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Counterflow Rinsing Design

NEED INFO ON COUNTERFLOW RINSING, PROCESS DESIGN OF TANKs, etc. WOULD LIKE TO RETROFIT TWO TANKS TO COUNTERFLOW.

Mark Muchoney
1998

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The Metal Finishing Guidebook has an article by yours truly on this subject.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
1998

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Mark,

The May 1982 "Plating & Surface Finishing" magazine has an excellent tip on counterflowing 2 tanks without expensive plumbing or pumps.

Mike McDonald
mack products - Jefferson, Wisconsin
1998

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Dear Mark, The reason to counterflow is to both save money and keep your TDS to an allowable limit. If you had say a five stage washer without counterflowing, you would overflow the rinse stages to keep the TDS down. With counterflowing available, you would counterflow stage 4 rinse to stage 3 phosphate and to 2 rinse. Stage 2 would feed stage 1 cleaner. In this scenario, you do not put water down the drain unless you have a particularly heavy dragout fron stage 1 into stage 2 "1000 TDS or over". With todays push for water conservation this will go all long way and should also assist you on your SAC rate also.

Bob Utech Benson, Minnesota

Ed. note: Bob is the author of: "High Performance powder Coating" on eBay or AbeBooks or Amazon [affil links]

1997