DEF Academy

Combatting DEF Freezing Issues in Cold Weather with NUDEF

Posted on by NuDEF

For diesel engine operators, winter brings a unique set of challenges, particularly when it comes to Diesel Exhaust Fluid (DEF) freezing. DEF, a solution of urea and deionized water, is essential for reducing harmful emissions in diesel engines equipped with Selective Catalytic Reduction (SCR) systems. However, DEF can freeze at temperatures of 12°F (-11°C) or lower, leading to significant operational problems. In this article, we explore the complications that arise when DEF freezes and how NUDEF, a specialized DEF additive, can effectively lower the freezing point of DEF and prevent these issues.

The Impact of Frozen DEF

Frozen DEF can severely disrupt the performance of diesel engines and their compliance with emission standards. Here are some key issues caused by DEF freezing:

  1. Blocked Flow: Frozen DEF can create blockages in the lines and injectors, preventing DEF from reaching the SCR system and thereby hindering the reduction of NOx emissions.
  2. Pump and Injector Damage: DEF pumps and injectors are not designed to handle solid or semi-solid substances. Frozen DEF can lead to mechanical failures and costly repairs.
  3. System Errors and Shutdowns: Many modern diesel engines are equipped with sensors to detect adequate DEF flow. Frozen DEF can trigger error messages, check engine lights, and even engine shutdowns in severe cases.
  4. Increased Downtime and Maintenance Costs: Dealing with frozen DEF can lead to increased vehicle downtime, especially in fleets operating in colder climates, directly impacting operational efficiency and increasing maintenance costs.

How NUDEF Addresses and Prevents DEF Freezing

NUDEF is an innovative DEF additive designed to tackle the challenges of DEF freezing. Here’s how NUDEF makes a difference:

  1. Lowers the Freezing Point: NUDEF contains ingredients that lower the freezing point of DEF. By reducing the temperature at which DEF begins to freeze, NUDEF ensures that DEF remains liquid and functional even in extremely cold conditions.
  2. Prevents Urea Crystallization: A key feature of NUDEF is its ability to prevent the crystallization of urea, which is a primary factor in DEF blockages and system inefficiencies. By maintaining DEF in a stable, liquid state, NUDEF prevents crystallization that can lead to freezing.
  3. Enhances DEF Fluidity: NUDEF not only prevents DEF from solidifying but also improves its overall fluidity. This enhanced fluidity ensures smoother flow through the system, reducing the risk of blockages and the strain on pumps and injectors.
  4. Protects System Components: By keeping DEF fluid and preventing crystallization, NUDEF reduces wear and tear on system components like pumps and injectors. This lubricating action helps extend the life of these essential parts and reduces the need for frequent repairs.
  5. Improves Cold Weather Performance: With NUDEF, diesel engines can start and operate more efficiently in cold weather, reducing downtime due to frozen DEF and helping fleets maintain their operational schedules without interruption.

Conclusion

Frozen DEF is more than just a nuisance; it can lead to significant operational disruptions and costly repairs. NUDEF offers a proactive solution to this cold-weather challenge, ensuring that DEF remains liquid and functional even under severe conditions. By using NUDEF, diesel engine operators can maintain peak performance and compliance with emissions standards, regardless of the temperature.