How does this radial flow / static Bead / moving bed / all in one filter work ?
Does anyone have a drawing / or can guess the water flow course as it goes up and down through the various filters in this Dura-flow all in one radial flow filter ? Looks like the second radial flow which has holes in it might be double walled or are they just two slightly different diameter tubes with a basket overtop of them ? Looks interesting.
Radial flow is simply a change in water direction with an increase in pipe diameter (preferably at least 3 times wider) so the resultant drop in water velocity encourages sediment drop out. The water flow remains same (naturally) but water speed drops.
It's very easy for online armchair critics to disparage but
some issues I anticipate with that video version are:
* Having the transition to static K1 does not encorage sediment drop out unless the feed into static is well off the filter bottom. Fine particulate sedimentation needs slow quiet zones.
* The static K1 media will be hard to flush clean without some method of stirring.
* Hopefully there is a bottom drain to waste ability on each and every stage?
* Having a thin circular moving bed biofilm filter is much harder to tumble than a cylindrical chamber.
For a DIY version, you are best to isolate each stage in series for simplicity and ease of management - in my opinion. So a linear line of containers.
I imagine it works similarly to the DIY nexus filters I’ve just recently come across. I do like the convenience and form factor of an all in one but agree monitoring a filters performance might be more difficult to do compared to having a line of individual filters. https://www.koiphen.com/forums/showt...QT-(DIY-Nexus)
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