FILTERS & FILTER MEDIA
glass and processed to provide a hydraulically optimised media in terms of particle shape and size distribution, the glass is then placed under an activation process which increases the surface area by 300 times over that of crushed glass or sand. The high surface area is negatively charged so absorbs organics and small particles. The surface also has permanent metal oxide catalysts giving a high redox potential and making AFM®
self-sterilising so there is
no channelling. Disinfection by-products are reduced by 90% and arsenic, iron and manganese are controlled. Operating costs are greatly reduced by up to 30%. The media never needs to be changed and will last the life of the filter. AFM®
is the only activated
glass filter media and gives 50% better performance than sand or crushed glass, ensuring reduced turbidity and providing crystal clear polished water. AFM®
is
certified under Regulation 31 in the UK and International NSF61.
NOT ALL CARTRIDGE FILTERS ARE THE SAME
There is nothing more important for a pool or spa than the quality and clarity of the water. Whether or not this can be achieved will depend on the quality of the filtration system. The effectiveness of a modern filter cartridge depends on a few key components: the core, the end caps, bands and most importantly the filtration media.
Darlly filter cartridges are distributed by Darlly Europe in Europe, Middle East and Africa and by Golden Coast in the UK. As one of the world’s biggest manufacturers of replacement filter cartridges, Darlly advise that there are cheaper alternative filter cartridges on the market that should be avoided as they can and do damage vital components of the spa. Substandard filter fabric means a substandard filter cartridge. One that clogs quicker requires more frequent cleaning and creates inferior water conditions and often causes the pleats to collapse. The
end results are that the filter cartridge needs replacing more frequently and the circulation pump will become damaged from lack of flow. Indeed, 60% of all spa service call-outs are as a result of a clogged filter which has caused damage to the pump.
Darlly Filter cartridges, are well accepted and appraised globally along with other well-known filter cartridge manufacturers including Unicel, Filbur and Magnum which all use Reemay®
.
Darlly Europe go on to say: “One way that Reemay®
filtration fabric delivers
performance is with its unique Trilobal fibres which give a high surface area. Reemay®
uses
Trilobal fibres in its pool and spa filtration fabric which deliver 45% more fibre surface area than the round fibre that lower quality fabric use, at the same basis weight. The unique shape also promotes a more turbulent flow or ‘tortuous path’. This causes particles to deposit within the media delivering increased efficiency without the pressure
CASE STUDY: The Case For Glass Filtration Is Clear-cut! Keen to implement a number of green
technologies that would help reduce the energy burden of their pools on the environment, increase the water quality
and control, and help to ensure sustainable swimming facilities for the future, West Oxfordshire District Council turned to the expertise of Certikin.
Having achieved great results from the installation of glass filtration media in the busy Windrush Leisure Centre, Witney, the Council took the decision to repeat the winning formula at Carterton, with equally stunning results. Stuart Wilson, Leisure Development Officer for the District Council, said: “I am delighted to report that the results have been fantastic. The installation of glass filter media formed a key part of a major overhaul of each of the swimming pool filtration systems and the plant
46 December 2013 SPN
rooms have been completely transformed, giving us safer spaces to work in with the operating procedures of the plant becoming easier and greener. The system has helped to make the swimming pool water consumption more economical, as we now require fewer backwashes whilst maintaining water quality. For instance, the Windrush has seen a 50% reduction in the frequency of backwashes, whilst maintaining safe pool water, since the upgrade of the plant room. The new system has helped prevent heat loss through filters, closure of the pools through single filter failure and has eliminated the need for regular removal of ‘worn’ sand to landfill. The water quality has also been greatly improved.”
www.swimmingpoolnews.co.uk
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