Burkert Valves > Burkert’s new “ideal” flow meter




Burkert have designed in all the characteristics that they thought would make a perfect flow meter.


The engineers at Burkert worked tirelessly to come up with a new selection of devices which are based on surface acoustic wave technology that allows the very precise measurement of liquid flow.


This article looks that the advantages of surface acoustic wave technology and application this will be advantageous to. 




On the market there is a massive choice of technologies that measure flow; all of them have both their disadvantages and advantages depending on the application that they are used in. Therefore several aspects need to be taken into consideration to make sure that the correct technology is chosen and it meets the requirements of the application.




However the research carried out by Burkert has lead to a huge development in flow meter technology. As Burkert are experts in flow technology they know that some existing technologies have limits in their use, therefore some potential weaknesses. Burkert also noticed that a lot of flow meter brands are well known in the market place and creating a product just like these will not bring any advantages to existing customers. Burkert created a list of features which would make the perfect flow meter, and found that there is not a product on the market that meets all of them. Burkert set about creating a part that would have as many of the ideal features that they could have, but at the same time avoid the compromises of the other designs. Burkert next step was to find a technology that could make up the foundation of a brand new product, one which could meet all of the needs but at the same time offer more advantages to the customer and the solution that met this was the surface acoustic wave technology.




A university worked with Burkert to find a solution for this and they came up with FLOWave which is a small and light solution for the measurement of liquid flow. FLOWave utilized the brand new surface acoustic wave technology to give a highly accurate measurement even in laminar or turbulent flow.




Surface acoustic wave technology utilizes wave propagation as in seismic activities. Inside the FLOWave sensors, the surface acoustic waves are moved on a pipe surface by piezo-electric interdigital transducer exclusively created by Burkert for this application. This is much like an optical waveguide, waves are sent on a zigzag path through the measured medium - in this instance the fluid in acoustic waveguide technology. The Rayleigh angle, from which the sound waves are decoupled from the surface of the tube and released out into the fluid, is unique for each propagation velocity of the waves. In conjunction with the temporal curves, the reception signal characteristics and depends upon if the signals went through the medium multiply or singly an acoustic fingerprint of the medium is created. Using these details, the volume flow rate, temperature and density, to ensure the mass rate can be discovered as additional information about the medium itself.




The radiation of the surface waves into the medium and the several reception of the signals create the flow profile, they are also shielded from interference. Since the process requires no parts inside the pipe, the diameter and subsequently the flow resistance remain unaffected. A huge advantage of inline flow measurement in fluids by means of surface acoustic wave technology is that there are no inner components or constrictions on the measuring tube states Burkert, within the tube might be created with the same surface quality as the remaining pipeline and its identical to different straight pipe section with regards to cleaning, flow conditions and hygiene. You will find no pressure declines with no effect of fluids on the sensor elements. The sole needed needs are the process conditions and the sensor size. FLOWave utilizes four or five of the interdigital transducers, which can be found externally on the measuring tube, making certain no direct contact with the liquid. Every transducer could act as a transmitter and a receiver. The complete time taken for the wave to travel from the transmitter to the receiver is dependent on the tube diameter and the type of liquid. The main difference between the wave propagation time as well as the forward and backward direction is proportionate to the flow. The analysis of all of the comparisons are set upon various criteria such as runtimes, amplitude and frequency, enabling assessment of the quality of the measurement, the presence of solids or gas bubbles, as well as the type of liquid. The advantages provided by surface acoustic wave technology has led to progression of Burkert unique brand new flow meter. The flow meter can measure volume flow along with other process values: they provide a huge measuring range in addition to measurement at high pressures, it's very precise and dependable; and the sensing element isn't in contact with the liquid-enabling use in hygiene-sensitive processes.




Also it could be set up in virtually any position.  Actually the brand new flow meter accomplishes every one of the qualities of the perfect flow meter Burkert FLOWave is small, and both the tube and housing is made from stainless steel .Currently it comes in  DN50,DN40,DN25 and DN15 pipe sizes, complete with clamp connections in conformity with many standards. Nominal pressures to a maximum of PN40 at first meet the most of the pressure stages that appear in applications. The surface acoustic wave technology inter digital transducer sensors are set parts of the measuring tube which are attached to the transmitter containing both the user interface as well as the required output signals. The transmitter is founded on Burkert new electronics platform- the productive device integration platform that was produced by the organization to open up the door to industry 4.0 for its goods.




There is an added benefit of the display being a single module which means that the meter can be used with or without this. When the display is utilized then it could be put beside or above the transmitter and can be rotated ninety degrees as well. The FLOWave transmitter has a 24VDC power supply. The electrical connections on the Burkert FLOWave transmitters are made up of two M20 cable glands; also they have a third gland which has an M12 plug. The device also has an output signal which have a single analogue output as well as a single digital output the third signal can therefore be changed between AO and DO through parameterisation.




Burkert FLOWave measuring system at the moment provides precise temperatures and flow information. At a later time, it will allow density measurement to be employed to determine the mass flow rate. Because of its design the flow meter can perform with a stagnant liquid meaning dependable flow figures are found for the smallest flow volumes. This technology enables quick flow changes dependably, rendering it perfect for fast filling processes.


Additionally, it has extra benefits i.e. system vibration on the plant, magnetic and electrical effects, and the conductivity of the liquid don't have any impact on the precision or reliability of the flow measurements completed by FLOWave. Since its first market launch, FLOWave is ideal for hygienic applications as well as the monitoring or measurement of water and other liquids. The purpose will be to lengthen the range over the small period to add greater selection applications. For instance, low conductivity water is usually utilized inside the pharmaceutical sector. Therefore, Burkert looked at what this industry needed. As it turns out consumers required something that provided a variety of features, including cleanability, light weight, compact size and a simple installation and an item that meets the standards. . There are standard needs for flow measurement in clean utilities the information must be ASME BPE 2012 part MM and FDA approved, the surface finish needs to be according to ASME BPE SF 1, it had to be drainable and cleanable according to ASME BPE SD installation must be according to C GMP, there must be no dead legs for example. During future development the technology will be extended too many more relevant applications. Burkert will continue to develop their goal of a multi-parameter unit that has high-end functionality & performance with a selection of functions to aid applications in a range of industries.


Applications in the long term are necessary in the hygienic industries, as well as the dairy related food production- breweries, chocolate and jam production as well as liquid differentiation. Later on, more industries and applications can take advantage from the usage of flow measurement completed utilizing surface acoustic wave technology.


Call us today for more information on Burkerts new range of flow meters or any product from the Burkert range of products.