G3 GL Frame Replaceable Panel Pre-Air Filter - China Suppliers and Factory for High-Efficiency Air Filtration
Replaceable Pre-filters are widely used in Clean Rooms, commercial and industrial air conditioning and ventilation systems, central air conditioning, and other related industries.
The filter media is the part that actually performs the filtration. Common types include:
Characteristics: Typically aluminum or stainless steel mesh; washable, reusable, with good durability.
Used in situations requiring higher standards and reusability, but the cost is higher than that of paper media.
Characteristics: This is currently the most mainstream and common filter media. It is usually a non-woven fabric made from polyester fiber.
Advantages: The fibers are fluffy with uniform gaps, providing high dust-holding capacity; relatively low resistance; possesses a certain stiffness, allowing it to be self-supporting (used with a cross-sectional design, see the structure section below).
Form: The surface is usually pleated to create an uneven texture, increasing the filtration area and reducing resistance.
Characteristics: Now less commonly used in primary filters and more frequently used in medium-efficiency filters. It offers stable performance but is relatively brittle.
The efficiency of currently available primary efficiency filters ranges from 40% to 90%, and they can be selected based on specific requirements. The rational selection of filter efficiency and face velocity contributes to comprehensive economic benefits.
For filters made of the same material, higher efficiency typically results in greater resistance and higher cost, while lower efficiency leads to reduced resistance and cost. Altering the air velocity will also affect resistance, efficiency, and the number of filters required, so appropriate selection should be made according to specific conditions.
As dust accumulates on the filter media, the resistance increases. When the resistance reaches an unreasonable level, the filter must be discarded. Sometimes, excessive resistance can cause previously captured dust to become dislodged and re-enter the airflow; when this risk arises, the filter should also be replaced.
The resistance of a filter increases with higher airflow rates. By increasing the surface area of the filter media, the relative velocity of air passing through the filter can be reduced, thereby decreasing the resistance.
