Thermal Carbonization & Off-Gassing Elimination: Standard paint booth pre-filters degrade, carbonize, or emit volatile chemical fumes under continuous curing temperatures, leaving defects on cured surfaces. This 21mm G3 fiberglass high-temp filter is strictly rated for up to 300°C continuous operation without melting, off-gassing, or releasing oil particles.
Low Initial Resistance for Fan Protection: Operates with an extremely low initial resistance of 40Pa at rated airflow. This drastically reduces the electrical load on high-temperature circulation fans while preventing thermal imbalance in paint curing chambers.
Ultra-Slim 21mm Profile: Specially engineered to fit tight card slots and low-clearance tracks within modern automotive and industrial paint booth bake ovens without requiring system retrofits.
Need This Specification in Bulk?
We offer flexible OEM/ODM manufacturing to match your exact dimension and efficiency requirements. Contact our team for a fast quote or to verify compatibility with a free test sample.
Filter Media: Pure, highly resilient G3 grade high-temp fiberglass media with high open-porosity. The dense, interwoven fiber matrix traps coarse dust and particles (≥5μm) while maintaining superior thermal stability up to 300°C.
Protective Mesh Support: Equipped with single/double-sided expanded aluminum mesh backing. This acts as a rigid structural lattice that prevents media sagging, fluttering, or blowouts under high-velocity hot air currents.
Frame Construction: High-rigidity extruded aluminum frame engineered with reinforced corner joints. It accommodates thermal expansion and contraction cycles without twisting, warping, or compromising seal integrity.
| Parameter | Specification |
| Filter Grade | G3 (EN779) / ISO Coarse |
| Media Material | High-Purity Fiberglass Media |
| Frame Material | Extruded Aluminum Alloy Frame |
| Standard Depth | 21 mm |
| Max Operating Temp | 300 °C (572 °F) Continuous |
| Initial Resistance | 40 Pa |
| Support Mesh | Single / Double-sided Aluminum Mesh |
| Customization | 100% Custom Sizes & Non-standard Dimensions Available |
Fully customizable specifications available. For detailed technical data, please 【visit the product page】 or 【reach out to our technical team】directly.
Working Principle: Functions as a robust primary barrier in the thermal loop. Air drawn into or recirculated within the curing chamber passes through the G3 fiberglass media. The multi-layer glass fiber matrix captures coarse airborne particulates before the hot air streams over freshly painted parts.
Application Environment: Specifically designed for industrial bake ovens, automotive paint booth curing zones, liquid coating line flash-off tunnels, and high-temperature thermal processing systems requiring continuous 300°C resistance and zero chemical volatility.
Inspection Protocol: Perform visual pressure-drop checks every 2 to 4 weeks using a differential pressure gauge during scheduled bake oven maintenance shutdowns.
Service Life: Typical service lifecycle spans 3 to 6 months under continuous high-temperature operating conditions, depending on ambient particulate loading.
Replacement Trigger: Replace the filter when the final pressure drop reaches 100–120 Pa or when noticeable dust loading causes airflow restriction across the curing zone.
Frequently Asked Questions
Q: Why choose an aluminum frame over galvanised steel for paint curing?
A: Extruded aluminum offers superior thermal expansion handling, light structural weight, and complete resistance to oxidation, preventing flaking rust particles from landing on wet paint coatings.
Q: Can this filter protect expensive downstream HEPA filters?
A: Absolutely. As a G3 pre-filter, it intercepts up to 80-90% of coarse particulates (≥5μm), preventing high-cost downstream high-temp HEPA filters from clogging prematurely.
Q: Are custom non-standard frame sizes available for older OEM ovens?
A: Yes, we specialize in 100% custom sizing. We manufacture precise length, width, and depth configurations to drop directly into non-standard OEM oven slots with zero bypass leakage.
Q: Does this 21mm fiberglass filter emit fumes or oil at 300°C?
A: No. The high-purity fiberglass media and metal assembly contain zero volatile organic binders or lubricants, guaranteeing zero off-gassing, fume release, or oiling in your paint booth curing chamber.
Q: Will the filter media blow out under high-velocity hot air loops?
A: No. The integrated aluminum mesh backing provides a strong back-pressure support lattice, keeping the media firmly locked in place under intense hot air flow.
