Dongfeng Xinjiang truck parts Muffler with front air duct insulation function 1203410-TCWF01Y

Equipped with a professional-grade insulation structure, this muffler addresses the high-temperature challenge of diesel engine exhaust. The front air duct and muffler outer shell are wrapped in a three-layer composite: inner high-purity ceramic fiber (operating temperature ≤650℃), middle aluminum foil reflective membrane (radiant heat reflection rate ≥93%), and outer glass fiber reinforcement cloth. When exhaust temperature reaches 500℃ (peak for heavy-duty engines), the outer surface temperature remains ≤62℃—a 75% reduction compared to non-insulated mufflers. This prevents heat damage to adjacent components (fuel lines, wiring harnesses, brake hoses) and lowers the cab’s bottom ambient temperature by 10-12℃, improving driver comfort in hot regions like Xinjiang and Inner Mongolia

Beyond insulation, the muffler achieves exceptional noise reduction through a dual-chamber resonance-dissipation design. The first chamber uses perforated tubes to split exhaust airflow, reducing primary noise by 25dB(A), while the second chamber’s sound-absorbing cotton (glass fiber with high-temperature resin binding) absorbs residual high-frequency noise (2000-5000Hz). The integrated front air duct’s spiral guide vanes further stabilize airflow, minimizing turbulent noise by 12dB(A). Overall, the muffler reduces exhaust noise to ≤85dB(A)—well below GB 7258-2017 limits (≤89dB(A) for heavy-duty trucks)—creating a quieter cab environment and reducing noise pollution in residential areas during urban distribution

Engineered for Dongfeng Xinjiang trucks’ harsh working scenarios (desert crossings, mountain hauling, construction sites), the muffler boasts superior structural robustness. The main body is made of 439 stainless steel (2.0mm thickness) with a ferritic structure, resisting thermal fatigue and corrosion—passing 150,000km vibration tests (5-2000Hz, ISO 16750-3) without cracking. The flange uses a heat-resistant graphite gasket (≤600℃) that maintains a leak-tight seal, ensuring compliance with GB 17691-2018 National VI emissions. The insulation layers are bonded with inorganic high-temperature adhesive and fixed by 304 stainless steel straps, avoiding delamination even under extreme temperature cycles (-40℃ to 550℃) in northeast China’s winters

Optimized for commercial fleet efficiency, the muffler features a user-centric design. The 6-bolt front flange uses M12×40 galvanized grade 10.9 bolts that match the exhaust manifold’s original holes, allowing two technicians to complete installation in 45 minutes with only a torque wrench (45-50N·m). The outer surface is coated with high-temperature ceramic paint (≤600℃), resisting road salt and sand erosion—passing 1200-hour salt spray testing (ASTM B117) with no red rust. The dual-chamber design minimizes carbon deposition, requiring maintenance only every 180,000km. Clear “INLET/OUTLET” markings and pre-installed hangers prevent installation errors, while the integrated structure (muffler + front duct) eliminates assembly gaps, reducing potential leak points