The filter cartridge does it!
For me, I wanted to use a universal and portable filter for particles from 5 μm and exactly there is unfortunately (almost) nothing for the water cooling area. So you have to take action yourself. But one thing I have to say first: Something like this is only suitable if you always use the same coolant! The filter is huge and devours inside including fully soaked filter candle already almost a liter Coolant! As long as I don’t have to change the candle, the contents are airtight anyway after the filtering process due to the quick-release fasteners, and the coolant simply stays inside as long as the filter is not yet contaminated. So you don’t have the loss every time.
I bought a professional water filter for the project, which can also be used in the food sector. BPA-free plastic, an impact-resistant PP container and candles as 10 or 5-μm inserts. The disadvantage of this industrial solution is the connection with 1″, which of course does not fit the usual 1/4″ threads. Here you first buy a reducing nipple from 1″ to 1/2″ male thread. Next, you need a reducer sleeve from 1/2″ female to 1/4″ female. The o-rings work for 1/2″ and 1/4″ in the female threads, but for the 1″ connection it does not work that way.
There are no external O-rings (yes, how could there be), so you would have to use hemp and paste. Or you can rely on viscous and well adhesive plasticine from the plumbing and sanitary sector. This kneadable and malleable compound is always used when there are no suitable seals or rings or when flexibility is required. I’ve been using “Plastic Fermit” for years, a nice tool that a plumber once recommended to me.
I also use the Fermit when transitioning to 1/2″, although I even put in two matching o-rings. You simply feel safer when the flow rate is already at 500 l/h and the pressure could really let off steam, especially at the inlet.
By the way, once assembled, the filter looks like the picture below. I have (for purely optical and haptic reasons) also squeezed on the Fermit once again O-rings. The stuff sticks to your fingers, and it’s not something the annoyed housewife wants to wash out of a pair of pants later. Because that gives stains.
And now: Water march! I actually only do such actions in the bathroom of the laboratory. Better safe than sorry, because the flow rates are enormous and you can’t always stand next to it for hours either. Well, to be on the safe side, the chiller switches off when the water is completely out, but then you have already emptied a full bucket into the environment. It’s not something you really have to have.
With such a filter, you can save and recycle your expensive Coolant, as long as it is only suspended particles and plasticizer residues that have materialized with something else to form slime patties. This saves immensely and you can work at least three times longer with one charge of Coolant. The candle due for this costs about 9 euros and can easily also three rinses from, before it is better to change it times. And now do the math yourself… From that point of view, I don’t have to be afraid of crappy nickel plating and dirty radiators anymore. Flush once and it’s good to go.
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