Blog > February 2020 > Commonly Asked Questions About DEF

Commonly Asked Questions About DEF

February 19, 2020


The one product I get asked about the most is Diesel Exhaust Fluid (DEF).  As producers upgrade their different pieces of equipment, many are exposed to DEF for the first time.  With ever tightening EPA regulations, more and more equipment is starting to use DEF.  I thought that I would share some of the more common questions I hear and share the answers I use to answer those questions.

“What is DEF?”  DEF stands for diesel exhaust fluid.  DEF is non-hazardous solution that consists of 32.5% urea and 67.5% de-ionized water.  The urea that is used in DEF is produced in the same manufacturing plants as agricultural urea but is a purer product.    

“What are my options when it comes to handling DEF?”  Central Valley Ag has a few different options when it comes to container size.  We offer 2.5-gallon jugs, 55-gallon drums, 125-gallon totes, 275-gallon totes and 330-gallon totes.  When it comes to the totes, we can refill them with a bulk delivery to the farm.  We also currently offer DEF at the pump, at a handful of CVA fueling sites.  We have many options available to transfer the DEF.  We carry a variety of high-quality hand pumps and electric pumps.  We have tried a lot of different brands in order to offer the best quality equipment for our customers.

“What do I need to know when it comes to storing DEF?”  This is one of the most important things to consider when it comes to handling DEF.  DEF has a shelf life of two years when stored in optimal conditions.  The shelf life of DEF is greatly reduced when stored in direct sunlight or if the temperature of the DEF is kept above 86 degrees for an extended period.  DEF will also turn into a slush at 12 degrees.  While this will not hurt the DEF, it should be warmed back up in order to return the product to a liquid before pumping.  The number one thing to remember when using DEF is cleanliness.  DEF should be kept in a clean sealed container to avoid contaminants.  Contaminants can cause costly issues with the DEF systems on equipment.  All Central Valley Ag’s bulk DEF systems use a dry break connection to help alleviate any issues that could occur when we pump and deliver DEF.

“Are all DEF products the same?”  When you are looking to purchase DEF, make sure that you see an API logo.  API stands for the American Petroleum Institute.  The American Petroleum Institute offers a program designed to certify and monitor diesel exhaust fluid intended for use in equipment with a diesel engine.  DEF marketers that meet the requirements outlined in the latest version of ISO 22241, Diesel engines-NOx reduction agent AUS 32, receive a licensed to display the API Diesel Exhaust Fluid Certification Mark.  If you are going to purchase DEF, look for that logo or ask your supplier to provide it.  Central Valley Ag only buys DEF from manufacturers that have gone through this testing and have the API seal.

“Is DEF harmful or dangerous?”  DEF is non-toxic.  Of all the fluids in a piece of machinery, DEF is the least hazardous.  If you spill DEF, you can simply wipe off or wash it away with water.  No special protective clothing is needed when filling your DEF tank.  If you get any product on you, simply wash it with water.  DEF can be corrosive to some metals like copper, aluminum, zinc and carbon steel.  You should not store DEF in a container made from these materials.

The need for DEF is growing rapidly as more and more equipment is using it.  Central Valley Ag is constantly working to provide the latest information and products to our producers.  If you have any questions regarding diesel exhaust fluid or any of the other products we offer, please reach out to a member of the Central Valley Ag energy team. 
by Chris Clingman
Posted: 2/19/2020 9:13:38 PM by Mallory Shoemaker | with 0 comments


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