Flomec D-40 Manuel d'instruction - Page 3

Parcourez en ligne ou téléchargez le pdf Manuel d'instruction pour {nom_de_la_catégorie} Flomec D-40. Flomec D-40 15 pages. Oval gear medium capacity positive displacement pulse flowmeters 1/2”

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General

1.1 Overview

The Oval Gear meter is a precise positive displacement flowmeter incorporating a pair of oval geared rotors.

These meters are capable of measuring the flow of a range of clean liquids such as fuels, fuel oils & lubricating

liquids.

The flowmeter is available with a pulse output only for safe or hazardous areas. The meter also has a flow rate

areas. Both these totalisers have pulse output capabilities of interfacing to most monitoring and control

instrumentation. The RT12 instrument also has monitoring and control output options 4-20mA, scaled pulse and

flowrate alarms.

Both RT12 and RT40 options have multiple display units (kgs, Litres, lbs, Gal and m³) and can show

instantaneous flow rate and total flow values

1.2 Operating Principle

The Oval gear are positive displacement flowmeters where the passage of liquid causes two oval geared rotors to

rotate within a precision measuring chamber and with each rotation a fixed volume of liquid is displaced passing

through the meter. Magnets embedded within the rotors initiate a high resolution pulse train output. The pulse

output can be wired directly to process control and monitoring equipment or can be used as an input to

instruments supplied with or fitted directly to the meter.

The benefits of this technology allow precise flow measurement and dispensing of most clean liquids irrespective

of their conductivity, with other liquid characteristics having nil or minimal effect on meter performance. This

metering technology does not require flow profile conditioning as required with alternative flow technologies

making the installation relatively compact and low cost.

OPERATION :

Liquid travels around the crescent

shaped chambers created by the

rotational movement of the rotors

liquid entering

measuring chamber

liquid exits the

measuring chamber

flow

liquid in transit