An Introduction to Diesel Exhaust Fluid (DEF)
What is DEF?
Here's the technical jargon: It is an aqueous urea solution (AUS 32) made with 32.5% urea and 67.5% deionized water used in selective catalytic reduction (SCR) to reduce nitrogen oxide (NOx) concentration in diesel exhaust.
So, what does that mean in English?
Let's start from the beginning.
The United States Environmental Protection Agency (EPA) has been around since the 1970s with the aim of improving environmental pollution.
One of the key components of the EPA's strategy over the past several decades is regulating the exhaust systems of motor vehicles. More specifically to DEF, these regulations involve diesel vehicles. This effort is concentrated on lessening the emission into the atmosphere of harmful particles and gases.
In the case of DEF, the targeted pollutant is nitrogen oxide (NOx).
I know what you are thinking: Why target diesel engines when they only make up a small fraction of on-road vehicles?
Well, this is because despite diesel vehicles only accounting for 4% of the nation's fleet (according to the DOT), they are responsible for nearly half of all on-road NOx emissions (according to a 2014 EPA study).
How does this effect me?
Whether you fancy yourself a hugger of trees or have never physically embrace one, the EPA has ensured your heavy duty fleet's compliance to it's steadily decreasing threshold of allowable NOx emissions for diesel engines.
For most diesel engines manufactured after January 1, 2010 this compliance involves the installation of a DEF/SCR system on your vehicle.
The SCR system is installed on the vehicle's exhaust system and is specifically aimed at NOx reduction. For the SCR system to function, it uses a depleting resource in the form of a liquid fuel (DEF).
If your vehicles fall under these regulations you have a vested interest in keeping your vehicle compliant by ensuring your emission reduction system is in good condition. This includes the crucial steps of proper DEF fluid usage, transferring and storage.
Also, having your fleet's DEF fluid properly measured, metered and filled is crucial to your productivity. This is because the EPA has ensured compliant vehicles are equipped with measures that make them unable to run without DEF fluid.
How can Fuel Transfer LLC help?
Fuel Transfer LLC offers state of the art Diesel Exhaust Fluid handling equipment. For example, we carry DEF fuel nozzles that are industry approved for DEF applications. Using industry approved equipment is crucial in addressing issues such as DEF contamination.
Fuel Transfer LLC also carries a wide range of transfer equipment to keep your operation mobile (such as DC powered transfer pumps). These products help you prepare for a call from the field. Hopefully that one of your operators is paying attention to their warning lights and alarms, and not because they are crawling along the shoulder of the highway at 5 mph because they ignored them. Either way you can be prepared.
Fuel Transfer LLC offers these and other high quality DEF handling equipment such as:
DEF Management Systems
DEF Transfer Pumps (Hand, AC, DC)
DEF 55 Gallon Drum Trolley
+Many other DEF accessories including hoses, connectors, valves, and couplers.
You can find these products available on our website.