The Filtra Systems STiR filter is the next generation of automatic backwashable deep bed filter, which has overcome the limitations of conventional sand and anthracite filtration systems.

The filter has been selected as the best available technology in many water filtration applications, and has been utilized to remove oil and grease, as well as suspend solids from a variety of waste water streams.  

The Significant benefits include:

• High Removal Efficiency - 95-98% suspended solids removal and 90-95% insoluble oil removal efficiencies are obtained.
• Atmospheric Tank – The unit has an atmospheric tank in lieu of a pressure vessel, which minimizes cost. 
• Compact Design - The filtration units are skid-mounted for ease of installation and come complete with all the required components for automatic operation.
• Unique Backwash Concept – By using the kinetic model of a CSTiR we can mathematically prove that the contaminants are removed during each backwash.  No other technology can guarantee this.
• Filter Media - The black walnut shell media is a “green”, sustainable material (as it is not mined), chemically inert, hard, resilient and preferentially water wetted. 
• Throughput Efficiency - Higher flow-rates and short/efficient backwash cycles mean less than ½ % of the daily throughput is waste. 
• No Auxiliary Backwash Equipment - Process water used for backwash supply water, therefore separate clean water sources, storage facilities or other ancillary equipment is not required.
• Minimum Backwash Volume - The STiR Deep Bed filter uses the least amount of backwash volume of any deep bed filter.
• Media Replacement - Under normal operation no regular media replacement is required (typical media life is 30 years, with 2-5% attrition).
• No Chemical Consumption - Normal operation requires no chemicals for filtering and no surfactants or additives for back washing.
• Range of Sizes - Single unit capacities range from 3,600 bpd (24 m3/h) (50 gpm) to 250,000 bpd (1,660 m3/h) (7300 gpm).