Elkamet urea tanks are an important system component when it comes to meeting diesel emission standards. For trucks and buses, these are Euro 6 in Europe and EPA 2010 in the USA, and for agricultural and construction machinery, they are Stage IIIB, IV, and V in Europe and Tier 4 final in the USA. In most cases, the SCR (selective catalytic reduction) process is used to achieve these limits, in which an aqueous urea solution is injected into the exhaust gas stream. The urea breaks down into ammonia, which is used to reduce nitrogen oxides in the SCR catalyst.
The urea solution is known in Europe under the name AdBlue ®, while in the USA it is usually referred to as DEF (for Diesel Emission Fluid or Diesel Exhaust Fluid). Due to the highly corrosive properties of the urea solution, urea tanks are usually made of
