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Backwashing Automatic System

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There are many reasons to use our Auto-duplexes or Automatic Backwashing Systems.

  • Reduce process/system downtime
  • Reduce operator exposure
  • Reduce maintenance 
  • Reduce labor 
  • Reduce filter element disposal and replacement cost
  • Increases productivity

Self-cleaning filters represent the ideal situation and provide the most productive and labor free solution. Rosedale Products' ABW is unique because our patented technology backwashes with a very low volume of liquid. This is achieved by using air pressure  to create the shear velocity needed to effectively clean the filter element.

Flexible and Versatile
Flow rates from less than a hundred to several thousand GPM can be accommodated. Also, to meet footprint or space requirements, we can configure the systems as needed. Removal ratings from 5 micron and larger are available in a variety of filter media including standard bags, wire cloth and wedgewire. Continuous flow is maintained by taking  one station at a time off-line for cleaning - the rest of the housings continue filtering.

Turnkey Systems
Our systems have included air compressors, pumps, power distribution boxes, motor starters, climate controlled enclosures, heat trace and air dryers, all skid mounted and ready for installation.

How It Works
Fluid is introduced through the bottom of the filter housing. It is then forced through a filter element where the contaminant is captured on the outside surfaces of the filter. The clean fluid exits through the outlet. A controller monitors the differential pressure across the filter. When enough contaminant collects on the element and the differential pressure reaches a pre-selected point (^P), the backwash sequence is initiated. The backwash is accomplished by automatically shocking the filter with air or gas which lasts approximately 10 seconds. There is no introduction of additional fluids to contaminate the process, and the volume of liquid discharged is held to a minimum, reducing disposal costs. When the backwash operation is completed, the system returns on-line, the controller resets itself, and the whole process begins again.