Dongfeng xinjiang truck parts Connect the evaporator and compressor air conditioning pipe assembly 8108030-KDS601Y

Built to support the AC system’s low-pressure phase (refrigerant return from evaporator to compressor), this pipe assembly features a design optimized for vapor-phase refrigerant flow. The 6061-T6 aluminum pipe’s inner diameter (18mm) is sized to maintain optimal refrigerant velocity (0.8-1.1m/s)—critical for preventing liquid refrigerant from entering the compressor (a leading cause of compressor damage). The inner surface is polished to a roughness of ≤0.6μm, reducing flow resistance and ensuring consistent suction pressure for the compressor. The pre-formed bends have a minimum radius of 40mm, avoiding constriction that could cause pressure drops or vapor turbulence. Additionally, the pipe’s length is matched to the truck’s wheelbase (e.g., 3.8m for X7 short-wheelbase models), ensuring proper refrigerant residence time in the evaporator. This optimization enhances cooling efficiency, allowing the AC system to maintain cab temperatures 2-3℃ lower than generic pipes under the same conditions

Engineered to withstand the AC system’s low-pressure demands (working pressure: 2-6MPa) and prevent refrigerant leaks, the pipe assembly delivers robust performance. The 6061-T6 aluminum pipe (wall thickness: 2mm) has a burst pressure rating of 25MPa—far exceeding the low-pressure loop’s maximum operating pressure. The flared O-ring fittings are equipped with fluororubber (FKM) seals, which offer superior resistance to refrigerant, oil, and temperature fluctuations (-40℃ to 200℃) compared to standard rubber seals. Each fitting undergoes a 24-hour vacuum leak test (down to 50mbar) during production, ensuring zero leakage. The assembly also includes a vibration-damping clamp at the cab-engine bay transition point, reducing pipe movement from road vibrations and preventing seal wear. This leak-proof design eliminates refrigerant loss (a major cause of AC inefficiency) and avoids costly compressor repairs

Designed to endure the dual environments of the cab (humidity, temperature changes) and engine bay (heat, oil mist, debris), the pipe assembly features a multi-layer protective system. The aluminum pipe undergoes a chromate conversion coating (8μm) for base corrosion resistance, followed by a two-part epoxy paint (90μm) that resists scratches, oil, and UV radiation. This coating system passes 1000-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 foam insulation, preventing condensation (which can damage cab electronics) and minimizing heat gain from the cab interior. All metal fittings are zinc-nickel plated (10μm thickness) to prevent rust, and the assembly is tested for resistance to engine coolant and cleaning chemicals—guaranteeing a service life of over 7 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: ±2mm, bend angle tolerance: ±1°). The pre-formed bends and fixed length eliminate on-site pipe modification, while the fittings are pre-lubricated with refrigerant-compatible grease for smooth connection. The package includes 2 stainless steel lock nuts, 4 flat washers, a tube of thread sealant (matching Dongfeng Xinjiang’s OE specification), and 3 mounting clips for securing the pipe to the cab frame. Installation steps are straightforward: route the pipe through the cab’s pre-drilled access hole, align fittings with the evaporator and compressor ports, hand-tighten lock nuts, then torque to 28-30N·m with a torque wrench. No specialized tools (e.g., pipe benders) are required, and a professional technician can complete installation in 35 minutes or less—reducing labor costs and minimizing truck downtime for commercial operators