| | We've been using a newly installed DI re-circulating system. | | It's been a big headache. Mostly understanding what causes our resistivity to be unpredictable. I think I've got a handle on that part now. The system consists of a Carbon,HMR(chealet),Cation, Anion, tanks re-circulated. I want to re-design the system, mostly adding a mixed bed and removing the HMR(chealet)tanks. | | Currently were using this for our TH-hole line only but will soon be using it on our SMT also. | | I'm sorry for all the words,I'm new. THE QUESTION: | | | | Is there anyone else NOT using an HMR/chealet(heavy metals recovery)tank (lead etc..) in their DI system? | | | Chris and Scott, thanks for the info. | Do either of you dump your water?--i.e. first tank from washer, or once a day or a month or never? The reason I'm asking is that I'd like to remove the chealet tanks, but if I recirculate continusly and say dump once every 3 months, without chealet tanks, will I have accumulated metals(lead) that our city won't want all at once, whereas over time(each day) would ok, or will the small amount if any be picked up by me other tanks(Cr,Cat,An)? | I don't dump my water "ever" - every couple of years I go through an acid/bleach cleansing process. Any lead in the water will be picked up by the the resin, any lead that's heavy gets accumulated in my trap tank prior to being pumped into my recirculation tanks (I'm running a two pump setup). I clean my trap out about once a month & dump it in my hazardous material drum labeled "Lead". US Filters treats the resin tanks as containing lead and handles them accordingly - for a price.
Hope this helps, Cheers, Scott
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