Why are the colors of various types of medium-efficiency bag filters different?

Why are the colors of various types of medium-efficiency bag filters different?

   The medium-efficiency bag filter is used as the front-end filtration of the high-efficiency filter to reduce the load of the high-efficiency air filter and extend its service life. In the filtration system, this product has a large windward area, so it has a large dust-holding capacity. The wind speed is low and it is considered to be the best medium-efficiency filter structure at present. It is often used in central air-conditioning ventilation systems, pharmaceuticals, hospitals, electronics, food, and other industrial purifications. The colors of the efficiency bag filters we see every day are different. What do the colors represent?
    Why do we see bag filters in different colors? What does the color of the medium-efficiency bag filter mean? The color of the bag filter represents its efficiency. The colors are white, green, pink, light yellow, and white. Efficiency ranges from F5 to F9. We can see the corresponding efficiency from the color. The following are the colors corresponding to efficiency F5-F9:
F5 (EN 799), 40-60% (white);
F6 (EN 779), 60-70% (green);
F7 (EN 779), 75-85% (pink);
F8 (EN 779), 85-95% (light yellow);
F9 (EN 779), 99% (white);
    The medium-efficiency bag filter has a wide range of colors, which means complete efficiency. At the same time, special sizes and specifications can be made according to customer requirements. The outer frame has a galvanized frame and an aluminum alloy frame. The conventional outer frame thickness: is 21mm 25mm. The above are medium-efficiency bag filters. The color and efficiency of the device are introduced. For more product knowledge, please pay attention to bacclean Purification.