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    Swimming Pool Filtration

    Are you still using filters with 150-year-old technology or are you ready for the next generation of water filtration?


    Crystar® FT Ceramic Membrane Filters

    Some types of swimming pool filters have been using technology developed more than a century ago. Saint-Gobain introduces silicon carbide filter membranes for the next generation of water filtration for swimming pools.

    Crystar® FT ceramic membrane filters consist completely of re-crystallized silicon carbide and are developed to resist even extreme mechanical, thermal and chemical stress.

    Crystar® FT Ceramic Membrane Filters

     

    DOWNLOAD BROCHURE


    Crystar® FT ceramic membrane filters consist completely of re-crystallized silicon carbide and are developed to resist even extreme mechanical, thermal and chemical stress. 

    Crystar® FT ceramic membrane filters have a dead-end design. The filters consist of a multitude of parallel channels that are alternately closed. The water enters through the inlet channels, is filtered by a membrane with fine pores, passes through the wall of the channel, and leaves the filter through the outlet channels.

    Unlike traditional sand filters that have been in use for nearly 150 years, Crystar® FT ceramic membrane filters offer low water consumption and provide with their 250nm pore size a physical barrier for bacteria and other micro-organisms. The combination of microfiltration, chlorination and UV treatment results in amazing water quality. Additionally, significantly fewer produced chlorine byproducts reduce the odor associated with indoor pools. 

    Due to its high filtration area, filtration systems with Crystar® FT ceramic membrane filters require small footprints. They fit easier into existing technical rooms, which can avoid high reconstruction costs. In new swimming pool construction, technical rooms could be smaller, also resulting in cost savings. 

    Water Treatment Video

    Play the video for a demonstration on how Crystar® FT ceramic membrane filters improve the water quality in swimming pools.

     

    Features and Benefits

    The use of Crystar® FT Filters ensures the following benefits:


    • high efficiency
    • physical barrier for bacteria and micro-organisms
    • excellent chemical robustness
    • long service life
    • effective disinfection
    • high flux
    • reduced chlorine consumption
    • simple cleaning
    • no pH restriction
    • low operating costs
    • compact design
     

     

    An important feature of Crystar® FT Ceramic Membrane Filters for the preparation of pool water in public pools is their ability to be cleaned even under extreme chemical conditions (eg. at pH 0.5 and pH 13.5). After such cleaning, the filters are practically in "as delivered"-state, again. If the filtration system design supports this, the filters can remain mounted in the system for the chemical cleaning and are ready for filtration immediately afterwards (CIP = "Clean in Place"). Due to the outstanding material properties of silicon carbide, the chemical cleaning can be repeated as often as required to ensure long service time.

    Specifications

    Specifications


    Material Properties of Crystar® FT (carrier)
    SiC - contents ≥ 99%
    Chemical stability 0 to 14 pH
    Porosity (typ.) 40%
    Thermal expansion coefficient (20° - 1100°C) 4.8 K-1*10-6
    Pore size (typ.) 5 micron
    Active filter area (148 x 148 mm2, L = 1000 mm) 11 m2
    Weight (148 x 148 x 1000 mm3) (typ.) 20 kg
    Material Properties of Crystar® FT (membrane)
    SiC - contents ≥ 99%
    Chemical stability 0 to 14 pH
    Porosity (typ.) 40%
    Thermal expansion coefficient (20° - 1100°C) 4.8 K-1*10-6
    Pore size (typ.) 250 nm
    Typical Operating Parameters
    Trans membrane pressure (typ.) < 600 mbar
    Backwash pressure (typ.) 2 bar

    Related Resources

     Crystar® HiFlo Ceramic Membrane Filters for Leisure Pools (Case Study)
     Crystar® FT Ceramic Membrane Filters for Recreational Water (Brochure)
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