Beginning January 1, 2010, all new diesel-burning vehicles must meet the Enviromental Protection Agency’s Tier 2 emission standard: 0.2 grams of nitrogen oxide (NOx) per brake horsepower-hour. In order to do so, vehicle and engine manufacturers have developed technologies to reduce the NOx emissions. Most manufacturers, including Ford, Volvo, Detroit Diesel, Cummins, PACAR, MACK, Daimler and Mercedes Benz equip their vehicles with Selective Catalytic Reduction (SCR) technology which uses DEF to convert NOx into harmless nitrogen gas.
DIESEL EXHAUST FLUID
FREQUENTLY ASKED QUESTIONS
What is Diesel Exhaust Fluid? Diesel Exhaust Fluid, or DEF, is a high purity solution of 32.5% urea in deionized water. A key specification in the ISO-22241 standard is the DEF product’s urea concentration. UREA is a colorless, ordorless solid that is widely used in fertilizers. The Engine Manufactures Association has estimated the US DEF demand at 50 million gallons in 2010 and rising to 750 million gallons in 2015 and 1.3 billion gallons in 2019.
How does is work? In a vehicle outfitted with an SCR system, DEF has a separate on-board storage tank (6-10 gallons on light-duty, vehicles; 10-30 gallons on heavy-duty vehicles). DEF is pumped through a filter and injector and into the exhaust stream. Injectors are very sensitive and any un-dissolved material may clog filters or injectors. Additionally, dissolved material can result in premature SCR catalyst failure. Premature failure will activate the on-board vehicle diagnostics systems, dramatically reducing vehicle performance.
Does DEF require special storage and handling? Yes. Because DEF purity is extremely important, ISO standards limit the materials the fluid can contact. The suitable materials are stainless steels, titanium. hastelloys and several plastics, so long as they are free of additives. Bottles, drums and totes are most commonly made of high density polyethylene (HDPE) or polypropylene. Materials specifically not recommended included non-ferrous metals and alloys (copper, aluminum, magnesium, silver, zinc, lead), solders containing non-ferrous metals.
Where can I find DEF and required dispensing products? RIGHT HERE. LSI is a proud supplier of NOxBLUE DEF fluid and PIUSI products ranging from 55 gallon drum and 330 gallon totes to DEF standard dispensers, pumps and meters. With over 30,000 DEF pumps installed in Europe, the PIUSI line of DEF products is market tested. The relationships LSI has established with DEF distributors make us YOUR ONE STOP SOLUTION FOR ALL YOUR DEF NEEDS.
Below you will find a picture of a Micro Matic DEF PDF presentation click and down load it for more detailed information on a closed loop system.