Filter monitoring is a core task of differential pressure gauges ? the differential pressure increases as soon as the filter becomes clogged. The measuring instruments thus signal once the filter has to be cleaned or replaced. The efficiency of this type of solution could be illustrated by the exemplory case of WIKA pressure gauges of the DELTA-line series in water treatment.
With microswitch and operating display ? the WIKA model DPGS40 differential pressure gauge enables safe filter monitoring.
In the water industry, reverse osmosis is a widely used process to split up water from unwanted substances. Freedom work with semi-permeable membranes.
For filter monitoring, a global solution provider for the treatment of drinking, industrial and wastewater uses WIKA model DPGS40 differential pressure gauges in its plants in Germany. The instrument measures the pressure on both sides of the membrane.
Timely intervention at the filter
As well as the on-site display of the differential pressure, the pressure gauge has an integrated microswitch. This sends a warning signal to the control centre whenever a defined limit value is reached. This permits the operator to set up for timely cleaning or replacement of the filter. Due to its mechanical measuring principle, the filter monitoring also functions reliably in the event of a power failure.
Continuous monitoring
Prompt intervention at the filter is necessary for just two reasons. Firstly: It prevents possible contamination of the water. Secondly: The operator saves energy with the aid of continuous filter monitoring. The more fouled a filter is, the harder the pump must work for the required media flow.
Integrated working pressure indication
The customer chose the DELTA-line pressure gauge for filter monitoring for another reason ? due to integrated working pressure indication. These details is important to the plant manager because it allows him to draw conclusions concerning the respective pump performance. To obtain this information minus the two-in-one solution, he’d otherwise have had to create an additional measuring location.
Further measuring requirements
In addition to filter monitoring, the differential pressure gauges of the DELTA-line series are ideal for tasks in level and flow measurement. In different versions, they cover an array of applications. DPGx instruments can be found with analogue signal output or more to two microswitches. All have ATEX approval. There is also a variant with SIL certification and DNV-GL approval for marine applications.
Note
An overview of most instruments in the DELTA-line series can be found in our flyer. Further technical information on the products can be found in the pressure gauge and contact pressure gauge products on the WIKA website. In case you have any questions, your contact will gladly help you.
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Filter monitoring: An essential component for energy-efficient operation