In process industries, a wide variety of processes can be monitored using pressure gauges and pressure transmitters. However, when the media to be measured are abrasive, these measuring instruments rapidly wear out needing to be replaced at short intervals. This in turn results in high maintenance and replacement part costs.
For example, sandy or powdery process media and mixtures containing solids act on the measuring instruments like emery paper, abrading their connections or destroying their sensitive diaphragms.
WIKA now offers pressure measuring instruments mounted in combination with diaphragm seals that are coated with 'wikaramic' in order to resist the abrasion. The coated flush diaphragm seals have a high abrasion resistance and thus protect the sensitive diaphragm from scouring and prevent them being worn down quickly. The process pressure is transmitted to an hydraulic fluid via the flexible diaphragm, and from there to the sensor itself or the mechanical pressure gauge. In this way, the pressure can be reliably measured, even with abrasive, powdery media or mixtures containing solids.
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A water treatment system for a major metropolitan area in the Midwestern United States demands careful monitoring and management of processes across its sprawling network. Choosing VEGA for its process automation needs meant more than just obtaining precise and reliable pressure sensors.
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