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Backwash Description

Filtra-Systems STiR industrial water filter is the next generation of automatic back washable media filter.  It incorporates Filtra-Systems patented STiR fluidization technology which significantly improves filter performance when compared to older technologies like sand, anthracite and carbon media filters which do not completely fluidize the media during backwash and are susceptible to media fouling. The STiR filter fluidization technology has been validated in production and mathematically proven to clean 100% of the filter media during each backwash cycle.

STIR removes suspended solids and oil

STiR industrial water filter systems provide double the throughput efficiency of conventional sand filters or graded mixed media filters.  Under normal operating conditions, they remove 95% to 99% of suspended solids and 90% to 99% of insoluble hydrocarbons, without the use if chemicals.

Overview:

As contaminants are captured, and flow is restricted, a vacuum pressure builds.  Once the vacuum pressure reaches it’s designated set point, the regeneration cycle is automatically triggered, and the media is cleaned, and the contaminants are then removed.  This process is verified via the visual indicating media bed sight glass, located on each unit, and return of the vacuum pressure to it’s clean bed set point of 0.     

Once proper vacuum pressure is reached, the filter begins the patented media cleaning/regeneration process.  All flow is eliminated and the agitator becomes energized to completely stir the tank.  The philosophy being that all of the filter media, and contaminants captured, become a homogeneous mixed slurry in the filter tank.  Once mixed, process water is allowed to enter via the filter inlet, while the pump pulls the liquid, containing all of the contaminants, out through the backwash exit port.  The filter media is retained in the filter during this cycle by the backwash screen, as contaminated water flows though, and is sent to upstream processing or to waste handling.  

Engineered and supported to meet your needs.

Single filtration units are able to process 50 to 6,500 gpm each, depending on the application.  Units are pre-assembled at the factory and shipped to the site, skid mounted, ready for installation.  Units having a diameter greater than 20’ have filtration tanks designed in easily shipped and site assembled sections, to minimize freight and installation costs, while maximizing single unit throughput.