Lockheed Martin Tactical Aircraft Systems - Ft. Worth, Texas
LMTAS has successfully implemented low vapor pressure solvent blends and a waste cloth management and disposal system in order to eliminate ozone depleting compound emissions in its wipe cleaning operations and still maintain low Volatile Organic Compound (VOC) emissions from its solvent cleaning operations.
In September 1992, LMRAS replaced an 85% chlorofluorocarbon-113 (CFC-113), 15% VOC blend for wipe operations with a new low vapor pressure solvent and waste cloth management system, eliminating 200+ tons-per-year of CFC-113 emissions. Also, this implementation decreased VOC emissions; 1996 VOC emissions from cleaning solvents were only 1.9 tons-per-year. The same operations emitted ~45 tons-per-year of VOC and ~250 tons-per-year CFC-113 in the late 19980s.
the low pressure solvent blends were selected after full-scale laboratory corrosion tests and cleaning performance tests. The solvents have been licensed to Dynamold Solvents and are sold to several aerospace and non-aerospace firms. Cost savings plus cost avoidance have been documented for $0.95 million for 1993 and $1.3 million for 1994. LMTAS management recently estimated the cost savings from the wipe solvent implementation to be $8.2 million for the five-year period of 1992 to 1997.
Five United States of America (USA) patents and three Taiwanese patents have been issued to LMTAS on the DS series solvent formulations and the waste cloth management system. More patent applications (USA and international) are either pending or are being reviewed by the Patent Office.
This technology represents the design of solvent blends that are less toxic than many of the alternatives previously being used, such as MEK (methylethylketone), TCA (1,1,1-trichloroethane), and various blends of toxic solvents. The reduced solvent usage and waste cloth management system makes the cleaning solvent Inherently safer with regard to accident potential. EPA has recognized this technology as having environmental benefits via several IPA Stratospheric Ozone Protection Awards in 1993 and a Certificate of Recognition for Significant Reduction in Hazardous Air Pollutants, in 1994. EPA has additionally recognized that the technology is applicable to industry and society via the incentives/requirements to use this technology in the Aerospace National Emission Standard for Hazardous Air Pollutants (August 1995) and the draft Aerospace Control Technology Guide (July 1996).