EV Charging Stations
Filtration for Power Equipment
Cleanroom & Semiconductor
Ultra-High Cleanliness Filtration
Commercial HVAC
Central Air System Filtration
Data Centers
Precision Equipment Protection
Livestock & Farming
Farming Environment Purification
Spray Booths & Industrial Dust
Paint Mist & Dust Purification
Filtration for Power Equipment
Professional air filtration for EV charging devices, protecting against dust and sand ingress to ensure stable, reliable operation of charging piles and station infrastructure.
View Related Products →Ultra-High Cleanliness Filtration
Ultra-high efficiency filtration for semiconductor wafer fabs and precision electronics cleanrooms, capturing nano-scale particles to meet ISO Class 1–3 standards and maximize product yield.
View Related Products →Central Air System Filtration
High-efficiency filtration for commercial building HVAC systems, improving indoor air quality, reducing energy consumption, and extending equipment service life.
View Related Products →Precision Equipment Protection
Precision air filtration for data centers, shielding servers and critical hardware from dust contamination to keep cooling systems running efficiently and reliably.
View Related Products →Farming Environment Purification
Dedicated filtration systems for farms and livestock facilities — capturing dust, adsorbing ammonia, and inhibiting pathogen spread to improve animal health and overall productivity.
View Related Products →Paint Mist & Dust Purification
Designed for spray booths and grinding workshops, efficiently capturing paint mist, metal dust, and wood chips to meet emission standards while protecting finished surface quality.
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Pre-Filter (G1–G4)
First-Stage Large-Particle Capture
Medium-Efficiency Filter (F5–F9)
Precise PM2.5 Capture
HEPA High-Efficiency Filter
Sterile-Grade Purification
ULPA Ultra-High Efficiency Filter
Sub-Micron Particle Capture
First-Stage Large-Particle Capture
The first line of defense, capturing particles ≥5 μm such as dust, hair, and fibers to protect downstream filters and extend overall system service life.
View Related Products →Precise PM2.5 Capture
Captures fine particles of 1–5 μm including PM2.5, pollen, and mold spores, significantly improving indoor air quality for commercial HVAC and ventilation systems.
View Related Products →Sterile-Grade Purification
≥99.97% filtration efficiency for particles ≥0.3 μm, delivering sterile-grade clean air widely used in medical, pharmaceutical, and electronics manufacturing.
View Related Products →Sub-Micron Particle Capture
≥99.9995% efficiency for particles ≥0.12 μm, meeting the extreme cleanliness demands of semiconductor fabs, aerospace, and other ultra-precision applications.
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High-Temperature Resistant
Industrial-Grade Heat Tolerance
Washable & Reusable
Cut Costs, Reduce Waste
Activated Carbon
Odor & Harmful Gas Removal
Bag Filter
High Dust-Holding, Long Life
Panel / Pleated Filter
Compact Space-Saving Design
Low-Resistance Airflow
Energy-Saving Operation
Industrial-Grade Heat Tolerance
Built with specialized heat-resistant materials, operating stably up to 250°C for paint ovens, industrial dryers, and high-temperature process environments.
View Related Products →Cut Costs, Reduce Waste
Cleanable by water washing or air blowing, reusable multiple times to significantly reduce replacement frequency and O&M costs — an economical, eco-friendly choice.
View Related Products →Odor & Harmful Gas Removal
Leverages activated carbon's high adsorption capacity to eliminate odors, VOCs, and formaldehyde, ideal for newly renovated spaces and industrial exhaust treatment.
View Related Products →High Dust-Holding, Long Life
Bag-style construction delivers a larger filtration area, high dust-holding capacity, and extended service life — ideal for high-dust environments with reduced replacement frequency.
View Related Products →Compact Space-Saving Design
Compact form factor for easy installation and replacement; pleated structure maximizes filtration area within a small footprint for higher efficiency.
View Related Products →Energy-Saving Operation
Low-resistance design minimizes pressure drop while maintaining filtration performance, reducing fan energy consumption for cost-effective, eco-friendly operation.
