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Posted by ron dille on March 01, 2002 at 23:42:32:
In Reply to: Re: Boiler Anti-Foam posted by ron dille on March 01, 2002 at 23:40:01:
: : Does anybody understand how anti-foam works? Have been using it for a few months about 1 quart per barrel of sulfite.
: : I think the active ingredient is polyethylene glycol. Does it change surface tension or is it acting in some other way.
: : Before our condensate conductivity often ran over 1000 uS, at times it was the same as boiler water.
: : Now condensate runs 20-50 uS.
there is a silicone based that is used in cooing and a glycol based that is used in boilers. sounds like you had carry over from the high tds levels. the defoamer will help with that. foam is uasually caused by oils , high tds or over feed of chemicals. you may want to look into this.