498 series air source treatment triple product features: The triple is composed of three parts: air filter, air pressure reducing valve and lubricator. The air filter uses cyclone blades to separate moisture and impurities, and retains dust through micropores. The water storage cup is made of transparent polycarbonate, which can clearly observe the amount of accumulated water. The air pressure reducing valve is an overflow diaphragm type air pressure reducing valve, which directly relies on the