Thread: Filtering

I prefer the nalgene myself. Whichever way make sure the receiver bottle is glass not plastic. When you filter I always get longer life out of my filter when the oil is still warm

I usually get ~200-250 mls before starts slowing down. I don't let it keep going to see how much it can do before it completely stops, I just swap it out. 250 ml is 25 vials. I usually don't make more than that at a time of each product anyway. I'm not a dealer but a do'er.

For small time guys I think the stericup filters are good, just use a hand pump and don't get the pressure over 8-9psi if I recall and it won't crack. I had some faulty ones before that leaked but they served me well early on before I upgraded. I didn't personally use the steritop or bottle top ones much, the ones that fit on a glass media bottle, but if you do remember that you have to autoclave and dry the bottle first (you can dry heat but it takes forever and can bake minerals to your glass if you don't use deionized water). So really I think the full disposable ones are good for a personal use brewer. Screw syringe filters unless you're only doing a reallyyy small amount, a couple vials maybe.

Also I believe the PVDF filters are always a bit cheaper than PTFE. Those are the ONLY materials I would use bro. The PTFE will flow a bit faster but PVDF is cheaper. I don't believe you need to double filter, as filters generally aren't cheap and not meant to be reused, also if you use any glass components they will need to be cleaned and resterilized. The second pass won't catch anything anyway, filters are rated in nominal or absolute, an absolute filter stops all particles below its micron rating. >45micron is generally regarded as safe, some rare prions can pass through a .45 but they were not even discovered until fairly recently from what I remember reading. Some places will regard .22um as the only true measure of sterility, but most I believe still accept .45um filtered solutions to be safely considered "sterile". They will also flow signifigantly faster and cost alot less than .22um filters. That is up to you to decide and research on your own. Using .22 filters in a syringe can be a pain, with a vacuum setup it is not really any slower and the filters for a glass filter are cheap in bulk. You can also use a glass filtration setup, but unless you are brewing on a small commercial scale I don't think its worth all the extra investment in time and money. I also believe for most guys using presterilized vials is the easiest way, unless you want to get into crimping and sterilizing your vials its not really worth the little bit of time and money saved, especially on small batches. Lastly I think if you have to buy raws in bulk you may as well brew it and bottle it all at once, it will store for a long time brewed and you know you will never have to make time and get supplies to brew again when you need it. You also will lose some % of your product in all your filtering and bottling and mixing processes etc. so making one large batch saves product, as well as alot of time on multiple brew cycles

You don't want to buy PES filters bro I don't think they will withstand the solvents. PVDF and PTFE are the only filter options you have usually as far as I know. There are quite a few materials that won't work and most are cheaper lol

Here is a compatibility chart for different materials, PES is not compatible with BA and there is "No Data" for BB

http://scientiis.com/laboratorium/ca...oratory/Filter Membrane Chemical Compatibility.pdf