Diesel Exhaust Fluid
Diesel Exhaust Fluid (DEF) is a non-hazardous solution, which is 32.5% urea and 67.5% de-ionized water. DEF is sprayed into the exhaust stream of diesel vehicles to break down dangerous NOx emissions into harmless nitrogen and water. This system is called Selective Catalytic Reduction (SCR) and can be found on 2010 and later model year trucks and many diesel pickups and SUVs. DEF is not a fuel additive and never comes into contact with diesel. It is stored in a separate tank, typically with a blue filler cap.
Does DEF expand when frozen?
Yes, DEF expands by approximately 7% when frozen. DEF packaging and tanks are designed to allow for expansion
Caution: Expansion from freezing can cause damage to pumping equipment
What will happen if my truck runs out of Diesel Exhaust Fluid (DEF)?
The U.S. Environmental Protection Agency requires vehicle manufacturers to put measures in place to ensure
that vehicles cannot run without Diesel Exhaust Fluid (DEF). Before a truck’s DEF tank runs empty the driver is
given a series of alerts on their dashboard displays (much the same way as if they were running low on diesel).
Generally speaking, when the DEF tank level drops below 10% an amber warning lamp will come on, at 5% this
lamp starts flashing and below 2.5% a solid amber warning light is displayed.
If the truck is allowed to run out of DEF the engine’s power is reduced, a solid red warning will be displayed
and the vehicle speed will be limited to 5 mph until the DEF tank is refilled.
Check out a presentation on D.E.F here: DEF Presentation
We also have Purus DEF equipment. Which includes many name brand sources like Graco and Micro-Matic.
We have a full line and package sizes of Diesel Exhaust Fluid. Check out our offering here.