A Side Stream filtration system is designed to treat 5 – 15% of the main water circuit flow, to remove both suspended solids and the chemically treated biomass. A typical system would consist of an Amazon Stainless Steel 61 Series filter housing containing disposable Amazon SupaSpun II filter cartridges.

SupaSpun II filters are available in a range of absolute micron ratings so the removal efficiency can be adjusted to achieve a progressive clean up of the recirculating water. Typically a 20 µm rate filter is used for the initial clean up. Once this is achieved a finer filter can be used e.g.10 µm absolute. We recommend the use of absolute rated filters as unlike nominal filters they maintain their removal efficiency for contaminants throughout the lifetime of the filter, even under varying water quality conditions. It is typical for nominal filters to suffer reduced removal efficiency or to unload previously retained contaminants after a period of use and this will cause unexpected system fouling.

Side Stream filters are typically installed inside in the Building Plant Room. For ease of operation, a variety of operator friendly accessories are fitted to the vessels to make installation, operation and filter change-out as simple as possible. These include drain valves, pressure gauges, flow controllers and vent valves. On certain applications with high iron content, Rare Earth Ferrostik magnetic assemblies for removal of iron based contaminants. An automatic vent valve can also be incorporated on the filter housing to help eliminate trapped air from the system.

Installation recommendations are available from Amazon Filters. Normally if there is at least 2 barg positive pressure, they are installed on the positive side of the system pumps. The outlet pipe work of the filter should be connected to the suction side of the pump. Where the feed pressure is less than 2 bar the filters are installed in separate loop systems serviced by an independent booster pump.

Benefits of Installing Amazon’s Side Stream Filtration Systems

  • Protection of automated valving from fouling to ensure effective building temperature control is maintained
  • Removal of suspended solids to reduce abrasive wear and tear on process plant.
  • Removal of chemically treated biomass to further reduce pipework degradation.
  • Separation of entrapped air from closed loop systems.
  • Reduced time and lower labour costs when compared to a conventional flushing regime.
  • Reduced maintenance, equipment down time and repair costs.

Chilled Water System Diagaram