YOU HAVE QUESTIONS ABOUT DIESEL EXHAUST FLUID (DEF) DISPENSING AND STORAGE — OUR BENECOR EXPERTS HAVE ANSWERS.
WHAT IS DIESEL EXHAUST FLUID?
Diesel Exhaust Fluid (DEF) is one of the key elements of the Selective Catalytic Reduction
(SCR) process used by most medium and heavy-duty engine builders to meet EPA 2010
regulations. DEF is a non-toxic, stable, colorless, odorless solution of 67.5% purified water
and 32.5% ultra pure automotive grade UREA.
DEF is sprayed into the exhaust stream where it reacts with the NOx in the SCR system
to form nitrogen and water. DEF should not be added to the fuel tank, there is instead, a
separate tank for DEF on SCR equipped vehicles.
WHAT IS UREA?
UREA is a central compound in diesel engine technology designed to meet the Environmental
Protection Agency’s (EPA) 2009 and 2010 NOx reduction mandates for the heavy duty and
light duty segments.
HOW DOES SELECTIVE CATALYTIC REDUCTION (SCR) WORK?
SCR uses DEF (Diesel Exhaust Fluid) to reduce NOx (Nitrogen Oxide). Small quantities of
diesel exhaust fluid (DEF) are injected into the exhaust upstream of a catalyst, where it
vaporizes and decomposes to form nitrogen and water vapor. Nitrogen makes up about
78% of the air we breathe every day.
IF DEF HAZARDOUS?
No, DEF is classified as – Nonhazardous, Nontoxic and Nonflammable.
WHAT DOES DEF WEIGH?
DEF weighs about 9 lbs. per gallon.
WHAT ARE THE STORAGE REQUIREMENTS FOR DEF?
DEF should be stored out of direct sunlight, in a well-ventilated area, cool, dry. Although
the optimum storage temperature is up to 77°F (25°C), temporary exposure to higher
temperatures has little to no impact on the quality of DEF.
WHAT IS THE LIFE OF DEF?
The shelf life of DEF is directly related to the ambient storage temperature. DEF will
degrade over time depending on temperature and exposure to sun light. When stored
between 10 and 90°F, shelf life will easily be one year. If the maximum temperature does
not exceed approximately 75°F for an extended period of time, the shelf life will be two
years. BENECOR offers Bulk Dispensing Systems and Tote / IBC Systems with climate control.
HOW DOES AN OPERATOR DETERMINE THE AMOUNT OF DEF THEY WILL NEED?
DEF consumption is approximately 2% To 3% of the diesel fuel consumed.
WHAT TYPE OF EQUIPMENT DO I NEED TO HANDLE AND DISPENSE DEF?
The equipment used to handling and dispensing DEF must be compatible with ISO 22241-3
specifications. Rest assured, all BENECOR products comply with ISO 22241-3 specifications.
HOW DO I KNOW WHAT TYPE OF DEF DISPENSING AND STORAGE EQUIPMENT I
SHOULD BE USING?
Whether it’s Diaphragm DEF Pumps, Centrifugal DEF Pumps, Manual or Smart Start DEF
Pumps, DEF Dispensing System Parts including nozzles, flow meters or hoses, or more
complete DEF Dispensing and Storage Systems including Tote Enclosures for Retail and
Fleets or Bulk Dispensing, BENECOR'S expert sales and engineering team will work with you
to determine the best type of DEF System for your specific needs. Call today and speak
directly to a BENECOR DEF Dispensing and Storage Expert at: 1-844-BENECOR (1-844-
WHAT INDUSTRIES IS DEF USED IN?
BENECOR proudly provides DEF Dispensing and Storage Solutions to all industries using
DEF including; Agriculture, Compressor, Forestry, Marine, Mining, Off Highway, On
Highway, Prime Power, Rail & Stationary Power.