Primary Pocket Filter | Large Air Flow G4 Bag Filter for Commercial AHU
Engineered for high-volume ventilation systems, our Primary Pocket Filter handles a massive rated air flow of up to 4000m³/h. This multi-pocket filter is widely applied to ventilation systems as medium filtration, featuring a robust 8-pocket design (595x595mm) to ensure maximum dust holding capacity. With an initial resistance of 70Pa, it delivers reliable G4 efficiency (35-45%) for capturing atmospheric dust in commercial HVAC systems and large industrial plants.
Product Key Features
Optimized Bag Count: Available in 5, 6, or 8 pockets to balance air velocity and filtration surface area.
High Velocity Performance: Rated for large air flow up to 4000m³/h, maintaining system stability.
Standard Header: Features a rigid Aluminum alloy frame or galvanized steel frame for seamless HVAC integration.
Durable Sealing: Equipped with an EVA gasket to ensure 100% leak-proof installation.
Material & Craftsmanship
Media: High-density needle punched filter media or blue and white pre-filter media.
Sealing: Premium EVA Gasket for secure housing fit.
Frame: Lightweight Aluminum Alloy or durable Galvanized Steel.
Applications
High-Traffic Infrastructure (Airports & Stations)
Focus: Massive air exchange.Benefit: Maintains superior IAQ in high-ceiling, crowded spaces during peak hours.
Industrial & Cleanroom Pre-filtration
Focus: Protection of high-end filters.Benefit: Captures heavy dust loads, extending HEPA filter life by up to 50%.
Premium Commercial HVAC
Focus: Energy efficiency.Benefit: Low-resistance design significantly reduces fan power consumption and utility bills.
Heavy-Duty Industrial Environments
Focus: Structural durability.Benefit: Rigid 8-pocket design prevents bag collapse or bursting under extreme air pressure.
Competitive Comparison
| Feature | Standard 4-6 Pocket Filters | Our High-Capacity 8-Pocket Filter |
| Filtration Area | Limited surface leads to rapid clogging. | 30% Larger Surface Area for superior dust holding. |
| Airflow Velocity | High face velocity risks particle blow-through. | Lower Face Velocity at 4000m³/h, ensuring stable G4 efficiency. |
| Initial Resistance | Higher (85-110 Pa), increasing energy load. | Ultra-Low (70 Pa), optimizing fan efficiency. |
| Service Life | Frequent replacements (every 2-3 months). | Extended Cycle (4-6 months), reducing maintenance labor. |
| Structural Integrity | Bag sagging reduces effective area. | Reinforced V-Shape Pockets maintain shape under high pressure. |
Specifications
| Size / WxHxD (mm) | Airflow Capacity (m3/h) | Initial Pressure Drop (Pa) | Filter Class (e.g., G4) (class) | Filter Color
| Pockets / Bags
|
| 495×295×500mm | 1500m3/h | 70Pa
| 25-35% G3
35-45% G4 | White | 5 |
| 495×495×500mm | 2500m3/h | 5 | |||
| 595×295×500mm | 2000m3/h | 6 | |||
| 595×495×500mm | 3200m3/h | 6 | |||
| 595×595×500mm | 3800m3/h | 8 | |||
| 495×295×600mm | 1800m3/h | 5 | |||
| 495×495×600mm | 3200m3/h | 5 | |||
| 595×295×600mm | 2500m3/h | 6 | |||
| 595×495×600mm | 4000m3/h | 6 | |||
| 595×595×600mm | 4500m3/h | 8 |
As a leading manufacturer specialized in high-capacity HVAC filtration, we combine factory-direct pricing with ISO-certified quality to deliver high-performance solutions. By utilizing premium needle-punched media and automated precision sealing, we ensure every 8-pocket filter meets strict G4 efficiency and 4000m³/h airflow standards. With robust OEM/ODM capabilities and a fast global supply chain, we provide reliable, energy-saving filters tailored to maximize your system’s lifespan and minimize maintenance costs.
Frequently Asked Questions
Q1: What are the advantages of an 8-pocket design compared to a 6-pocket one?
A: The 8-pocket structure increases the effective filtration surface area by approximately 30%. This results in a lower initial resistance, a higher dust-holding capacity, and a longer service life, making it ideal for systems requiring a large airflow of 4000m³/h.
Q2: Can I customize the frame material and dimensions?
A: Yes. We offer flexible OEM/ODM services. You can choose between a lightweight Aluminum Alloy frame, durable Galvanized Steel, or Plastic. Dimensions and the number of pockets can also be customized to fit your specific AHU (Air Handling Unit).
Q3: How often should I replace the G4 Primary Pocket Filter?
A: Typically, we recommend replacement every 3 to 6 months, depending on your local air quality and system load. Replacing the filter when the resistance reaches 250Pa ensures optimal airflow and protects your downstream HEPA filters.
Q4: Does the filter come with a gasket to prevent air leakage?
A: Absolutely. Our filters come standard with a high-quality EVA gasket on the header. This ensures a 100% leak-proof seal between the filter and the housing, preventing unfiltered air from bypassing the system.
Q5: What is your standard lead time for bulk international orders?
A: For standard sizes, our lead time is typically 7–15 days. As a factory-direct supplier, we maintain a steady stock of raw materials to ensure fast turnaround times for large-scale commercial and industrial projects.
