Flow, level & control

OPTIMASS 6400 fit into the existing space available without major piping modifications, while other vendors’ meters would require significant piping modifications. With the OPTIMASS 6400, a proprietary

isolation system allows for the meters to be close coupled or mounted flange to flange. The unique design ensures that tube vibration has no effect on performance when meters are flange to flange mounted. The meters have an oscillator that moves the pipe, causing fluids to swirl, which creates a mechanical distortion between the pipe’s inlet and outlet. The sensor upstream of the oscillator picks up this vibration before the outlet. With other designs, tube vibrations migrate through the piping, causing errors if the meters are close coupled. In addition, for the same pressure drop,

BASF was able to select a smaller diameter because of the lower pressure drop through the meter compared to other options. This was a real cost advantage to the customer. One other benefit BASF noted was optimising the stocking of spare parts ensuring that all meters received have the required entrained gas capability. “We got excellent support from KROHNE

and were able to get two meters which allowed us to stay under our approved budget,” explains Daniel Siddiqui.

in-situ verificAtion reduces down time due to cAlibrAtion requirements Safety instruments meters must be calibrated regularly, and operators are required to establish a proof test interval. Using the OPTICHECK on-site verification tool, BASF can fulfill third party requirements for independent verification of instruments. They connect the tool in-line on-site to gather measuring data to ensure that the flow meter is performing within ±1 per cent of the factory calibration. The baseline can be historic repair data from the factory or on-site test results after performing a full verification. OPTICHECK also provides detailed reports for proof test documentation of safety loops. The in-situ verification enables the operators

to keep the meter operating longer, rather than having to pull the meter out of line, package it, send it off to get calibrated to a known standard, and then shipping it back and installing it.

meter performing well since stArtup Plant operators started up the new Coriolis meter technology for the SIS in February 2020. According to Siddiqui, the system has been operating well, providing accurate readings and offering increased confidence in the SIS application. “By using the KROHNE meters we did not compromise safety, and we were able to maximise cost efficiencies while receiving free startup support,” says Siddiqui.

KROHNE Instrumentation Monthly April 2021

ImprovIng growth and storage of bulk crops


ygiene and the elimination of pests and fungus is a major problem when it comes to the growth and

storage of bulk crops in modern agriculture. From the preparation of the buildings used for food production to the silos containing the mass storage of products, cleanliness is essential in ensuring the quality of the produce. Applying certain chemicals extends the life of the produce, even when produce is being put into storage.

A system for ‘fogging’ crop storAge spAces Agrochemical specialists, Stored Crop Conservation Limited (SCCL), have created a system of ‘fogging’ crop storage spaces with a very fine mist which guarantees the whole volume is coated with the appropriate chemical. Over time, by developing its own equipment

and methods, SCCL figured out a way to get a much more even treatment than conventional methods. The chemicals used are often regulated substances, and careful control of the application volume is absolutely critical. Since SCCL knows how essential the chemical

dispersal process is, for nearly 15 years the company has used Titan Enterprises flow meters to record the amount of chemical used.

A pedigree in AgrochemicAl flow meAsurement Titan Enterprises has been involved with agrochemical flow measurement since back in the early 1970s. Having been involved in developing flow

metering solutions for that same industry on and off since then, Titan has a simple answer when asked why their flow meters work so well in the crop conservation business. The use and deposition of powerful

agrochemicals is critical for a safe and effective spread. Metering the actual volume used against a known enclosed volume (a building), or a known acreage (a field), is vital. Historically, users would have to check what they used after it had been sprayed or dispersed and not during the process.

hAndling Aggressive chemicAls Problems that arise to accurately record the volume of dispensed chemicals that protect crops include that many of the fluids are extremely aggressive and the volumes dispensed can often be quite small. This requires a combination of chemically resistant flow meter design and low flow rates to ensure precision – both areas where Titan have considerable expertise.

todAy’s solution On current generation SCCL machines, the volume of dispensed chemicals is recorded using Titan 900 series mini-turbine flow meters. These flow meters are coupled to a panel indicator recording total volume throughput on a re-settable display. Titan’s 900 series mini-turbine flow meter

is a very compact meter manufactured in 316 stainless steel and PVDF with Viton seals. Not only can the 900 series satisfy the flow and chemical resistance parameters, it is easy to install in a cabinet. The panel indicator gives the machine

operator the ability to check the desired dosage for an area against the actual volume of chemical used thereby ensuring safe dispersal of the controlled chemicals. In addition, SCCL’s in-house calibration rigs utilise Titan’s highly accurate oval gear (OG) flow meters to make sure consistent, reliable measurements always take place.

conclusion Many of the chemicals SCCL uses are controlled substances, meaning recording their application is important to the company’s quality guarantees. For some time, Titan re- calibrated SCCL’s meters every year, but they wanted to bring this facility in house, so a transfer standard flow meter appeared to be an ideal solution. Now, Titan certifies that meter once a year and SCCL calibrate their other Titan Enterprises flow meters in-house, saving down time and money in the process. Titan’s oval gear meters are positive displacement devices where a swept volume of fluid is passed with each rotation of the gear. They are very efficient as the pressure imbalance across the chamber that drives the gear is high, even at low flows. The clearances around the gears are tight, giving good accuracy, and making them ideal for this type of transfer calibration.

Titan Enterprises 37

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