The variable area flow meter is an industrial flow meter used to measure the flowrate of liquids and gases. Variable area flowmeters for simple and costeffective flow measurement of gases or liquids without auxiliary power glass and metal tube purgemeters for lowflow applications flow rate of fluid in a closed tube. Variable area flowmeter v31 housing in stainless steel borosilicate glass only 4 sealing rings service kind construction replace v16 v15 v30 limit switches options chip guard operating principle the measuring element is composed of a float and a conical glass tube. A variable area flowmeter s cross section area available to the flow varies with the flow rate.
Glass tube variable area flowmeter for a high degree of reproducibility. Variable area flowmeters for gases with attractive design our proven qflow is a modern vaflowmeter for gases built on the variable area principle. Variable area glass flowmeters are designed with easy to read scales. Our emerson mining advisor applications will be on display. The variable area flow meter for gases is highly dependent on the pressure in the measuring tube. Variable area flow meters variable area flow meters, thermal mass flow meters, thermal mass flow controllers, multiparameter mass flow controllers, paddlewheel meters, pumps, vortex flow meters, valves, accessories, aalborg, flow meter, rotameters, mass flow meters, mass flow controllers, vortex, valves.
Asameters model cg3839 all made of stainless steel are designed for medium and high flow rates for every kind of gas mod. Variable area flow meters rotameters brooks instrument. The float is pushed up by increasing fluid flow and pulled down by gravity as fluid flow decreases. Variable area flowmeter basic fundamentals and descriptions d184b003u46 1 principle of operation the principles of operation of the variable area flowmeters are described in the vdivdeguideline 35 as follows. Talk to us for more on our range of flow meter types for gas and water, and see why brooks instruments leads the world in variable area flow meters.
Thus, in the area meter, flow is indicated as a function of the area of the annular opening through which the fluid must pass. Variable area flowmeters use a tapered tube design to measure fluid flow. Electromagnetic flowmeter,vortex flowmeter,turbine flowmeter. The meter see figure 1 is composed of a vertically tapered tube through which the fluid to be measured is passed from the smaller end up to the larger.
Variable area flowmeters swagelok variable area flowmeters measure the flow rate of liquids and gases by means of a tapered tube and float. Flow transmitter max flow indicator digital rotameter. The different sensors include dial, inline, ultrasonic, orifice plate, totalizing meters, variable area, venturi, or with switch output. Flow measurement flow metering principles orifice, venturi, flow nozzles, pitot tubes, target, variable area, positive displacement, turbine, vortex, electromagnetic, ultrasonic doppler, ultrasonic timeoftravel, mass coriolis, mass thermal, weir vnotch, flume parshall and sluice. As the flow of product increases through the flow meter, the position of the float or needle indicator changes relative to the scale engraved on the flow meter to give a visual indication of the current flow rate that is easily read by the user. Trust the expertise of the brooks instrument team for valuable insight on the right fluid flow meter for your needs. All fluoropolymer flowmeters offer solutions for measuring flow rates of highly corrosive. This variable area principle consists of three basic elements. The hedland inline flow meter s unique springloaded variable area design allows meters to be installed in any position without affecting accuracy.
Types of variable area flow meters instrumentationtools. They meet the application requirements by featuring a wide range of design varieties and. It is a reliable and easy to read instrument for measuring and monitoring liquid and gas flows. All feature standard scale setup for either air, water or hydraulic oil. Flowmeters may also be equipped with a metering valve which adds the capability of controlling flow rate. In area meter, there is a variable orifice and the pressure drop is relatively constant. The most common design of variable area meter is the coneandfloat type, which is also known as a rotameter. The float is pushed up by increasing fluid flow and pulled down by gravity as fluid flow decreases, except for the springloaded m4h model.
