Diesel Exhaust Fluid (DEF) is a water-urea solution (32.5% high-purity urea and 67.5% deionized water) that is generally carried in a separate tank and is injected into the hot exhaust stream of an engine and absorbed onto a catalyst.
The purpose of DEF is to reduce nitrogen oxide (NOx) concentration in the exhaust emissions produced by diesel engines. The process by which NOx emissions are reduced is called Selective Catalytic Reduction (SCR). DEF is non-toxic, nonflammable, non-hazardous and non-explosive.
The U.S. Environmental Protection Agency issued emissions standards in 2010 for diesel vehicles of all sizes. These emissions standards are very stringent and most light-duty and heavy-duty trucks are not able to meet the standards without using SCR.
In addition to helping to meet NOx emission standards, DEF can also provide fuel savings. Fleet experience with heavy duty trucks model year 2010 and newer suggest 5% fuel savings compared to 2007 model year vehicles with similar engines.
Contact us for more information on our DEF products.