Variable area flowmeters are very simple yet versatile flow measurement devices for use on all types of liquids, gases and steam. Variable area flow meters type 335, type 350 short version. Calibration all flow meters are individually calibrated for fluids with the. The position of the float is magnetically transmitted to an analog. Acrylic and polysulfone variable area flowmeters by bluewhite industries made in the usa, continuous innovation, exceptional customer service. Glass and metal tube purgemeters for lowflow applications 1. Variable area flow meter, variable area flowmeters, flow metering. The flow meters are available with three different glass tube lengths aluminium or stainless steel the bodies are available in aluminium or stainless steel.
An elongated upright core tube within the body portion receives the flow from the inlet end and is provided with at least one longitudinally extending slot by which the flow is transmitted to the outlet end. Variable area flowmeter basic fundamentals and descriptions. The dk32 and dk34 variable area flowmeters are versatile and can be used for gases and liquids. Variable area flow meters are simple and versatile devices that operate at a constant pressure drop and measure the flow of liquids, gases, and. It is a variable area meter which works on the principle of upthurst force exerted by fluid and force of gravity. Product information sensors and instrumentation function and benefits the sinker measurement principle is a proven method for the precise measurement of liquid and gaseous media. For decades variable area flowmeters have become established in industrial measurement technology with an economical, mature measurement principle. An example is our glass meter which resists highly. Ease of installation variable area flow meters are easily installed. These meters are indispensable where high pressure operating conditions exist. The float movement is restricted by the float stops 4 and a protective housing 6 surrounds the meter tube.
The common types of flowmeters with industrial applications are listed below. 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. Armored variable area flow meters brooks instrument. Each variable area flow meter is designed to operate under a certain set of conditions which include the temperature, pressure and the type of gas. Variable area flow meters rotameters brooks instrument. Glass tube differential pressure regulators model r880 made of stainless steel 316l, when coupled with asameters model 190019011903 in s.
This mechanical principle is as simple as it is reliable. Variable area flowmeter metal cone variable area flow. The float response to flowrate changes is linear, and a 10to1 flow range or turndown is standard. The variable area flowmeter is a reverse differential pressure meter used to accurately measure the flow rate of liquids and gases. The hedland inline flow meter s unique springloaded variable area design allows meters to be installed in any position without affecting accuracy. Proper mounting of your variable area flow meter for general applications where the system is venting to atmosphere the flow meter should be mounted as shown on left. The allmechanical sensing system directly drives the pointer and remote signaling devices.
The simple mechanical connection directly drives pointers, switches and transmitters. Operation after the flowmeter has been installed in the flow system, it is ready for operation. The float is pushed up by increasing fluid flow and pulled down by gravity as fluid flow decreases, except for the springloaded m4h model. An optional inverted scale is available for these applications. Every swagelok variable area flowmeter is factory calibrated to the selected media, flow range, and accuracy class using clean, dry air for air flow range models and water for water range models. Available with following options or combinations of options. Usually, these conditions are documented directly on the tube enclosure of the variable area flow meter, with the flow rate scales refer. The units are available in several lengths and accuracies. The standard flow meter is a unidirectional device. The variable area meter consists of a tube and float. All the measurement tubes in this series of variable area flowmeters are made of either glass or plastic. Variable area flowmeter ariable area flowmeter rotameter. Product information sensors and instrumentation flow.
Variable area flowmeter rotameter the original yokogawa. These are simple and versatile devices which are used to measure the flow of liquids, gases, and steam. A variable area flowmeter figure 1 is a device used for measuring the flow of gases or gas mixtures. Model mt3750 pressure equipment directive 201468eu note. If adjustments to flow rates are required, a flowmeter equipped with a metering valve should be selected. Variable area flowmeters g series and m series 1 variable area flowmeters variable area flowmeters g series and m series glass and metal armored tube models, including miniature armored model highly accurate measurement with individually calibrated scales based on flow tests flexible and adaptable to specific system requirements. Metal tube variable area flowmeters table 1 capacities and pressure drop 1. Operating principle of variable area flow meters learning. The area will increase as the flowrate through the meter increases to preserve a constant delta pressure. Lowflow meters purge meters metal the dk32 and dk34 variable area flowmeters are versatile and can be used for gases and liquids. Periodic recalibration is essential as flow meter readings will often go out of phase over time due to variable conditions involved in industrial processes. The sturdy allmetal design ensures high resistance to pressure, temperature and media and stands up to extreme application and environmental conditions.
