This air compressor is the core air supply component of the vehicle pneumatic braking system for FAW Jiefang J7 heavy truck. Driven by the engine, it compresses air and stores compressed air in the air reservoir to provide stable air source for air brake, air horn and other pneumatic equipment. It adopts high-precision moving parts and cast iron housing. It maintains stable air output under high temperature and long-time continuous operation in heavy-duty long-haul conditions. Every air compressor undergoes air tightness test, performance calibration and dynamic inspection before delivery. It solves common faults such as insufficient air pressure, slow air charging and abnormal noise, serving as an essential replacement spare part for pneumatic system overhaul.