Cartridge Filters & Housings
These cartridges are of a pure polypropylene construction, using FDA approved materials, which meet NSF Standard 58, with the manufacturing process being ISO 9000 certified. More importantly, in the UK, Osmonics Spun-Bonded are WRC listed.
The one-step manufacturing patented process employed by Osmonics continuously extrudes and thermally bonds pure polypropylene micro-fibres into a complex filter matrix. Micro-filaments plus precise control maximise the positive filtration characteristics of graded density, tight micron cut-offs and maximum void area with millions of tortuous paths. This manufacturing process assures consistent quality, filter-to-filter, year-in and year-out.
True Depth Filtration
Many cartridges claim to be depth filters but to be a true depth filter a cartridge must be able to retain contaminants throughout the entire cross section of the filter. The complete Osmonics Spun-Bonded range are true depth filters, hence higher dirty holding capacity resulting in improved life.
Fileder’s most popular cartridge meets the requirements of most non-critical applications as well as serving as an economic pre-filter. Purtrex is the latest Osmonics’ development to use their patented blown microfibre technology. This range of pure polypropylene, surfactant-free depth filters, with exceptional dirt-holding capabilities, has become the next-generation replacement product to string-wound and wrongly-specified resin-bonded cartridges. The result is exceptional value for general applications where long-life, high-purity and low change-out frequency are required.
The Osmonics’ Hytrex II cartridge is recognised in industry throughout the world as the original spun-bonded filter. Having evolved over the years as technology allows, Hytrex II offers clear advantages over Purtrex in certain applications, with 20% more polypropylene, which creates a longer and cleaner manufacturing process and provides 15% greater efficiency. As an indication of this ionic cleanliness, rinsing to 18 megohm is achieved in under 12 minutes, approximately half the time of Purtrex (note – standard string-wound and resin-bonded cartridges cannot reach this standard). Hytrex II also has obvious benefits with its packaging – including clear-case identification and each element being embossed with its code – reducing the risk of installation error.
Selex is the most technically advanced spun-bonded filter cartridge manufactured by Osmonics. For critical filtration applications that require greater particle selectivity, Selex uses microfibre up to 70% smaller than was previously possible. The result is a highly-efficient (99%+) long-life cartridge with a sharp cut-off for process applications requiring clarifying separation. Selex’s cleanliness is the best of the spun-bonded trio, with an 18 megohm/cm water stream returning to 18 megohm/cm in under 4 minutes, having passed through a new filter. Selex is, like Hytrex II, embossed with its product code.