Original Date: 04/22/1996
Revision Date: 01/18/2007
Information : Powder Coating of Casting
The Mueller Company in Chattanooga, a manufacturer of water valves for water handling requirements, operates its own foundry for casting iron bodies and consequently maintains 26 environmental permits, seven of which are painting permits. To respond to a 1984 environmental laws limiting volatile organic compound (VOC) emission, Muller began working with the Hamilton County Air Pollution Control Board to find ways to meet the new, stringent standards. Through cooperation and assistance, the company was able to come into compliance. Improvements in products and processes allowed Mueller to further reduce its VOC emissions by installing a powder coating system for over 85% of its products.
Figure 3-1 illustrates the powder coating process line that the company installed and began operating in 1994. The addition of this line and replacement of non-environmentally friendly processes has produced savings of $100K- $200K per year for Mueller while continuing to reduce the emissions of VOC s.
(Figure 3-1) “Powder Coating - Cast Iron Valve Components”
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