Pocket Filters
In HVAC (Heating, Ventilation, and Air Conditioning) systems, pocket filters are widely used for supply, exhaust, and recirculated air filtration, suitable for various industrial processes such as metal processing, paper production, food and beverage, etc.
Material Selection:Pocket filters can be constructed with either plastic or metal frames, and the specific choice depends on factors such as humidity and other conditions in the application environment.
Structural Design:Choosing versions with self-supporting pockets, stabilizers, separator protector can effectively prevent pocket deformation, thereby ensuring a low pressure drop.
Application Areas:Different application areas have different requirements for filters. For example, synthetic pocket filters rated G4 to F9 are commonly used in HVAC systems, retail, education, leisure, restaurants, kitchens, hotels, and residential settings.
The materials primarily include the following types
- Synthetic Fiber
This is the most common filter media materials, including polyester (PES), polypropylene (PP), and melt-blown polypropylene, among others. These materials are typically used to manufacture high-efficiency filters capable of capturing tiny particulate matter. - Glass Fiber
Some pocket filters also utilize glass fiber as the filter media, especially in applications requiring high filtration efficiency. Glass fiber materials can provide higher and more stable filtration performance. - Non-woven Material
These include needle-punched felt and composite melt-blown filtration materials. These materials exhibit good filtration performance and durability, suitable for a wide range of application environments. - Special Materials
Such as aramid fibers and PTFE felt, these materials are suitable for specific chemical environments.
Filter Rating
- Different grades of pocket filters are suitable for different air quality and cleanliness requirements. For example, pocket filters rated G3 and G4 are typically used for pre-filtration in harsh environments with high dust loads, while pocket filters rated F5 to F9 are suitable for higher air cleanliness requirements.
Testing and Evaluation Methods
To reliably determine the quality and efficiency of filter elements, in addition to total permeability, it is necessary to test energy consumption (pressure drop), loading, and particle separation efficiency.
Size Selection
- For filters rated G3 and G4, pocket filters with a length of 381mm are recommended.
- For filters rated F5 to F9, pocket filters with a length of 534mm or 610mm are recommended.
- The choice of pocket depth is also crucial, with common depths including 305mm, 380mm, 534mm, and 610mm.
Technical Parameters
| Actual Dimension (mm) (W×H×D) | Number of pockets | Rated Air Volume | Rated Initial Resistance M5 | Rated Initial Resistance M6 | Rated Initial Resistance F7 | Rated Initial Resistance F8 |
|---|---|---|---|---|---|---|
| 592×592×534 | 10 | 3400 | 85 | 95 | 115 | 140 |
| 490×592×534 | 8 | 2800 | 85 | 95 | 115 | 140 |
| 287×592×534 | 5 | 1700 | 85 | 95 | 115 | 140 |
| 490×490×534 | 8 | 2300 | 85 | 95 | 115 | 140 |
Special sizes are available upon request.
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