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F9 Medium Efficiency Bag Air Filter
Medium Efficiency,Bag,F7F8F9
An F9 bag filter is the last medium-efficiency stage before HEPA. It sits behind the coarse pre-filter and ahead of the terminal filter, so it carries the fine dust that would otherwise reach the HEPA stage; by this point the visible fraction is already gone and what is left is the fraction that loads a final filter fastest. F9 is rated 95% to 99%, which is why it is the grade written into a cleanroom classification or a sterile production area rather than chosen on budget alone.
The construction is what lets a pocket element hold that grade without a large pressure penalty. The media is sewn into pockets that hang into the airflow, so the velocity through the fibre stays low even at rated volume, where a flat pad of the same face area would work much harder for the same airflow. Pocket count and depth are then the selection variables — three, six or eight pockets on a 287 by 592 or 592 by 592 face — and because F7, F8 and F9 share one frame size, a system can move up a grade later without changing the holding frame.
Product Features
Key Specifications
Ideal Environments
High-grade Cleanrooms
Ultra-clean Environments
Biopharmaceutical Sterile Areas
Semiconductor Fabrication
Electronics Manufacturing
Hospital Operating Theatres
HVAC Fresh Air Units
High-grade Cleanrooms
Ultra-clean Environments
Biopharmaceutical Sterile Areas
Semiconductor Fabrication
Electronics Manufacturing
Hospital Operating Theatres
HVAC Fresh Air Units
Technical Parameter
| Model | Filtration Grade | Dimensions (W×H×D mm) | Pockets | Media Area (m²) | Initial Resistance (Pa) | Final Resistance (Pa) | Rated Air Flow (m³/h) |
|---|---|---|---|---|---|---|---|
| WS-F7-BG | F7 | 287*592*550 | 3 | 2.80 | 90 | 400 | 1700 |
| WS-F7-BG | F7 | 592*592*550 | 6 | 3.86 | 100 | 400 | 2800 |
| WS-F7-BG | F7 | 592*592*600 | 8 | 5.68 | 100 | 400 | 3400 |
| WS-F8-BG | F8 | 287*592*550 | 3 | 2.80 | 115 | 450 | 1700 |
| WS-F8-BG | F8 | 592*592*550 | 6 | 3.86 | 120 | 450 | 2800 |
| WS-F8-BG | F8 | 592*592*600 | 8 | 5.68 | 120 | 450 | 3400 |
| WS-F9-BG | F9 | 287*592*550 | 3 | 2.80 | 125 | 450 | 1700 |
| WS-F9-BG | F9 | 592*592*550 | 6 | 3.86 | 130 | 450 | 2800 |
| WS-F9-BG | F9 | 592*592*600 | 8 | 5.68 | 130 | 450 | 3400 |
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Our Commitment
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Quality Assurance
We have a robust quality and reliability assurance system spanning R&D to mass production. Our well-equipped laboratories and analytical instruments support chemical/raw material testing, failure analysis, yield improvement, reliability verification, and equipment calibration, ensuring consistent product quality and flexible customer satisfaction.
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Service Guarantee
We provide comprehensive after-sales support: our professional team stands ready to assist with any product issues or technical challenges. Upon receiving customer inquiries, we respond promptly to deliver optimal solutions, minimizing downtime and ensuring rapid resumption of your operations. Guided by a customer-centric approach, we continuously refine our service system to elevate overall service standards based on feedback and needs.
Our Materials and Craftsmanship
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Modernized Factory
Whalesens Technology’s modern factory features digital management, IoT-monitored automated lines for full-process control, and a Class 100,000 cleanroom for precision filter processing.
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Stringent Process Workflow
20+ precise inspections, CNC folding (error < 0.1mm) and extreme-condition validation ensure zero-defect, high-quality filters.
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Advanced and Reliable Materials
whalesens’s cartridges feature self-developed nano-glass fiber membranes (99.99% PM0.3 filtration, 15% lower resistance vs. imports) and key material autonomy—showcasing manufacturing strength.
About Us
