G3/G4 MERV 5-8 Synthetic Pocket Pre Filter | Energy-Efficient Bag Pre Filter
High-Capacity Primary Filtration: Our progressive-density multi-bag design delivers an expansive surface area, creating a G4 MERV 8 bag filter with exceptional dust holding capacity that significantly extends operational lifespans compared to standard panel pre-filters.
Energy-Efficient Airflow: Engineered for low pressure drop (optimized 70Pa initial resistance), this synthetic pocket pre filter allows high-volume airflow with minimal drag, slashing fan motor energy consumption in AHU pocket pre filter installations and HVAC systems.
100% Washable & Reusable: Manufactured with high-strength synthetic fibers, our washable pocket pre filter withstands multiple cleaning cycles without fiber shedding, delivering a sustainable, low-maintenance solution for demanding industrial facilities.
Structural Stability & Rigidity: Built with heavy-duty aluminum header or galvanized frame bag pre filter options, the internal pocket stays prevent bag adhesion and seam leakage even under turbulent, high-CFM spray booth or turbine intake pressures.
Custom Bag Pre Filter Manufacturing & OEM/ODM Solutions
Dimensions & Pocket Counts: Fully scalable sizing options with flexible pocket counts (3 to 8 pockets) and depth dimensions tailored to fit custom AHU pre-filter frames and holding bank assemblies.
Media & Standard Customization: Precision-engineered progressive-density media options compliant with ISO coarse bag filter requirements (ISO Coarse 60%–85%) and EN779 specifications, built to handle up to 80°C and 80% RH operating environments.
Frame & Hardware Selection: Corrosion-resistant aluminum header or heavy-duty galvanized steel outer casings, equipped with continuous perimeter gaskets for leak-free primary pocket filter installation.
OEM/ODM & Wholesale Production: Backed by 20+ years of direct factory capability, CHUQI provides custom private labeling, branded packaging, and rapid pre filter bag sample dispatch for global distributor partners.
Industrial Bag Pre Filter Applications & Usage Scenarios
Commercial & Industrial HVAC: Serves as the high-efficiency pre-filtration stage for AHU air handling unit pocket pre filter assemblies in shopping malls, hospitals, and commercial buildings.
Paint Spray Booths & Coating Lines: Functions as a heavy-duty spray booth intake bag pre filter barrier, capturing fine airborne dust to ensure flawless automotive and industrial surface finishing.
Cleanrooms & Pharmaceutical Facilities: Delivers reliable cleanroom HVAC primary bag filter protection, safeguarding downstream HEPA/ULPA systems in semiconductor and biotech processing.
Industrial Ventilation & Workshops: Extends system uptime in factory exhaust air pocket pre filter and general manufacturing ventilation networks by capturing heavy dust loadings.
Power Generation & Turbine Intakes: Acts as a high-capacity gas turbine air intake bag pre filter solution, protecting compressors and turbines from particulate wear in high-airflow environments.
Why Choose CHUQI Synthetic Pocket Pre Filters: Quality Comparison
| Comparison Dimension | Our Factory Direct Product | Standard Market Alternatives |
|---|---|---|
| Compliance & Quality | Full adherence to EN779/ISO 16890 standards with rigorous batch-level quality control. | Frequently lacks formal filtration certifications, leading to unpredictable system performance and project failure. |
| Filtration Stability | High-density progressive structure prevents fiber shedding and prevents secondary contamination of downstream systems. | Cheap, non-graded media often suffers from fiber breakage under high wind speeds, causing downstream particulate pollution. |
| Bulk Supply Capacity | Large-scale automated production ensures consistent supply and rapid turnaround for massive engineering and wholesale orders. | Smaller workshops lack capacity for large-batch consistency, leading to significant quality variances between shipments. |
| Build & Durability | Rugged industrial frames with multi-point support ribs withstand 120% rated airflow without deformation or leakage. | Flimsy frames prone to sagging, leading to air bypass (leaks) that drastically lowers total system filtration efficiency. |
| Wind Resistance Performance | Ultra-low initial resistance (70Pa) minimizes energy loss, directly addressing high electricity cost concerns for facility owners. | High static pressure design forces AHU fans to operate at higher speeds, leading to excessive energy waste and equipment strain. |
| Customization Ability | Professional R&D team provides deep customization for non-standard bag dimensions, pocket configurations, and frame materials. | Generally limited to off-the-shelf, standard sizes, failing to meet the requirements of non-standard or legacy equipment rails. |
G3 G4 Synthetic Pocket Pre Filter Technical Specifications
| Size / WxHxD (mm) | Airflow Capacity (m3/h) | Initial Pressure Drop (Pa) | Filter Class (e.g., G4) | 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 |
Note: These are standard specifications. For custom sizes or technical inquiries, 【please contact our engineering team.】
Discover Other Specifications in Our Pocket Pre Filter Series
As a leading primary bag pre filter manufacturer with 20+ years of direct manufacturing excellence, CHUQI optimizes vertical production to support global HVAC pocket pre filter wholesale distribution and large-scale engineering projects. Our automated facility integrates precision media compounding and rigid frame assembly, delivering reliable batch-to-batch consistency for all G3/G4 synthetic pocket air filter requirements.
We adhere strictly to international testing standards, producing export-ready filter units built for demanding, high-humidity, and elevated-temperature operating environments. Beyond standard production, our engineering team offers complete OEM/ODM support for custom size bag filter configurations. Every high capacity air filter bag we manufacture is engineered to minimize system pressure drop, reduce energy consumption, and lower total operational costs for global B2B buyers.
Q1: What is the primary operational role of a synthetic pocket pre filter in commercial air handling systems?
A1: A synthetic pocket pre filter acts as the initial protective barrier in multi-stage HVAC configurations. Engineered with progressive-density media, it captures coarse ambient particulates (5μm and larger)—such as dust, pollen, and airborne lint—preventing rapid loading of secondary medium-efficiency or downstream HEPA filters and optimizing overall fan energy consumption.
Q2: How do G4 and MERV 8 efficiency classifications compare for a G4 MERV 8 bag filter?
A2: G4 (defined under EN779 / ISO 16890 ISO Coarse) and MERV 8 (under ASHRAE 52.2) represent equivalent primary filtration performance thresholds. A G4 MERV 8 bag filter delivers an average arrestance of 85% to 90% for coarse particulates while maintaining low initial pressure drop (typically 70 Pa or lower), making it ideal for AHU fresh-air intakes and industrial ventilation baselines.
Q3: Under what operating conditions can a washable bag pre filter be cleaned and re-serviced?
A3: A high-tenacity washable bag pre filter constructed with ultrasonically welded synthetic media withstands periodic dry compressed-air blowdowns or low-pressure liquid rinsing. This capability is specifically designed for high-dust industrial environments, allowing operators to restore airflow capacity and extend filter service life without structural seam failure or fiber shedding.
Q4: What technical indicators signal the need to replace an AHU pocket pre filter?
A4: An AHU pocket pre filter should be replaced when static pressure differential reaches its design final resistance (typically 200–250 Pa), or when inspection reveals physical media loading limits. Operating beyond recommended final pressure differential increases system drag, elevates fan motor energy draw, and risks bypass airflow around header gaskets.
Q5: What mechanical advantages does a primary pocket filter offer over standard flat or pleated panel pre-filters?
A5: A primary pocket filter utilizes a multi-bag volumetric design that vastly expands effective filtration surface area within the same face dimensions. This multi-pocket structure distributes dust loading across deep pockets, providing significantly higher dust holding capacity (DHC), reduced face velocity strain, and longer service intervals compared to conventional panel pre-filters.
