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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
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
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
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.
A Guide to High Performance Powder Coating
by Bob Utech [affil. link to Amazon]