Diesel Exhaust Fluid or DEF is a high purity chemical solution containing 32.5% urea mixed with high purity deionized water. It’s used to stay in compliance with the Environmental Protection Agency (EPA) stringent emissions requirements mandated in 2010. DEF is used in conjunction with a technology called Selective Catalytic Reduction (SRC) as an injection to reduce harmful NOx.
As with highway use the EPA has now mandated the reduction of NOx in off road use. Some of which include:
- construction equipment
- farm tractors
- other agricultural equipment
- heavy forklifts
- airport ground service equipment
As well as utility equipment such as:
With such a large and growing need for DEF product there is also obviously the need to store it properly. Several types of storage container options are available that range from 2.5 gallon buckets to 8500 gallon tanks, and everything in between. Purchasing DEF in the smaller containers is more expensive per gallon and typically used for emergency supply for trucks. The larger containers, or bulk storage tanks, are primarily used with very large fleets. While the great bulk tanks are more cost effective per gallon (buying in bulk is always a bargain. Just ask the millions of Costco lovers around the world) they can be an expensive initial investment. This is why most DEF storage containers tend to be “mini-bulk” storage containers.
330 gallon totes and 55 gallon drums seem to be the trend with many companies right now. Both can be refilled easily and there are several equipment companies that offer electrical or pneumatic pump and hose systems that work well with these containers. There are also freeze protection solutions available for storage in extreme cold climates.
The important thing to remember is to keep your DEF contaminant free. DEF is not harmful to touch and if you get it on your skin you can wipe if off easily without worrying about chemical burns, but contaminated DEF can cause harmful side effects to your SRC system, which can be devastatingly costly to repair or replace. Proper storage and handling care is essential to prolonging the life of this important material.