Answer: The filter element design of the coalescing filter will set a porous foam layer or cover inside and outside the filter layer.
When the oil-containing airflow flows radially into the flexible inner porous foam sleeve layer through the action of the filter center layer, it acts as a disperser, pre-filter and spatial stabilizer for the airflow on the one hand; on the other hand, it changes the airflow (expansion or contraction) by adjusting itself, so that the airflow exerts a gentle pressure on the filter layer, ensuring that it works completely and effectively.
When the airflow passes through the filter layer, the oil droplets are intercepted and collected. After the oil gathers, it flows to the outer porous foam cover (covered outside the metal tube) through a layer of hard metal pipe. The outer porous foam cover has a large non-absorbent surface, which allows the oil to quickly cover its surface and flow to the bottom under the action of gravity, thereby preventing the oil from returning to the airflow. When the oil accumulates at the bottom of the cover (no airflow dead zone), the foam holes are blocked and the oil falls into the collection tank.
