In 2010, the Environmental Protection Agency mandated the use of selective catalytic reduction (SCR) in diesel engines. In an SCR-equipped vehicle, the exhaust gas from the engine goes through a particulate filter to eliminate the soot and ash generated from burning diesel fuel.
The SCR system sprays diesel exhaust fluid (DEF) into the exhaust gas to help eliminate the NOx emissions in diesel engines. DEF is a combination of urea and deionized water, and the urea from the DEF and the exhaust gas react with a variety of metallic compounds to convert nitrogen dioxide and monoxide into nitrogen and water.
It is critical that the diesel engine fluid stays pure. Impurities can cause the SCR system to stop, which will shut down the operation of the truck.
Poly Processing works with DEF manufacturers and distributors to provide reliable storage solutions that ensure their DEF stays 100% pure.
Diesel Exhaust Fluid Storage Considerations
DEF solution is a clear, non-toxic chemical. It is safe to handle, but it can corrode certain metals, so it is important to design a bulk storage system that can give you top performance for many years.
DEF Storage Solutions
Safely protecting the purity of the diesel exhaust fluid is the number one goal of a storage system. Since DEF is a high-purity chemical, it should receive the same level of storage treatment as other high purity chemicals. Never store DEF in an old oil or diesel fuel storage tank and never add any chemicals or water to the chemical solution.
DEF should be stored at an optimal temperature to reduce the chance of separation and settling. In some cases, we recommend adding heat pads and insulation to the tanks to maintain the proper temperature.
To maintain the purity of DEF, proper and complete draining is required to remove any sediments and impurities. Without complete draining, impurities will eventually build up and can contaminate the entire supply of DEF solution.
Poly Processing’s sloped-bottom IMFO® system is ideal, because it provides a full drain, without requiring additional maintenance. In the IMFO system, the flange is molded into the tank during manufacturing, not post-production as an insert. The one-piece construction enables the flange to be placed at the very bottom of the tank’s sidewall, below the knuckle radius—not two inches above it. IMFO tanks are full-drain polyethylene tank systems which provide a true full drain of your stored chemicals.
IMFO-style fittings are made from the same material as the tank, creating a one-piece, homogeneous unit. Because the IMFO fitting is part of the tank itself, there is no added stress on the lower sidewall.
The vertical IMFO system is available up to 15,500 gallons, and the Sloped-bottom IMFO system is available up to 15,000 gallons.