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What is a positive displacement water meter?

What is a positive displacement water meter?

Positive displacement flow meters measure the volumetric flow rate of a moving fluid or gas by way of precision-fitted gears or rotors containing cavities through which precisely known volumes of fluid pass. Positive displacement flow meters are very accurate and have high turndown.

Who makes Hersey water meters?

Mueller Co.
Hersey Meters has been part of Mueller Co., one of Mueller Water Products’ three operating units, since 1988 and has been in existence since 1859.

What is the common disadvantage of all positive displacement meter?

Limitations of positive displacement meters They are normally limited to higher viscosity fluid – with very low viscosity liquid or in gas this meter is less accurate because there is more leakage in the internal sealing surface. Sudden change in flow may damage the moving parts due to inertia.

How does positive displacement flow meter work?

How Does a Positive Displacement Flow Meter Work? All positive displacement flow meters operate by passing isolated, known volumes of a fluid through a series of gears or chambers within the meter. By counting the number of passed isolated volumes, a flow measurement is obtained.

What do the numbers mean on a water meter?

What do the numbers mean? Numbers in the black boxes show the amount of cubic metres of water you have used. You are charged for every cubic metre, so you only need to record the numbers in the black boxes. The numbers in the red boxes record tenths and hundredths of a cubic metre. When to read your meter.

How do remote read water meters work?

Elimination of estimated bills. How does AMR work? Using wireless radio transmitters AMR remotely reads customer meters and then transfers the data into billing system. AMR will drastically reduce the need for meter readers to manually gather utility meter readings.

What is a water meter used for?

A water meter is measures the quantity (volume) of water that passes through a pipe or other outlet. Typically, meters use a standard unit of measure for volume, such as cubic feet or gallons.

What are meter registers?

Meter Register means a device, normally associated with a Meter, from which it is possible to obtain a reading of the amount of Active Energy, or the amount of Reactive Energy that has been supplied by a circuit. All Meters shall include a non-volatile Meter Register of cumulative energy for each measured quantity.

What is the accuracy range of a positive displacement flowmeter?

Positive-displacement meters provide high accuracy, ±0.1% of actual flow rate is claimed, and good repeatability. Their accuracy is not affected by pulsating flow and many designs do not require a power supply nor lengths of straight pipe upstream and downstream in their installation.

What are the applications of positive displacement flowmeter?

Applications of positive displacement flow meters:

  • Measuring volumetric flow of liquids/ fluids in pipes.
  • Chemical industries to accurately estimate the flow of viscous fluids and various chemicals, hydrocarbons, and cryogenic liquids.
  • Measuring individual flow of liquids in a two component mixer.

What is a Hersey MVR meter?

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.

Why choose Hersey PD meters?

The largest measuring chamber in the industry allows Hersey PD meters from Mueller Systems to outperform all others. Rugged bronze cases in 5/8″ through 2″ sizes give you years of unwavering, unsurpassed service. NSF-61 compliant meters can be ordered as an option.

Which nsf-61 compliant meters can I order?

NSF-61 compliant meters can be ordered as an option. Equipped with either a Translator ® encoder register and your choice of electronic options or with a standard visual-read register, the Hersey PD meter from Mueller Systems offers exceptional tamper protection.