![]() The only change that could occur is alkalinity as ammonia, therefore these items that could theoretically come out of spec are not a concern as ammonia is the target. However, formaldehyde, biuret, or any other metal ions are not going to appear in the solution while the product sits in storage for an extended period of time. If stored too long, theoretically the DEF can become off-spec. Engines with SCR are specifically engineered for optimal performance at this ratio. If the DEF freezes, it will not allow the unit to be in compliance, and for Tier 4-certified equipment, inducement shutdowns will be implemented.ĭiesel exhaust fluid is formulated with 32.5% urea and 67.5% deionized water. When operating at extreme cold temperatures, it’s important to keep DEF from freezing. When frozen 32.5% urea DEF thaws, it will not leave any solids behind or change the effectiveness of the fluid. DEF’s composition enables it to freeze and thaw just like water and ice. The 32.5% concentration of urea in DEF was determined as ideal by the ISO committee because it has the lowest freeze point of any other urea/water mixtures. Proper storage of DEF is required to prevent the liquid from freezing at temperatures below 12☏. and Europe, storage requirements for DEF have not been a concern. Based on more than ten years of using DEF in the U.S. In most markets and applications, DEF will be consumed before the shelf life expires. Proactive monitoring and maintaining recommended concentration specifications will help prevent issues when operating beyond ISO guidelines. In general, the shelf life for DEF will be a minimum of one year in most U.S. ![]() When calculating shelf life at your site, consider daily temperature fluctuations, as well as seasonal. Note that the chart shows recommended shelf life at a constant temperature. It serves the North American market with dedicated vessels.Storing DEF in a climate-controlled environment and out of direct sunlight is recommended. ![]() Our plant in Brunsbüttel Germany, offers overall the world's largest production capacity and has the world's largest storage tank for DEF, with a capacity of 17,500 m³ of DEF quality solution. This ensures a reliable, continuous supply of high-quality DEF to customers anywhere in the world. Yara's total production capacity a year is 2.8 million tons. The largest DEF production capacity in the world Yara has a network of five DEF production plants around the world to make sure that DEF is always available to you: This means you can rely on the quality and purity of Yara's DEF. This process is quality assured to ensure an exceptionally pure result that meets the stringent specification set out in ISO 22241-1. Urea is produced synthetically from ammonia and CO₂ (carbon dioxide), from which Yara's DEF is extracted directly as "hot melt" urea, which uses a different process from fertilizer grade urea. Our DEF is produced from a solution of high-purity, virgin urea. You can depend on Yara for a safe supply of DEF as we are market leader with a production capacity of 2,8 Mt of DEF a year - the largest in the world. Rely on quality and a secure supply from Yara Commercial fleet operator of coaches, trucks or buses.Our local sales team offers expertise to help with questions or quotes so you need never run dry of DEF if you are a: ![]() Since 2005 in Europe and 2010 in North America, Yara has worked alongside and guided, thousands of fleets of all sizes in their choice of Diesel Exhaust Fluid and DEF equipment. Yara has been a pioneer in this market as since 1993, we have worked to achieve a Diesel Exhaust Fluid ISO standard on the production and distribution of the product setting out specifications to help safeguard consumers from Diesel Exhaust Fluid suppliers of poor quality.
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