Hello all,
I'm trying to get my Velo filter back into service, but am having an issue getting the plates completely clean. After a 20 minute caustic CIP, followed by a hot water rinse, there was a 15 degree arc on the plates that was still stained with something that appeared to look like semi-dried beer or iodophor. I followed up with a phos-nitric acid CIP for 30 minutes, then another rinse. Stains still there. Left filter bell packed with hot acid overnight, rinsed in the morning, and still stained.
Here's photos of the clean sides of the plate assembly and the stains in question:
clean side
stained side
Nothing seems to be working to get this staining off, you can actually sort of scrape some of the material off on your fingernail, no smell to it, dark and sort of..well....I can't quite describe it. I know the filter is well CIP'd now, but I have hesitation about running beer through the plates with this staining material on it. Any other suggestions?
--Rob
I'm trying to get my Velo filter back into service, but am having an issue getting the plates completely clean. After a 20 minute caustic CIP, followed by a hot water rinse, there was a 15 degree arc on the plates that was still stained with something that appeared to look like semi-dried beer or iodophor. I followed up with a phos-nitric acid CIP for 30 minutes, then another rinse. Stains still there. Left filter bell packed with hot acid overnight, rinsed in the morning, and still stained.
Here's photos of the clean sides of the plate assembly and the stains in question:
clean side
stained side
Nothing seems to be working to get this staining off, you can actually sort of scrape some of the material off on your fingernail, no smell to it, dark and sort of..well....I can't quite describe it. I know the filter is well CIP'd now, but I have hesitation about running beer through the plates with this staining material on it. Any other suggestions?
--Rob
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