Cartridge filters (incorporating bag filters and strainers) are filter systems used for the removal of particulate matter or certain minerals from water supplies.
Unlike sand filters, multimedia sand filters or activated carbon filters, cartridge filters do not generally have a backwashable filter medium, although certain strainers can be cleaned and re-used. This usually means that the operating costs of cartridge filters are higher than those of media filters.
Cartridge filters do however have certain benefits over media filters, e.g.:
- Cartridge filters can remove smaller particles, with filtration down to below 0,5 microns available on most systems.
- Capital cost of cartridge filters is usually lower than that of media filters.
- Cartridge filters are very economical at lower flow rates.
- Cartridge filters take up less space than conventional media filters.
Cartridge Filter options
Cartridge filter housings can hold the following types of cartridge:
- Sediment removal cartridges
- Washable strainers
- Granular activated carbon cartridges
- Activated carbon block cartridges
- Water softening resin
- Deionization resin
- Scale removal crystals
- pH adjustment crystals
- Filtration, disinfection and taste & odour removal filter candles (see our residential water filter section for more information on filter candles and their uses)
Cartridge Filter Specifications
| Model | Maximum flow per hour* | Operating pressure | Construction |
|---|---|---|---|
| LT-10 | 600 lph | 200-600 kPa | Polycarbonate |
| LT-20 | 1200 lph | 200-600 kPa | Polycarbonate |
| BB-10 | 1500 lph | 200-600 kPa | Polycarbonate |
| BB-20 | 3000 lph | 200-600 kPa | Polycarbonate |
| SS-710 | 4200 lph | 200-1000 kPa | Stainless Steel |
| SS-720 | 8400 lph | 200-1000 kPa | Stainless Steel |
| SS-730 | 12600 lph | 200-1000 kPa | Stainless Steel |
*Maximum flow rate is based on low turbidity feed (less than 5 NTU), feed pressure of 300 kPa and the use of a 5-micron nominally rated woven sediment cartridge.
Bag Filter Specifications
| Model | Maximum flow per hour* | Operating pressure | Construction |
|---|---|---|---|
| 1BS-01 | 10 000 lph | 200-1000 kPa | Stainless Steel |
| 1BS-02 | 20 000 lph | 200-1000 kPa | Stainless Steel |
*Maximum flow rate is based on low turbidity feed (less than 5 NTU), feed pressure of 300 kPa and the use of a 5-micron nominally rated woven sediment cartridge.
Self-cleaning Strainer Specifications
CWC offers a range of strainers with the choice between manual, semi-automatic or automatic backwash controls.
| Model | Maximum flow per hour* | Operating pressure | Operation |
|---|---|---|---|
| IL-M20 | 1000 lph | 100-1000 kPa | Manual |
| IL-M25 | 2000 lph | 100-1000 kPa | Manual |
| IL-M40 | 10000 lph | 100-1000 kPa | Manual |
| IL-M50 | 30000 lph | 100-1000 kPa | semi-automatic/automatic |
| IL-M75 | 50000 lph | 100-1000 kPa | semi-automatic/automatic |
| IL-M100 | 80000 lph | 100-1000 kPa | semi-automatic/automatic |
*Maximum flow rate is based on feed pressure of 300 kPa and the use of a 50-micron strainer.
Design Considerations.
In order to accurately size a cartridge filter for your residential, commercial or industrial application, we will need to know the following:
- The amount of water you expect to use per 24-hour period.
- Your peak water demand.
- Operating hours per day.
- Your water pressure.
- The amount of suspended solids in your water. See our water analysis section for more information.
- What you plan to use the filtered water for.
Your local approved CWC distributor can help you calculate your filtered water needs, and can arrange for a professional water analysis to be taken. For more information about cartridge filters, bag filters or strainers and how the water filtration process can help you in your home or business, contact CWC today