Dongfeng xinjiang truck parts Connect evaporator and compressor air conditioning pipe assembly 8108030-KXR602Y

Built to optimize the AC system’s low-pressure phase (vapor refrigerant return from evaporator to compressor), this pipe assembly features a design focused on efficiency and component protection. The 6061-T6 aluminum pipe’s inner diameter (20mm) is sized to maintain ideal refrigerant velocity (0.7-1.0m/s)—critical for preventing liquid refrigerant carryover (a leading cause of compressor slugging and damage). The inner surface is precision-polished to a roughness of ≤0.5μm, reducing flow resistance by 18% compared to standard pipes and ensuring stable suction pressure for the compressor. Pre-formed bends have a minimum radius of 45mm, avoiding constriction that could create pressure drops or vapor turbulence. Additionally, the pipe’s length is matched to the truck’s wheelbase (e.g., 4.2m for X7 Pro long-wheelbase models), ensuring proper refrigerant residence time in the evaporator for full heat exchange. This optimization boosts cooling efficiency, allowing the AC system to lower cab temperature by 3-4℃ faster than generic alternatives

Engineered to withstand the AC system’s low-pressure demands while preventing refrigerant leaks, the pipe assembly delivers robust performance. The 6061-T6 aluminum pipe (wall thickness: 2.2mm) has a burst pressure rating of 30MPa—far exceeding the low-pressure loop’s maximum operating pressure (7MPa). Flared O-ring fittings are equipped with high-performance fluororubber (FKM) seals, which resist refrigerant, oil, and temperature fluctuations (-45℃ to 210℃) better than standard nitrile seals. Each fitting undergoes a dual-leak test during production: a 24-hour vacuum test (down to 40mbar) and a pressure retention test at 10MPa, ensuring zero leakage. The assembly also includes a vibration-damping bracket at the cab-engine interface, reducing pipe movement from road vibrations and preventing seal wear over time. This leak-proof design eliminates refrigerant loss (which degrades AC performance) and avoids costly compressor repairs

Designed to endure the contrasting conditions of the cab (humidity, temperature swings) and engine bay (heat, oil mist, debris), the pipe assembly features a comprehensive protective system. The aluminum pipe undergoes a chromate conversion coating (10μm) for base corrosion resistance, followed by a high-temperature epoxy-polyester powder coating (100μm) that resists scratches, oil, and UV radiation. This coating system passes 1200-hour salt spray testing (per ASTM B117) with no red rust, ensuring durability in coastal areas or winter roads with deicing salt. The cab-mounted section is wrapped in closed-cell EPDM foam insulation, preventing condensation (which can damage cab electronics) and minimizing heat gain from the cab interior. All metal fittings are zinc-nickel plated (12μm thickness) to prevent rust, and the assembly is tested for resistance to engine coolant, cleaning chemicals, and diesel spills—guaranteeing a service life of over 8 years

Designed for efficient installation across cab and engine bay, the pipe assembly undergoes CNC bending and precision machining to achieve strict dimensional accuracy (length tolerance: ±1.5mm, bend angle tolerance: ±0.8°). Pre-formed bends and fixed length eliminate on-site pipe modification, while fittings are pre-lubricated with refrigerant-compatible grease for smooth connection. The package includes 2 stainless steel lock nuts, 4 spring washers, a tube of high-temperature thread sealant (matching Dongfeng Xinjiang’s OE specification), and 4 nylon mounting clips (compatible with the cab frame’s pre-drilled holes). Installation steps are straightforward: route the pipe through the cab’s pre-cut access grommet, align fittings with the evaporator and compressor ports, hand-tighten lock nuts, then torque to 30-32N·m with a standard torque wrench. No specialized tools (e.g., pipe benders or flaring tools) are required, and a professional technician can complete installation in 30 minutes or less—reducing labor costs and minimizing truck downtime for commercial operators