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Filda Filters' DEF/urea filters line safeguards SCR systems by eliminating urea contaminants, ensuring functionality, and prolonging their lifespan. Urea filters play a vital role in the SCR system by preventing urea crystals and impurities from causing exhaust pipe catalyst failure, damage, or urea nozzle blockages. Installing Filda's urea filters ensures the proper operation of the SCR system, controlling NOx emissions in compliance with environmental regulations.