Heavy industrial plants and automotive spray booths operate under extreme volumetric airflows and coarse dust loads (5 microns and larger), which cause lightweight paper or plastic frame filters to rupture or collapse. The G3/G4 Galvanized Steel Pleated Filter provides an ultra-rigid, vibration-resistant filtration barrier designed to perform under high static pressure differentials without structural failure.
- Extreme Structural Rigidity: Heavy-gauge galvanized iron frame resists mechanical stress, high air velocity, and pressure surges in demanding industrial ductwork.
- Heavy Dust Interception: Captures heavy metallic particles, ambient grit, and synthetic fibers before air enters secondary filter banks or exhaust stacks.
- Corrosion Protection: Zinc-coated steel construction protects against oxidation in high-humidity ambient air intakes and rugged factory environments.
- Downtime & Cost Reduction: Eliminates filter blowouts, reducing emergency system shut-downs and lowering total replacement consumable budgets.
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Engineered for rugged factory ventilation and high-dust intake stacks, this steel-framed filter combines reinforced pleat geometry with high mechanical durability.
- Zinc-Coated Steel Frame Profile: Precision-bent galvanized steel frame provides maximum load-bearing strength and rust resistance across extended duty cycles.
- Wire-Backed Pleat Support: Synthetic filter media is backed with expanded metal grid wire to maintain uniform pleat spacing and prevent flex under heavy air drag.
- High-Capacity Synthetic Blend: Non-woven polyester filter media maximizes capture of 5-micron dust particles while keeping initial pressure drop minimal.
- Flame & Heat Resistant Options: Robust metallic frame construction operates reliably in elevated thermal environments where paper frames present fire risks.
| Specification | Value |
| Filter Class (EN779 / ISO 16890) | G3 / G4 (Coarse 50% – 65%) |
| Frame Depths Available | 21mm, 25mm, 46mm, 96mm (Custom profiles available) |
| Standard Sizes | 295×295, 495×295, 495×495, 595×295, 595×495, 595x595mm / Custom |
| Filter Media Type | Non-woven polyester blend with expanded wire grid support |
| Frame Material | High-grade Galvanized Steel Sheet / Zinc-Coated Iron |
| Initial Resistance | ~40 Pa (G3) / ~50 Pa (G4) at rated airflow |
| Recommended Final Resistance | 200 – 250 Pa |
| Operating Temperature Limit | Continuous max 90°C (194°F) |
| Relative Humidity Limit | 100% RH (Zinc corrosion protected) |
Fully customizable specifications available. For detailed technical data, please 【visit the product page】 or 【reach out to our technical team】directly.
This heavy-duty galvanized steel panel filter is designed for intense industrial air handling and harsh particulate environments:
Equipment Compatibility: Directly retrofits into industrial Air Handling Units (AHUs), spray booth fresh air plenums, industrial air washers, and large fan intake housings.
Automotive & Industrial Spray Booths: Ideal for pre-filtering paint spray booth supply air, trapping coarse dust to prevent paint surface defects.
Heavy Manufacturing Facilities: Essential for steel mills, foundries, machining plants, and chemical processing facilities requiring durable primary air cleaning.
Plant maintenance engineers should monitor differential pressure across intake banks to optimize replacement cycles:
Heavy Industrial / Spray Booth Duty: Inspect filter banks weekly in high-dust environments; replace filters every 30 to 45 days under heavy loading.
General Factory Supply Air: In standard manufacturing ventilation networks, service or replace filters every 60 to 90 days depending on ambient dust levels.
Maintenance Protocol: Track static pressure build-up using differential pressure gauges to ensure timely changeouts before intake fan energy draw spikes.
Frequently Asked Questions (FAQ) on Galvanized Steel Air Filters
Q1: Why choose a galvanized steel frame over cardboard or aluminum for industrial ventilation?
A1: Galvanized steel offers superior mechanical strength and impact resistance at a cost-effective price point. It withstands higher static pressure differentials, physical vibration, and rough installation handling compared to paper or light aluminum profiles.
Q2: How does the wire mesh backing enhance filter performance in heavy airflow systems?
A2: Expanded metal grid backing supports the pleated synthetic media, preventing pleat collapse, fluttering, or deformation under high fan speeds. This guarantees consistent air velocity and maximum dust holding capacity across the filter face.
Q3: Can these G3/G4 steel filters be manufactured in custom non-standard dimensions?
A3: Yes. As a direct factory manufacturer, we produce custom frame widths, lengths, and depth profiles (such as 21mm, 46mm, 96mm, or specialized heavy-duty channels) to fit legacy or custom industrial duct frames.
Q4: Is the galvanized steel frame suitable for high-temperature industrial air streams?
A4: Yes. Steel frames handle higher temperature limits than cardboard or standard plastic frames without off-gassing, warping, or structural degradation, making them suitable for warm factory intake and exhaust applications.
Q5: What packaging standard is used for bulk B2B sea freight shipments of steel frame filters?
A5: Filters are packed into heavy corrugated cartons with internal edge guards, stacked on reinforced export pallets, and wrapped in moisture-barrier film to prevent shipping damage and zinc surface oxidation during transit.
