Skip to content

Sierra Chemical

DEF

proxy-white-icon

Diesel Exhaust Fluid

proxy-white-icon

Diesel Exhaust Fluid

About DEF and SCR

Diesel Exhaust Fluid consists of high purity urea (typically crystalline) that is dissolved and suspended in de-ionized water. The approximate ratio of the mixture is 32.5% urea and 67.5% de-ionized water. DEF is not a fuel additive and must be filled into the dedicated Diesel Exhaust Fluid tank on your diesel vehicle.

When DEF is used with Selective Catalytic Reduction system, it helps reduce the amount of NOx emissions. The reduction in emissions is required to meet the EPA published Tier 2 Emission Standards for Light Duty and Heavy-Duty Vehicles. This standard regulates new strict emission control that began January 1, 2010.

DEF_illustration

DEF Benefits

Reduce Pollution

One of the leading causes of air pollution are NOx emissions.

DEF main job is to break down the nitrogen Oxide (NOx) gases into nitrogen and water to be safely release into the atmosphere.

Better Efficiency

Truck manufacturers using SCR system can be worried free when it come to design engines. Having this system allows them to focus on performance making sure that SCR system will take care of the emissions. Trucks manufacturers not using SCR systems need to redesign and compromise performance in order to reduce emissions.

Reduced Maintenance

The combination of DEF and SCR allows the manufacturers to focus on performance and to get rid of pollutants making the engines to run better. Your vehicle will have better fuel economy, increased power, decrease in vehicle maintenance and less wear and tear on your engine.

Maximize Fuel Efficiency

DEF and SCR technology combine, not only reduces NOx emissions it essentially improves a vehicle’s horsepower.

Making diesel engines to run more efficiently, resulting in fuel savings.

FAQ

def-diesel
What is DEF?

Diesel Exhaust Fluid better known as DEF is a non-hazardous solution, which is 32.5% urea and 67.5% de-ionized water. When used with selective catalyst reduction it reduces the amount of NOx emissions.

Can you get DEF anywhere?

DEF is readily available at most fueling stations and automotive parts retail stores. Truck stops often have a DEF pump right on the fuel island. If you have a large enough fleet and the storage capacity to justify bulk purchasing and to ensure that you are receiving a quality product, please contact us!

What’s the shelf life of DEF?

It is recommended to store DEF in a climate-controlled environment and out of direct sunlight to extend shelf life. Diesel Exhaust Fluid shelf life depends on the temperature of the storage facility. It is recommended that DEF be stored between 12°F and 86°F, but shelf life can be extended up to 2 years if stored below 65°F.

What happens if DEF freezes?

When the engines are not in use, DEF will freeze at 12°F (-11°C). At this concentration level, the urea and the water freeze and unfreeze at the same rate, ensuring that you always have the correct amount of each. This is why it is important to make sure you get a quality brand of DEF that meets ISO specifications.
Frozen DEF does not compromise the start-up or operation of the vehicle. Once the engine start-up, the Selective Catalytic Reduction (SCR) system provides heat to the DEF tank and lines allowing the DEF to unfreeze rapidly and keeps it flowing regardless of the outside temperature.

How much DEF Do I Need?

On average, DEF consumption is 3-5% of your total fuel consumption levels. DEF consumption will vary depending on the environment, operation and duty cycle of your equipment. If you know the average fuel consumption your vehicle, you can easily calculate the amount of DEF that will be used. Another thing to consider it is that DEF will be consumed on a 50 to 1 ratio with diesel. (For every 50 gallons of diesel fuel burned, you will use 1 gallon of DEF).

Our Diesel Exhaust Fluid is API Certified

api-def-certified

The API Diesel Exhaust Fluid (DEF) Certification Program is a voluntary and was created to monitor the quality and characteristics of DEF (Diesel Exhaust Fluid) intended for use in motor vehicles with diesel engines.

This certification allowed marketers to demonstrated their DEF satisfy the requirements of the API (American Petroleum Institute) and the most recent and applicable edition of ISO 22241 Diesel engines – NOx reduction agent AUS 32, may be licensed to display the API Diesel Exhaust Fluid Certification Mark.

We offer a variety of ways to purchase DEF including 2.5-gallon jugs, 55-gallon barrels, 330 gallon totes and by the truckload.

man-fueling-a-gas-tank-of-a-truck

Save time! Order online!

Do NOT follow this link or you will be banned from the site!