The hedland inline flow meters unique springloaded variable area design allows meters to be installed in any position without affecting accuracy. The variety in cones, floats, scales, process connections and options combine to make the yokogawa rotameter suitable for a very wide range of applications. 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. These variable area flow meters have a springloaded swinging vane. Shipped completely assembled, flow meters include stan. A sharpedged orifice, located within the piston assembly, forms an annular opening with the contoured metering cone. Equipment falls under sound engineering practice sep according to the directive. Guide to variable area flowmeter application technical sheet ts022vaappguideeng april, 2008 introduction the variable area flowmeter is an industrial meter used to measure the flow rate of liquids and gases. Flow meters can be installed immediately adjacent to 90degree elbows or other components to provide greatest system design flexibility, while saving installation time and money. Float 1, meter tube 2, flowrate scale 3, fittings 5.
Metal cone variable area flowmeter va master fam540. The measurement ranges, which are attuned to our customers needs, and the range of materials available for the tubes and screwed fittings, mean that the flow meters can be used for a wide range of applications and a great variety of media. If no leaks are present, bring the system up to the operating pressure. Variable area flowmeters, g series and m series ms02346. 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 type 350 float in pvdf without magnet with solvent cement sockets pvcu metric. The measuring principle is based on the body being vertically deflected through the flowing medium. The nfx model is a low flow glass tube variable area flow meter. Snapin tube construction minimizes the downtime needed to clean the meter tube or to change the meter range. The float rises within the tube as the flow increases.
Function, material compatibility, adequate ratings, proper installation, operation, and maintenance are the responsibilities of the system designer and user. This flow meter is the most readable product in its class. Parker is a leading manufacturer of variable area va flowmeters that deliver effective solutions for measuring moderate to very low flow rates in a wide variety of liquids and gases. The variable area flow meter is an industrial flow meter used to measure the flowrate of liquids and gases. This bulletin details standard glass tube variable area flowmeters rotameters fitted with a skirted bobbin type float, developed by experience with users requirements specifically for use with anaesthetic gases. The ramc features a float blockage detection system, all mechanical design, and easily replaceable components, making it easy to maintain while delivering high reliability. Variable area flow meters rotameters processproven flow meters. The meter includes a body portion having inlet and outlet ends. Variable area flow meter type 335 float in pvdf with.
A variable area flow meter having a large range of flow measurement. This model can be supplied with a valve fitted to the inline flowmeter. Straight pipe runs before or after the meter are not required. The rotameter variable area flowmeter is one of the oldest and mature principles in flow measurement. This unique design is inherently less sensitive to shock and vibration than other variable area flow meters. Variable area flow meters are used in pipelines and determine the volume flow of liquids or gases there. Variable area flowmeters v100 vogtlin instruments gmbh. For external electrical monitoring, these can be used for fitting magnetically actuated limit contacts. Meters can be calibrated to userspecific applications. Hedland flow meters are variable area rotameter instruments.
The va master fam540 flowmeter can be utilized for measuring the flow of liquids, steam and gases, especially when aggressive or opaque fluids are to be metered. 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. M series variable area flowmeters m1, m2, m4, and m4h models. The kytola variable area flow meter model k is a reliable.
They meet the application requirements by featuring a wide range of design varieties and. Flow measurement is the quantification of bulk fluid movement. Variable area flow meter with glass tube measure principle iz series variable area flow meter with metallic measuring tube is the variable area flow meter. Each version can be supplied with a metering needle valve to provide flow control. The 6000 series are a range of larger glass tube variable area flowmeters. Typically, it consists of a glass metering tube 1 which is.
Variable area flowmeters swagelok variable area flowmeters measure the flow rate of liquids and gases by means of a tapered tube and float. As one of the pioneering manufacturers in variable area va flow meter rotameter technology, brooks instrument has created a diverse and proven portfolio of gas flow meters, installed and in use across virtually every industry. A device used to measure fluid flow, in which a float rises in a tapered vertical tube to a height dependent on the rate of flow through the tube. Flowmeters are shipped assembled and ready for panel mounting.
A lifting body is moved vertically in a transparent tube and indicates the current flow by the respective position on the housing scale. The flowrate tables always indicated the maximum flowrate for the specific meter size and the various meter tube float combinations. The all metal meter is ideal for a variety of gas and liquid applications. As the fluid flow upwards in the metal tube,the floater moves upwards to a certain position where the. Each flowmeter tube is provided with both a glass float and a. Variable area flowmeters must be oriented vertically, except for the m4h model, which is mounted horizontally. The most important variable area flow metering practices and. For simple and costeffective flow measurement of gases or liquids without auxiliary power. Operating manual gt glass tube variable area flowmeter. Variable area flow meters model dual scale range number f40750ln12 f40750ln16 f41017ln12 f41017ln16 f4ln12 f4ln16 gpm 1 to 10 1 to 10 1 to 17 1 to 17 2 to 20 2 to 20 lpm 4 to 38 4 to 38 4 to 64 4 to 64 8 to 80 8 to 80 adapter.
