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#4443145 - 06/27/17 08:14 PM Acid filter fail
T-Bone Offline


Registered: 12/04/04
Posts: 112
Loc: Beaverton, OR USA
I had some pleated acid filters fail over the weekend.




This is what happens when you put a polypropylene filter in a chemical (hydrochloric acid at 60 C) that should have had a PTFE filter. The polypropylene was crumbling, the filter o-rings and end cap blew off entirely. The pleated media was totally destroyed. Fun!

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#4443231 - 06/27/17 09:46 PM Re: Acid filter fail [Re: T-Bone]
CT8 Offline


Registered: 10/09/14
Posts: 10979
Loc: Idaho
What were the filters used for? Lab? MFG ?
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#4443361 - 06/28/17 01:05 AM Re: Acid filter fail [Re: T-Bone]
T-Bone Offline


Registered: 12/04/04
Posts: 112
Loc: Beaverton, OR USA
These are from an acid cleaning manufacturing machine where I work.

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#4443498 - 06/28/17 07:45 AM Re: Acid filter fail [Re: T-Bone]
Kira Offline


Registered: 08/19/10
Posts: 5242
Loc: Champlain/Hudson Valley
Was there a spill? Don't worry, I won't tell.

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#4443506 - 06/28/17 07:54 AM Re: Acid filter fail [Re: T-Bone]
benjamming Offline


Registered: 01/03/04
Posts: 5919
Loc: northern Alabama
What % HCl?

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#4443536 - 06/28/17 08:26 AM Re: Acid filter fail [Re: benjamming]
volk06 Offline


Registered: 10/04/10
Posts: 4910
Loc: Midwest
Originally Posted By: benjamming
What % HCl?


I would venture a guess of 35-37%.
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#4444320 - 06/28/17 09:03 PM Re: Acid filter fail [Re: T-Bone]
T-Bone Offline


Registered: 12/04/04
Posts: 112
Loc: Beaverton, OR USA
Yep, hydrochloric acid of about 8% concentration at 60 C recirculating through that filter. Normally an all-PTFE filter is used, but a polypropylene one was mistakenly installed.

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