These meters employ a patented ultrasonic technique to measure a form of turbulence created in the flow. The fluid strikes a bluff body, imparting alternating vortices downstream of the bluff. Maximum flow ranges from 4200 gpm 15750 lpm temperature. Cx series coolpoint vortex shedding flowmeter installation and operation manual universal flow monitors, inc. If the arrangement is symmetrical the swirls will be shed from alternate sides of the obstruction. Vortex shedding flowmeter universal flow monitors pdf.
Industrial vortex flow meters suitable for flow rate or flow totalization measurements, industrial grade and for use with many fluid types. Vortex flowmeter flange card type vortex flowmeter tempersturepressure compensaton type vortex flowmeter inserted type vortex flowmeter sanitaryclamp type lugbtype 2 vortex flow sensor measuring the flow of liquid of steam,gas and low viscosity relationship. The frequency of the vortices is proportional to the flow velocity. A mass flow meter consisting of specially formed tubing that is oscillated at a right angle to the flowing mass of the fluid. The vibrating frequency of the vortex shedding is related to the velocity of the flow.
Port sizes available from 38 three eighths inches to 2 two inches in diameter. Interestingly the flow meter vortex shedding effect can be seen to occur in everyday life. Three vortex shedding cycles or 300 ms, whichever is greater. Vortex shedding flow meter and temperature transmitter shop now. Vortex shedding flow meter for low viscosity fluids starting at. Flanged card, triclamp, thread, flange, insertion, temperature and pressure compensation. In this flow, vortices are created at the back of the body and detach periodically from either side of the body. Higher backpressures are required at elevated temperatures and occasional surges to 125% of maximum flow. It is ideal for applications where low maintenance costs are important.
As shown in picture, in the meter body vertical insert a triangular prism root. These applications are found in most process industries, including rubber, steel, fabrication, manufacturing. The meter has no moving parts, and any potential for fluid contamination is eliminated by the corrosionresistant all plastic. Advanced predelivery programming and calibration is included, so. Vortex flow meters use an obstruction, known as a bluff body, in the flow stream to create downstream vortices which are alternately formed on either side of the bluff body. Flow meter resources flow meter application advisor. In a vortex flow meter, an obstruction in the flow path, often referred to as a shedder bar, serves as the bluff body. Vortex flow meters are flow sensors that detect the frequency of vortices shed by a bluff body placed in a flow stream. This flow meter vortex shedding phenomenon is true for both gases and liquids. The optimal pitch for vortex shedding is a 5d pitch 5 x the diameter of the stack. Utility vortex flow meter designed for general purpose, clean fluids and steam flow applications starting at. More specifically, proposed application examples have included tracking of a moving dipole, 35 flow sensor, 12, 3638 a vortex shedding flowmeter, 39 and a turbulent flow sensor.
The frequency of the vortices shedding is proportional to the fluid velocity. More specifically, proposed application examples have included tracking of a moving dipole, 35 flow sensor, 12, 3638 a vortexshedding flowmeter. The fv101 series can be used with nonviscous, clean, or dirty waterlike liquids that are compatible with brass, pvdf, and fkm. Oct, 2011 in selecting the size of all flowmeters, we want to get the normal flow into the center of the range. The maximum flow rate is governed by the meter pressure loss typically two velocity heads, the onset of cavitation with liquids, and sonic velocity flow choking with gases. These applications are found in most process industries, including rubber, steel, fabrication, manufacturing, refining, paper, chemical, food.
May 02, 2020 compact liquid flow meter without moving parts. Reducer vortex extends the measurable flow range, reduces installation costs, and minimizes project risk. Vortex flow meters are used to measure the flow of liquids andor gases and are best suited for turbulent flow with a reynolds number greater than 10,000. The shedding of these vortices due to the flow forms a vortex trail. Vortex flow meters operate under the vortex shedding principle, where an oscillating vortexes occur when a fluid such as water flow past a bluff as opposed to streamlined body. This creates a pressure on a sensor body containing a piezoelectric crystal. Vortex shedding flow meters are widely used for measuring the liquid flow rate in a single phase flow. As these vortices are shed from the bluff body, they create. The proper method of installing a halmi venturi meter 2 caution. Equation 3 also shows that the flow rate can be measured independently of the fluid pressure, temperature, density and viscosity.
Vortex shedding flow meter and temperature transmitter. Flow monitors plastic vortex shedding flow rate transmitters description the p420. What links here related changes upload file special pages permanent link page. Flow monitors vortex shedding flowmeter description this flowmeter is made for water, waterglycol coolant of low viscosity fluids. Plastic vortex meters cx series open email download. The meter minimum flow rate is established by a reynolds number of 10,000 to 10,500, the fluid density, and a minimum acceptable shedding frequency for the electronics.
As fluid moves across a vortex meter shedder bar, vortices form. The three wire version power supplied separate from the. Flow monitors vortex shedding flowmeter and temperature transmitter ct 142 inch flow and temperature transmitter maximum flow ranges from 4200 gpm 15750 lpm max pressure 300 psi 20 bar temperature range 32210f 299c flow temp coolpoint with rotatable enclosure viton is a registered trademark for dupont performance elastomers. A vortexshedding flowmeter based on ipmcs request pdf. Vortex flowmeters, also know as vortex shedding flowmeters or oscillatory flowmeters, measure the vibrations of the downstream vortexes caused by a barrier in the moving stream. When fluid flows around a cylindrical object, there is a range of. Options for a 0 to 5 vdc or a frequency output proportional to the volumetric flow rate are also available. These chimneys can be protected from this phenomenon. The rngrwgrwbg series vortex shedding flow meter family is designed to provide accurate and repeatable gas flow measurement. Dpf30 series two stage batch controllerratemeter shop now. Metering of fluids at high velocities with vortex shedding flowmeters. Titan discuss flow meter vortex shedding if you place an obstruction such as a bluff body in a fluid stream vortices will be formed downstream of the impediment. Vortex flow meters flow instrumentation badger meter. With builtin temperature compensation as a standard feature and optional integral pressure compensation, it is the first choice for saturated steam, superheated steam and compensated gas flow measurement.
