Eco-Tec acid purification unit (APU®) eliminates the practice of dumping or bleeding different types of acid which is contaminated with dissolved metals and solids during pickling, etching and forming. Continuous purification of acids provides significant cost savings. Additionally, benefits also arise in the areas of environmental compliance, increased productivity, improved product quality, and better safety conditions.


  • Consistent acid composition at low metal concentrations provides excellent quality at a predictable rate.
  • Eliminate or reduce process downtime for dumping acid, cleaning sludge out of the tank and preparing acid.
  • Typical acid concentration reduction of up to 50 – 70% to better allow compliance with environmental discharge regulations.
  • Elimination or reduction of acid tank cleaning by continuous purification eliminates this dangerous job of exposing workers to hazardous contact with acids.