Air filters achieve filtration through physical interception: when air flows through the microporous structure of the filter element, particulate impurities are trapped on the surface or inside of the filter material, while clean air passes through smoothly and enters the compressor.
Comparison Of Filter Materials
| Material | Key Features | Advantage | Shortcoming | Applicable Scenarios |
| Microporous filter paper (wood pulp paper) | It offers excellent value for money and is treated with resin to enhance its water resistance. | Low cost and consistent filtration efficiency. | It has moderate water resistance and is susceptible to high-pressure backflush. | Economical general-purpose filter cartridges are the most commonly used. |
| Polyester fiber nonwoven fabric | High strength, wear-resistant, and chemically resistant. Surface treatments are available (coating, oil-proofing, waterproofing, anti-static). | It is durable and adaptable to harsh environments. | The cost is slightly higher. | Industrial-grade filter element, suitable for high dust, humid, and corrosive environments. |
| Fiberglass | It has extremely high filtration accuracy and efficiency, and strong ability to capture tiny particles (up to 99.9% for particles larger than 0.5μm). | High precision and stable resistance. | It is relatively expensive and quite brittle. | High-efficiency air filters are used in situations where air quality requirements are extremely high. |
| Cotton pulp paper | The price is low. | Cheap. | Poor performance; easily damaged by moisture, deformed, or broken. | Not recommended for use; commonly found in inferior filter cartridges. |
Common Faults and Diagnostics
| Appearance features | Possible reasons | Recommended measures |
| Dust accumulates evenly on the windward side, and its color is grayish-white. | Under normal use, the filter is effective. | A standard replacement is sufficient. |
| The windward side had severe dust accumulation in some areas, while other areas were clean. | The air inlet has a baffle/uneven air intake; or the filter element is installed at an angle. | Inspect the intake duct layout and filter mounting bracket. |
| The filter paper surface is oily/wet | There may be oil leakage or oil mist near the air intake (such as in the exhaust pipe or breather). | Inspect and eliminate sources of pollution in the surrounding area. |
| Filter paper turns black and has sticky carbon deposits. | Inhalation of oily fumes; or backflow of oil mist inside the air compressor (such as due to improper closing of the intake valve or rupture of the oil return pipe). | Check the intake valve and oil return system. |
| The filter paper has a hole or tear somewhere. | Scratches during installation; damage to the filter element caused by high-pressure backflush; or poor quality filter media. | Replace the filter cartridge and check the installation method. |
| There are obvious dust marks at the sealing ring. | The seal is not tight (the sealing ring is old or not installed properly). | Check the sealing ring each time it is replaced, and you can apply a little grease to help seal it. |
| Filter element deformation and collapse | Excessive resistance may result from prolonged use, or the filter media may be of poor quality. | Shorten replacement cycles and upgrade to more pressure-resistant filter elements. |
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Packaging and Transportation
FAQ
Q1. What is your terms of packing?
A: Typically, we use neutral white boxes and brown cartons for packing. If you hold a legally registered patent, we can apply your branded boxes upon receipt of your authorization letters.
Q2. What is your terms of MOQ?
A: A minimum order quantity applies to each item, and the specific quantity will be indicated on our quotation sheet. For assorted items, the MOQ is negotiable.
Q5. Can you produce according to the samples?
A: Yes, manufacturing can be done according to your samples or technical drawings. We are also able to build the molds and fixtures.
Q6. What is your sample policy?
A: Samples are available from our ready stock. However, customers are required to cover the sample cost and courier charges.
Q7. Do you test all your goods before delivery?
A: Yes, we conduct a 100% test on all products prior to delivery.
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