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Thread: Hydrophobic filters
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05-01-2019, 11:26 PM #1
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Hydrophobic filters
I found a 10 pack of sterile pvdf syringe filters for 15 bucks. No mention in the posting about hydrophillic or phobic-ness.
I got them and they are hydrophobic.
Are they useless?Presser liked this post
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05-02-2019, 04:57 AM #2
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Saw it mentioned somewhere the hydrophobic could be wet with a solvent first. .
Perhaps I should leave out a few ML of BB from the mix when I prefilter with the .45, then when final filtering with the hydrophobic .22, put those reserved BB ML's through first followed by the pre-filtered mix
Perhaps I wont need to do that. Perhaps my test ace and test prop will crash with a few ML of BB in the prefilter process?
I am going to use half EO, mayeb some pure EO will wet the hydrophobic filter and let it flow. Not sure if I am using EO, going to do a test injection with it to see if I tolerate it.
I have only brewed once before so any insights are appreciated. ThanksPresser liked this post
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05-02-2019, 05:04 AM #3
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05-12-2019, 05:32 PM #4
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05-25-2019, 07:41 PM #5
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I tested straight prefiltered GSO with the hydrophobic .22 pvfd and it was smooth with a 3mm syringe. At first it seemed like maybe it was locked up, but I flipped it upside down and squeezed the airbubbles from the syringe through and it flowed after that. I expect 10mm to be a little harder cause "hydraulic leverage" (increased surface area of the inside of the 10mm cylinder vs the same size hole), but the hydrophobia doesnt seem to be a problem.