Commercial Permanent Metal Air Filter in 304 Stainless Steel (AISI 304 (1.4301)) is used for pre-filtering air in commercial and industrial air handlers with rigid, washable metal filters that stay in service for years instead of being thrown away. The alloy gives good general corrosion resistance in atmosphere and fresh water and is essentially non-magnetic (annealed), with a practical service limit of approx. +450 °C continuous.
Alloy Properties
| Grade designation | AISI 304 (1.4301) |
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| Magnetic response | Essentially non-magnetic (annealed) |
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| Service temperature | approx. +450 °C continuous |
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| Corrosion characteristic | Good general corrosion resistance in atmosphere and fresh water |
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Specifications of Commercial Permanent Metal Air Filter Available in 304 Stainless Steel
| Size | Width X (mm) | Height Y (mm) | Thickness (mm) | Media | Frame |
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| 20 u00d7 20 u00d7 2 in | 508 | 508 | 50 | Aluminum layered expanded | Galvanized steel |
| 24 u00d7 24 u00d7 2 in | 610 | 610 | 50 | Aluminum layered expanded | Galvanized steel |
| 20 u00d7 25 u00d7 2 in | 508 | 635 | 50 | SS430 layered mesh | SS430 |
| 24 u00d7 24 u00d7 4 in | 610 | 610 | 100 | Galvanized expanded + knitted | Galvanized steel |
Where 304 Stainless Steel Commercial Permanent Metal Air Filter Is Used
- Commercial HVAC: air-handler pre-filters in offices, schools and hospitals.
- Industrial plants: make-up air units in dusty or oily environments.
- Commercial kitchens: grease pre-filters on make-up air.
- Paint & finishing booths: intake pre-filters.
Ordering Commercial Permanent Metal Air Filter in 304 Stainless Steel
- Size: Nominal 20 × 20, 24 × 24 or 20 × 25 in at 2 in or 4 in depth.
- Media: Layered aluminum for weight; SS430 or galvanized for heat and abrasion.
- Frame: Galvanized steel or stainless with handles for frequent removal.
Mistakes to Avoid with Commercial Permanent Metal Air Filter
- Using a metal pre-filter as the final filter.
- Re-installing filters wet, which carries water onto the coil.
