G3 GL Frame Replaceable Panel Pre-Air Filter - China Suppliers & Factory | Efficient Synthetic Fiber Filter
The filter media is the part that actually performs the filtration. Common types include:
Metal Mesh
Characteristics: Typically aluminum or stainless steel mesh; washable, reusable, with good durability.
Used in situations requiring higher standards and reusable, but the cost is higher than that of paper media.
Synthetic Fiber
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.
Glass Fiber
Characteristics: Now less commonly used in primary filters and more frequently used in medium-efficiency filters. It offers stable performance but is relatively brittle.
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.
Replaceable pre-filters are widely used in clean rooms, commercial and industrial air conditioning systems, central air conditioning units, and other ventilation-related industries where air quality and dust control are important.
The three main types of filter media are metal mesh (aluminum or stainless steel, washable and reusable), synthetic fiber (polyester non-woven fabric, most common and cost-effective), and glass fiber (stable performance but less common in primary filters).
Replaceable pre-filters offer a filtration efficiency range of 40% to 90%, allowing users to select the appropriate level based on their specific application requirements and economic considerations.
Higher air velocity increases filter resistance. By increasing the surface area of the filter media, the air velocity passing through is reduced, which in turn lowers resistance. Choosing the right face velocity is essential to balance efficiency, resistance, and operating cost.
A filter should be replaced when accumulated dust causes resistance to reach an unreasonable level, or when excessive resistance risks dislodging previously captured dust back into the airflow, which could compromise downstream air quality.
Yes, custom sizes are supported to meet specific installation and system requirements. Additionally, the initial resistance of the filters carries a tolerance of ±10%, which should be considered during system design and selection.