a low flow (leak) indicator. OPERATION Water flows straight through the turbine section where it turns a rotor at a rate in direct proportion to the amount of water flowing through the meter. The straight-through design allows high volumes to flow with a minimum of head loss. Retro ThrustTM rotor design extends the life of the meter by dividing wear between two points during low flow the tungsten carbide thrustbearing 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. MAINTENANCE The Hersey Model HM Meters are designed and manufactured to provide long service life with virtually no maintenance required. D-I-M-Es are available for field replacement and offer new meter accuracy and warranty benefits without field testing. Existing D-I-M-Es can be returned to the factory for refurbishment with new registers and measuring elements for installation later. CONNECTIONS Available with National Standard for fire hose coupling thread, female and male couplings. CARRYING HANDLE Facilitates ease of transportation....

SIZE MAXIMUM WORKING PRESSURE TEMPERATURE RANGE OPERATING RANGE METER TOP CASE METER BOTTOM CASE MEASURING CHAMBER REGISTER BOX AND LID ...

3" Fire Hydrant Meter...

Materials and Specifications...

Document Keywords

Hydrant Meter docs pdf2 hydrant meter11 08 2010

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