The float responds to change in velocity of the fluid gas, air, or liquid by moving up or down the flow tube. Variable area flowmeters for visual or electrical flow. Differential pressure regulators model r880 made of stainless steel 316l, when coupled with asameters model 190019011903 in s. Designed in close collaboration with users, it combines our long experience and practical shopfloor requirements. It is available in singletube and multitube version with many options. Choose the mt3809 variable area va max flow meter rotameter for all the highpressure, hightemperature va flow measurement and control requirements on your next project. The va master is a high accuracy variable area flowmeter suited with state of the art components and a wide angle visual flow indication.
Purge flow regulators, flow meters for solids flow measurement, crosscorrelation. Its based on simple and easytounderstand flow measuring principle but is versatile in the types of fluid it can measure and site conditions, under which it can be. Variable area flowmeters or rotameters are suited for laboratory and industrial applications. Variable area flowmeters for gases with attractive design our proven q flow is a modern vaflowmeter for gases built on the variable area principle. A variable area flow meter or rotameter is a very simple device that measures the flow of most process gases and liquids. Swagelok variable area flowmeters measure the flow rate of liquids and gases by means of a tapered tube and float. Variable area flowmeters for visual or electrical flow rate. Glass and metal tube purgemeters for low flow applications variable area flow meters. Integration of optional flow switches, automated valves or alarms. In case of orifice meter venturi meter, there is a fixed aperture and flow is indicated by a drop in differential pressure. This stands in contrast to flow meters such as orifice plates and venturi tubes where the crosssectional area of the flow element remains fixed variable area flow meter. Variable area flowmeters for use in water treatment systems.
This stands in contrast to flow meters such as orifice plates and venturi tubes where the crosssectional area of the flow element remains fixed. Flow measurement is the quantification of bulk fluid movement. Dwyer offers different types of dial flowmeters for various applications. Variable area flow meters from lake monitors have recently undergone a production redesign. Variable area flowmeter rotameter the original insatech. The position of the control valve must be considered thereby see also valve at the inlet or outlet. Variable area flow meters rotameters, turbine flow meter, target flow meters etc. For simple and costeffective flow measurement of gases or liquids without auxiliary power. You can measure flow through a variety of different devices such as coriolis, differential pressure, vortex, magnetic, ultrasonic, turbine and positive displacement meters. Glass tube variable area flow meter the basic variable area flow meter is the glass tube indicating type. The flowrate scale for flowmeters with glass meter tubes is preferably applied directly on the meter tube. Iz series variablearea flowmeter with metallic measuring tube is the variablearea flowmeter. This flow meter is the most readable product in its class. Ideal for industrial applications with flow rates up to 116 gpm and 250 scfm.
Meters are graduated for direct reading of water and air. Flowmeter design consists of a floatusually a sphereenclosed in a tube. Variable area flowmeters are very simple yet versatile flow measurement devices for use on all types of liquids, gases and steam. It belongs to a class of meters called variable area meters, which measure flow rate by allowing the crosssectional area the fluid travels through to vary, causing a measurable effect.
Suitable for metering carrier gases, liquid, and gas measurement in pilot plants, process flow, and level indicating. The variable area flow meter is a reverse differential pressure meter use to accurately measure the flow rate of liquid and gases. Variable area flow meters sensors and sensing equipment. Under a nearly constant pressure drop, the higher the volume flow rate, the higher the flow path area. Cookies on the omega websites we use cookies on this website, these cookies are. Flow measurement is the process of measuring fluid in your plant or industry. Electromagnetic flow meter, ultrasonic flow meter, laser doppler anemometers etc.
The rotameter variable area flowmeter is one of the oldest and mature principles in flow measurement. The rotameter is one of the oldest and mature principles in flow measurement. Model e is equipped with a flow adjustment valve and is also available in customized designs. A uniformly tapered flow tube, a float, and a measurement scale. The metal float is usually made of stainless steel to provide corrosion resistance. A variable area meter is a type of differential pressure flow meter. Glass and metal tube purgemeters for lowflow applications s cross section area available to the flow varies with the flow rate. Process control instrumentation and process control systems, design and documentation. The simplest example of a variablearea flowmeter is the rotameter, which uses a solid. In this type of orifice meter, there is a fixed aperture and flow is indicated by a drop in differential pressure. Variable area flow meters we offer variable area flow meters available to measure oil, phosphate esters, water and waterbased fluids, as well as air and other compressed gases.