For complete installation information, see the swagelok variable area flowmeters installation instructions, g series and m series, mscrd0111, available only on your swagelok website. The flow meter consists of a conical measuring tube with a float inside it. In its simplest construction, a variable area flowmeter consists of the measurement elements see. The variable area flowmeter is an instrument for measuring the flow of liquids and gases in pipelines. 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. Variable area flow meters badger meter europa gmbh. The ramc variable area flow meter rotameter is a truly universal flow meter, ideal for measuring air and highly aggressive liquids in low and high temperature applications. In addition, the unique springloaded design of this variable area flow meter decreases viscosity sensitivity and allows it to be installed in any position, including inverted, without affecting accuracy. The large variety of instrument designs, their repeatability and independence from supply power requirements for local indication provide a suitable solution in almost every flow metering ap. The flowrate scale for flowmeters with glass meter tubes is preferably applied directly on the meter tube.
Brooks mt3600 series metal tube variable area flowmeters. Flow meter recalibration involves calibration of a flow meter which is already in use. The flow meter generally comprises a vertical, tapered glass tube and a weighted float whose diameter is approximately the same as the tube base. A variable area meter is a type of differential pressure flow meter. Variable area flow meters are radially installed dismountable meters for measuring the flow rate in industrial pipework applications. Part number guide basic a b s bidirectional variable area flow meter ideal for monitoring pump performance and media flows through hydraulic circuits and cooling systems. If using a control valve it should be placed at the inlet side of the flow tube. As the leading manufacturer of hydraulic and pneumatic flow measurement solutions, the hedland product line features over 18,000 inline variable area flow meters sometimes referred to as rotameters to measure petroleumbased fluids, waterbased fluids, water, phosphate esters, pressurized air and other compressed gases. Its operation is based on the variable area principle, where the flow raises a float in a tapered tube increasing the area for passage. The kytola variable area flow meter model k is a reliable instrument for measuring and monitoring of medium range flows of liquids and gases. They are particularly suitable for metering carrier gases in chromatography, in manufacturing processes, liquid and gas measurements in laboratories, pilot plants, flow and level indicating and controlling gases.
Minimum operating pressure downstream on gas service is 35 psig for 12 size. Trust the expertise of the brooks instrument team for valuable insight on the right fluid flow meter for your needs. A rotameter is a device that measures the volumetric flow rate of fluid in a closed tube. High and low flow alarms and a transmitter can be fitted. Ideal for high purity or corrosive liquid applications, gas and liquid applications, air samplers and medical applications. Economical the least expensive method of measuring flow in pipe sizes 3 inches and under. Variable area flow meters working principle variable area flow meters operate at a constant delta pressure. Hedland hydraulic and pneumatic flow meters badger meter. Variable area flow meter supplier manufacturer flow. Variable area basic fundamentals flowmeter and descriptions. Variable area flowmeter rotameter the original ariable area flowmeter rotameter the original precise measurement of liquids and gases robust and universal proven device with an installed base of more than 500,000 worldwide a wide product range many options and different materials available. These are variable area meters with a spring biased semicircular vane that opens wider with more flow.
A rotameter is a device that measures the volumetric flow rate of fluid in a closed tube 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. The specifications corresponding to the individual variable area models include construction details, technical specifications, ma terials used and dimensions together with flowrate tables. Introduction to variable area flow meters the plastic variable area flow meters type 335 350 from gf piping systems are radially installed dismountable meters for flow rate measuring in industrial piping applications. Variable area flow meter with a wide range of options. Vanepiston variable area flowmeters the variable area flow meters are commonly used for monitoring the flow rate of clean fluids such as water, oil, chemicals, brine, deionized water and paint. Basic liquid including water or gas flow measurement. Variable area flow meters for simple and accurate measurement of fluids and gases accessories limit contacts variable area flow meters from george fischer are equipped with two dovetail shafts. Variable area flowmeters v100 measuring tubes in 3 sizes highly modular and adaptable for almost any requirement. The most important variable area flow metering practices. Parkers line of metal, glass and purge flowmeters are an ideal solution for any application.
Variable area flowmeter rotameter the original insatech. Every swagelok variable area flowmeter is factory calibrated to its media, flow range, and accuracy class using clean, dry air for airflow range models and. Variable area flowmeters are the most cost effective solution for almost all applications involving the measurement of industrial process liquids, gases or steam. Hedland variable area flow meters and flow switches. Variable area flow meter type 350 float in pvdf with magnet with solvent cement sockets pvcu metric. An variable area flow meter is one where the fluid must pass through a restriction whose area increases with flow rate. 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. Sep 11, 2014 rotameter variable area meter what is rotameter.
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