Hot air hopper dryer is the mechanical equipment that makes the wet content of the material (generally refers to water or other volatile liquid components) vaporize and escape by heating, so as to obtain the solid material with specified wet content. The advantages of air dryers installed on trucks, dry compressed air, completely remove water and oil in the air of the compressed air system of Volvo car parts. So as to ensure the air in the trachea quickly and dry; It has the functions of antifreeze valve, oil-water separator, high pressure controller, wet air cylinder and automatic water discharge valve. No need to use the above products after using the air dryer; Improve system reliability; Prolong the system life. The impact of not installing air dryer on the vehicle: water in the pipeline, resulting in rust of the pipeline and air storage cylinder; Rust particles and impurities with the brake gas into the brake valve, adhesion on the valve lead to leakage and premature failure; Wet air corrodes the internal components of the brake valve, and the product assembly fails prematurely; It directly affects the braking performance of the vehicle, and there are many safety hazards.