FILTERS & FILTER MEDIA
Filtration For All Applications
Available in many forms and guises, filters and filter media are without doubt one of the most important factors that make up an efficient water cleansing system. Thanks to improved technologies, which have increased performance, they’re also now the first place to start looking when it comes to combining effective water management and cost savings. We take a closer look at the available products in this competitive sector By Andrea Hartshorne
W
hen it comes to filters and filter media, there’s plenty of choice on offer and buyers can often be left confused as to the right
solution, but thankfully there’s a fantastic selection of suppliers on hand to offer advice and guidance.
Peter Hogg of Magnum Filters says: “Over the years I have heard many arguments for and against using cartridge filters for swimming pool filtration and which is the best filtering media to use in a cartridge. “Recently cartridge filtration for swimming pools has become more and more common especially in the USA and Australia. One of the main reasons is water conservation. Cartridges cannot be backwashed and have to be cleaned with a hose which takes far less water than the normal backwash.”
MAGNUM – CARTRIDGE FILTERS FOR POOLS AND SPAS
Magnum Filters, is a NZ company that has been manufacturing cartridge filters for pools and spas since 1982. Peter Hogg is the owner of Spaeuro which supplies the UK and European market with Magnum cartridge filters. With the advent of the large 400-600 square foot cluster cartridges such as the Pentair, Hayward and Astral units, the cleaning generally only has to take place once a year or even longer. This is because the surface area is so great and the flow going through the filters are so much slower than one stand-alone cartridge.
On a standard cartridge which uses Reemay fabric for its filtering media the nominal micron rating is around 30 microns. However after the cartridge has collected dirt and debris, a dirt cake forms on the outside of the fabric. This dirt cake can then become a further filtering mechanism which results in finer filtration. It is conceivable that the micron rating can go down to as low as 3-5 microns. With the added advantage of having
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a large surface area you end up with a very efficient filter unit which maintains adequate flow that requires very little maintenance. Pleated cartridges have been the filter of choice for spa pools for many years. The mistake a lot of spa manufacturers make is they demand a large surface area in a small cartridge. The obvious way to do this is manufacture a cartridge that has a large amount of pleats so they get that surface area. This results in the pleats crammed very close together so much so that the dirt and debris will not travel down the full depth of the pleat. This results in only a very small portion of the cartridge that is filtering and premature blockage is inevitable. It has been proved in tests and in the field that there is an optimum surface area on any given size of cartridge where the filtration was at its most efficient. A large spa company in Australia approached Magnum Filters and stated that their 50 square foot cartridges were blocking up very quickly.
AstralPool UK have a wide and varied range of high performance residential filters to suit most applications
This cartridge had 225 pleats on a 150mm diameter cartridge. After doing a series of factory tests with different size cartridges they ended up with the same size cartridge with 185 pleats. This cartridge worked far better and with regular cleaning lasted a lot longer than the previous model.
RESIDENTIAL AND COMMERCIAL FILTERS FROM ASTRALPOOL AstralPool UK have a wide and varied range of high performance residential filters to suit most applications. Their UK residential filters product range offers sand laminated filters, deep bed filters and bobbin wound filters and all their filters are produced in AstralPool UK factories based around Europe and are all part of the Fluidra Group.
Among the benefits that AstraPool UK are able to offer are competitive pricing, up to ten years’ warranty on the tank, which can vary depending on the model, in house technical support, exhaustive quality control in the factory and expert advice with difficult projects. All AstralPool UK filters come with the quality and service assurance that the trade demand and expect from a leading manufacturer. They have a wide and varied range of high performance commercial filters to suit most applications, including the new Artic and Artic Plus.
Filters start from a 1m bed depth through to 1.5m depending on the type and model and features both nozzle plate and collector arms. With all their filters produced in Fluidra Group’s own factories, a visual inspection can be carried out prior to delivery and a two year warranty is given on the vessel tank.
GOLDEN COAST’S EXCLUSIVE DARLLY RANGE
After 18 months as Britain’s exclusive distributor of Darlly filters, Golden Coast reports that things are going exceptionally well.
SPN December 2014 47
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