Hedland flow meters are variable area rotameter instruments. Utilizing automated calibration software and a highres vision system, our new proprietary calibration and scaling process records the unique flow profile of each meter during calibration. We offer corrulated and direct flowmeters for common. This is also the reason that the next flow meter type was developed. Variable area flowmeters va master pdf catalogs brochure. All the measurement tubes in this series of variable area flowmeters are made of either glass or plastic. An variable area flow meter is one where the fluid must pass through a restriction whose area increases with flow rate. As gas enters the flowmeter tube, the float is lifted. They operate on the variable area principle, whereby a flowing fluid changes the position of a float, piston, or vane to open a larger area for the passage of the fluid. They provide a simple, precise and economical means of indicating flow rates in fluid systems. The sturdy allmetal design ensures high resistance to pressure. Dependable flow monitoring with our vast line of variable area and piston flowmeters, rotameters, thermal and mechanical flow switches, hydraulic testers. Shop for variable area flow meters online at omega and save on the equipment and devices you need to complete your installation or repair. Variable area basic fundamentals flowmeter and descriptions.
The tube is precision formed of borosilicate glass, and the float is precisely machined from metal, glass or plastic. The variable area flowmeter is an instrument for measuring the flow of liquids and gases in pipelines. These are simple and versatile devices which are used to measure the flow of liquids, gases, and steam. Direct visual indication of flow rate is given by the position of the float, piston or vane.
We have a large inventory of flow meters on hand, including meters with analog outputs, rugged and economical models, inline flow meters, large capacity meters, and more. Easier to read linear scale this flow meter is the most readable product in its class. Pressures up to 414 bar with 1 or 2 settable alarm switch outputs. The hedland inline flow meters unique springloaded variable area design allows meters to be installed in any position without affecting accuracy. G also aggressive, at extreme operating and environmental conditions high pressures andor low. The common types of flowmeters with industrial applications are listed below. Variable area flow meter model e is a high quality acrylic flow meter. Variable area flowmeter basic fundamentals and descriptions. The different designs of the flowmeters have a variety of applications. Variable area flow meter supplier manufacturer flow.
Variable area flowmeters designed to provide economical, accurate flowrate indication for oil and water, many utilize a spring and piston type assembly, which enables them to be mounted in any position, and gives immunity to changes in viscosity. Introduction to pipe flow measurement the process piping. The basic design of a variable area meter is a tapered tube usually glass containing a selfcentring float that is pushed up by the flow and pulled down by gravity. As the fluid flow upwards in the metal tube,the floater moves upwards to a certain position where the lift force and the gravitational force meets balance,at the moment,the circulation area ben. Hedland variable area flow meters and flow switches. We generally supply two ranges of variable area flow meters or rotameters, dfm plastic va meters for vertical installation and the more advanced springloaded hedland. Models 3809g 3809g elf 3809g tfe lined 3810g engineered to work where you need it. The flow rate refers to the speed at which a process fluid is moving through pipelines, orifices, or vessels at a given time. A control valve may be added if flow control is also desired. The dk32 and dk34 variable area flowmeters are versatile and can be used for gases and liquids. Variable area flowmeter rotameter the original yokogawa. The float response to flowrate changes is linear, and a 10to1 flow range or turndown is standard. A flow meter is a test device used to measure the flow rate of process fluids and gases in industrial plants and facilities. Flow rate is a product of the velocity of a fluid and volume.
215 908 1180 887 368 1207 1124 1535 1459 769 1312 1574 173 1478 1445 590 878 1049 1166 1334 1120 432 16 769 641 237 41 1544 36 1228 945 54 1004 1266 40 1300 729 629 978