Vortex flow meters have been appreciated by users as volume flow meters, which can, in principle, be applied to any flow measurement of liquid, gas, or steam. Volume flow measurement is enough for substances with small variations in density such as liquid. The piping system must create some backpressure on the meter to allow vortex formation and to prevent cavitation, especially at full flow. Our vortex flow meters offer added safety with a leakfree design and robust construction.
The frequency that the vortexes are shed depend on the size and shape of the body. Vortex shedding flow meter performance at high flow. The versaflow vortex shedding flow meter is a twowire design that is available in configurations for pipe line sizes from dn15 to dn100 12 to 4 in a wafer design and dn15 to dn300 12 to 12. In selecting the size of all flowmeters, we want to get the normal flow into the center of the range.
Emco engineering measurements companydro flow series of vortex flowmeters are designed specifically for flow water measurement. Meter installation the labeling of the flow direction on the meter should be aligned with the flow in the pipe. Therefore, your meter is oversized, as average flow is near the minimum detectable. A vortex flow meter works based on the principle of karman vortex street demonstrated in the below figure this principle essentially means that when an obstruction is placed in path of a flow, it can produce a series a vortices alternating from each side of the obstruction. The thermister is excellent sensing method when mounted on front face where very. Working principle of vortex flow meter instrumentationtools. User manual flow meters from badger meter, dynasonics. Flow measurement applications are very diverse and each. If liquids or condensate can be present in the flow, the meter should be installed so that liquids will not accumulate on the ultrasonic transducers the small buttons on either side of the vortex strut. The standard output is a two wire loop powered 420 ma current. Flow meter manuals, drawings, certifications, and other documents. Vortex shedding flow meter operating under the same principle of the vortex shedding measurement, this type of vortex flow meter is suitable for viscous,clean, or dirty waterlike liquids that are compatible with brass, pvdf, and fkm. Inserttype venturi flow meter installation and operation.
In fluid dynamics, vortex shedding is an oscillating flow that takes place when a fluid such as air or water flows past a bluff as opposed to streamlined body at certain velocities, depending on the size and shape of the body. However, compensations for temperature and pressure are necessary when measuring volumetric flow and mass flow rate in the reference standard state. The rvl series vortexshedding flow meter is a generalpurpose electronic liquid flow meter. Compact vortex flow meter without moving parts mass flow online. Browse online, or one of our applications engineers can help you choose the right product for your application. The rvl series vortex shedding flow meter is a generalpurpose electronic liquid flow meter. Add to mydirectindustry favorites requestbuttons catalog excerpts. Pdf design and development of 16 inch vortex flow meter with. Vortex shedding flowmeters vortex meter information formquestionnaire use this questionnaire to find the right vortex meter for your application. The frequency of alternating of these vortices is proportional to the flow rate being obstructed. For a vortex meter to work, you must have a minimum reynolds number of 10,000 coanda units go lower. Wolfgang uses a pendulum partially immersed in a makeshift flow tank to show us the effect of vortex shedding on a small object. Vortex shedding was one of the causes proposed for the failure of the original 1 a thrill ride, vertigo at cedar point in sandusky, ohio suffered vortex shedding during the winter of 2001, causing one of the three towers to collapse.
Thermal mass meter a mass flowmeter consisting of two rtd temperature probes and a heating element that measure the heat loss to the flowing mass. Minimum required backpressure is 10 psig at maximum flow and at 70 f 21 c. Vortex flowmeter is a flowmeter for measuring fluid flow rates in an enclosed conduit. The flapping of a flag is probably the most common example of this effect. Applications for liquid, dry gas, wet gas, wet steam, saturated steam and superheated steam. A flow meter is a device used to measure the flow rate or quantity of a gas or liquid moving through a pipe. Yokogawas classic vortex flow meter is sil approved, and sil 2 approval can be obtained with a dual meter design for redundant use.
These flow meters operate on the karman vortex principle and measure the flow velocity of liquids. Jun 22, 2012 wolfgang uses a pendulum partially immersed in a makeshift flow tank to show us the effect of vortex shedding on a small object. The flowmeter contains no moving parts for low maintenance and features a turndown ratio of at least 30. Compact vortex flow meter without moving parts mass flow. If the cylindrical structure is not mounted rigidly and the frequency of vortex shedding matches the chimneys constructed of thinwalled steel tube can be sufficiently flexible that, in air flow with a speed in the critical range, vortex shedding can drive the chimney into violent oscillations that can damage or destroy the chimney. Flow monitors vortex shedding flowmeter and temperature transmitter ct 142 inch flow and temperature transmitter maximum flow ranges from 4200 gpm 15750 lpm max pressure 300 psi 20 bar temperature range 32210f 299c flowtemp coolpoint with rotatable enclosure viton is a registered trademark for dupont performance elastomers. The flow meters ability to measure low viscosity liquids and volumetric flow rate makes it a great choice for water or condensate measurement. Vortexmaster fsv430, fsv450 vortex flowmeter abb group. An everyday example of a vortex shedding phenomenon is a flag waving in the breeze. Cpcnmed091412 1 universal flow monitors vortex shedding flowmeter cp 342 inch maximum flow ranges from 25200 gpm 95750 lpm max pressure 300 psi 20 bar.
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