Technical Analysis of High-Capacity V-Shaped Air Filters (Plastic Frame + Densely Pleated Fiberglass Filter Paper)
I. Core Design Features
1. Advantages of V-Shaped Structure
Increased Filtration Area: The V-shaped pleated design expands the filter media surface area by 2–3 times (e.g., effective filtration area per filter element reaches 6–10 m²), significantly reducing air velocity per unit area and lowering resistance by 30%–50% compared to flat-panel filters.
High Space Utilization: Under the same installation dimensions, the V-shaped structure accommodates more filter media, making it ideal for compact equipment (e.g., FFU fan filter units, cleanroom ceiling modules).
2. Densely Pleated Fiberglass Filter Paper (H13–U17 Grade)
High-Efficiency Particle Capture: Manufactured via wet-laid processes using ultrafine glass fibers (diameter 0.5–2 μm), the filter paper achieves a porosity as low as 90%–95% and a filtration efficiency of ≥99.97% for 0.3 μm particles (H13 grade), suitable for ISO 5 (Class 100) cleanrooms.
Large Dust-Holding Capacity: The dense structure combined with gradient density design (higher density on the windward side, lower on the leeward side) enables a dust-holding capacity of 400–600 g/m² per filtration cycle, extending service life by over 50% compared to standard filters.
3. Plastic Frame Design
Lightweight and Corrosion-Resistant: Utilizing ABS or polypropylene (PP) frames, the weight is reduced by 40% compared to metal frames, with resistance to acid/alkali corrosion, making it suitable for high-humidity or chemically contaminated environments.
Strong Sealing Performance: Integrated rubber gaskets within the frame, coupled with ultrasonic welding or mechanical compression bonding to the filter element, ensure an air leakage rate of ≤0.01%, meeting cleanroom positive pressure requirements.
II. Performance Parameter Comparison
| Metric | Traditional Flat-Panel Filter | V-Shaped Fiberglass Filter (Plastic Frame) | Improvement Ratio |
|---|---|---|---|
| Filtration Area (m²) | 2.0 | 8.0 | 300% |
| Initial Resistance (Pa) | 80 | 45 | -44% |
| Dust-Holding Capacity (g/m²) | 200 | 500 | 150% |
| Replacement Cycle (Months) | 3 | 6–8 | 100%–167% |
| Applicable Air Velocity (m/s) | 0.25 | 0.5–0.8 | 100%–220% |
III. Application Scenarios and Advantages
1. Industrial Cleanrooms
Semiconductor Manufacturing: In wafer dicing and lithography processes, continuous filtration of 0.1 μm-class particles is required. The V-shaped filter's high-efficiency, low-resistance design reduces HVAC system energy consumption by 15%–20%.
Biopharmaceuticals: Paired with HEPA terminal filters, it achieves gradient filtration in Grade A clean zones (ISO 4), preventing cross-contamination.
2. Commercial Building Ventilation
Hospital Operating Rooms: Dual-layer V-shaped filters (pre-filter + HEPA) maintain positive pressure while achieving 99.995% filtration efficiency (U16 grade), reducing postoperative infection risks.
Data Centers: The large dust-holding capacity reduces filter replacement frequency, ensuring year-round fault-free operation of server cooling systems.
3. Special Environments
High Temperature/Humidity: Fiberglass filter paper withstands temperatures up to 180°C, while the plastic frame withstands 80°C, suitable for humid environments in food processing plants.
Explosion-Proof Requirements: The plastic frame eliminates metal spark risks, complying with ATEX standards for chemical workshops.
IV. Maintenance and Cost Optimization
1. Quick-Replacement Design
Snap-on connections between the filter element and frame reduce replacement time from 30 minutes to 5 minutes, lowering labor costs.
2. Total Cost of Ownership (TCO)
Energy Savings: For a 1,000 m³/h airflow system, the low-resistance design saves approximately ¥1,200 per year in electricity costs (based on ¥0.8/kWh).
Filter Costs: Although individual filter prices are 30% higher than traditional filters, extended lifespan and reduced replacement frequency lower overall costs by 20%–30%.
V. Selection Recommendations
Cleanliness Requirements: For environments below ISO 5 (Class 100), H13-grade filters are recommended; ISO 4 (Class 10) requires U15–U17 grades.
Airflow Matching: The maximum airflow per V-shaped filter element should not exceed 1,500 m³/h to avoid filter media damage from high velocities.
Frame Material: Prefer PP frames in humid environments and PVDF-coated frames in chemically corrosive settings.
Conclusion: High-capacity V-shaped air filters achieve a balance between filtration efficiency, dust-holding capacity, and operating costs through structural optimization and material upgrades. They are ideal for industrial cleanrooms, medical facilities, and premium commercial buildings. The plastic frame design further expands application scenarios, particularly in environments requiring corrosion resistance and lightweight construction.