Why does it matter?

DEF contamination can be detrimental for equipment, so it’s important to be informed. Among the common causes for equipment problems, 60% can be attributed to contamination & poor filtration! The cleanliness of lubricants and fluids such as DEF are directly linked to the reliability of the equipment.

Sensitivity to contamination

DEF is highly sensitive to impurities, so it is especially important to keep DEF clean. This is why manufacturing, storage, and handling of DEF must comply with ISO 22241 product purity standards – including quality specification for the water used to make DEF.

Possible corrosion

It’s important to keep in mind that DEF is corrosive to certain metals, including: Magnesium, iron, steel, zinc, nickel, copper, aluminum.

Contamination: What and where

Common sources of contamination to DEF include, but are not limited to: Chemicals, coolants, engine oil, and water.

Common situations in which contamination may occur include: Purchasing DEF at the pump, accidentally mixing with diesel, not using the dedicated pump / nozzle when filling DEF tank, and not using a dedicated DEF container.