Selective Catalytic Reduction (SCR) Emission Control systems
consist of a catalyst, a reducing agent (DEF) and a dosing
system which injects a mist of DEF into the exhaust downstream
of the engine and diesel particulate filter. The DEF mist
vaporizes in the heat of the exhaust forming ammonia and carbon
dioxide which then reacts with the catalyst and NOx emissions,
converting NOx to nitrogen and water, which are harmless.
Super S DEF Meets Applicable Standards, Specifications and Performance
Requirements for use in all SCR Emission Control Systems.
• High Purity 32.5% Aqueous Urea Solution
• API Certified and meets ISO 22241 specifications
• Compatible with all diesel SCR systems
• Non-toxic, non-hazardous and non-flammable
HOW MUCH WILL I USE? What If It Freezes? What about
SCR systems are designed to use approximately 2 gallons of DEF
for every 100 gallons of fuel, with a range among most engine
manufacturers reported to be around 1 to 3 gallons DEF/100 gal
fuel. Actual usage may run higher as consumption will vary with
engine performance and driving conditions. SCR equipped trucks
are expected to provide increased engine efficiency/ fuel
economy, providing a reduction in operating costs, even when
factoring in the additional cost of DEF.
WHAT HAPPENS IF I RUN OUT?
If you run out of DEF, engine power will be substantially
reduced until you add DEF.
WHAT IF IT FREEZES?
DEF freezes below 12°F, but freezing will not harm DEF. It can
be used again, once it thaws. DEF tanks will be equipped with
heaters to keep DEF liquid in cold temperatures.
WHAT ABOUT STORAGE?
DEF should be stored at temperatures between 10 and 86°F. Above
86°F, shelf life (in a non-vented container) may degrade to less
than a year. DEF is corrosive, such as to aluminum, copper,
brass and zinc, and should be stored in approved containers such
as HDPE plastic or stainless steel. DEF and all surfaces with
which it comes into contact must be completely clean or it will
compromise the DEF’s purity and harm or degrade the SCR system.