Addressing the high consumable replacement costs and filter collapse issues in industrial ventilation and HVAC systems, Cleantop has specially developed the Metal Double-Frame Pre-Filter. With a rigid outer frame that does not deform, the internal filter can be easily pulled out and replaced. Made with polyester fiber material that tolerates 100% relative humidity, it creates an invulnerable shield for your Air Handling Unit (AHU), truly achieving cost reduction and efficiency enhancement.
Get Industrial Pre-Filter Solutions and QuotesMove away from the traditional model of “throwing it all away when it’s dirty”. The innovative Double-Frame (Dual Layer Frame) structure allows for the sturdy metal main frame to be retained during routine maintenance, while only the internal dirty filter material or subframe is replaced. This greatly reduces long-term material procurement and solid waste disposal costs for businesses.
Utilizing moisture-resistant polyester fiber (PET) filter material, paired with aluminum profiles or galvanized frameworks. This perfectly overcomes the weakness of paper frame filters becoming damp and collapsing easily in the humid Southern weather or spray workshops, ensuring stable operation even under 100% humidity.
Boasting exceptional mechanical strength, it withstands the high-pressure shocks of large air volume systems. It effectively intercepts larger particles and fibers of dust greater than 5μm in the air. Serving as the frontline for the Air Handling Unit (AHU), it effectively prevents fouling of internal heat exchangers and significantly extends the lifespan of high-efficiency filters.
| Product Name | Metal Double-Frame Pre-Filter (Double-Frame Metal Primary Filter) |
|---|---|
| Core Filter Material (Media) | High Toughness, High Humidity Resistant Polyester Fiber (Polyester Fiber) |
| Frame Material (Frame) | Aluminum Profile (Aluminum) / Galvanized (Galvanized) / Plastic Frame (Plastic) Optional |
| Extreme Operating Conditions Tolerance | Maximum Operating Temperature: 50℃; Maximum Relative Humidity: 100% |
| Common Optional Thickness | 46 mm / 69 mm / 96 mm (approximately 2 inches, 3 inches, 4 inches) |
| Core Application Scenarios | Pre-filter for Central Air Conditioning in Factory Workshops, High Humidity Exhaust Environments, New Air Systems Air Inlets, Air Handling Units (AHU) |
| Common Standard Size Reference (Width × Height × Thickness, mm) |
• 594 × 289 × 46 / 69 / 96 • 594 × 492 × 46 / 69 / 96 • 594 × 594 × 46 / 69 / 96 |
| Custom Services (OEM/ODM) | Cleantop has a 50,000㎡ factory and a CNAS national laboratory, with products certified by ISO/IATF16949. 100% support for various non-standard sizes and frame thicknesses, tailored to your needs. |
Whether you are looking for a higher strength filter as a long-term alternative to easily damaged paper frame filters, or matching a metal double-frame filter for your new HVAC equipment, Cleantop can offer you highly competitive source prices and top-notch quality assurance based on over 20 years of air filtration R&D and manufacturing experience.
Contact the Engineering Team / Request Custom SampleOur metal frame non-woven fabric pre-filter meets EN779 standards, with a filtration grade typically of G3/G4 (corresponding to ISO 16890 standards' Coarse grade), achieving good interception efficiency for particles ≥5μm. This product is mainly used in commercial air conditioning systems (HVAC), fresh air systems, ventilation ducts, air compressor inlets, and as a pre-filter for medium to high-efficiency filters, effectively intercepting large particles of dust, hair, fibers, etc., prolonging the lifespan of downstream high-efficiency filters.
This product utilizes galvanized steel or aluminum alloy frames (available as needed), providing good structural strength and corrosion resistance; the filter material is made of high-quality synthetic fiber non-woven fabric, boasting high dust capacity, low resistance, and minimal fiber shedding. Under normal conditions, the service life is approximately 2-3 months, depending on the cleanliness of the onsite air, air volume, and runtime. The filter can support multiple cleanings and reuses (depending on material version), further reducing the customer’s operating costs.
Absolutely. Cleantop has over 20 years of experience in customizing filtration products and can provide comprehensive OEM/ODM services based on customer drawings or samples, including dimensions, thickness, filtration grades, frame materials (galvanized frame/aluminum frame/paper frame), filter material basis weight, logo printing, and custom packaging. We have a professional R&D team and a sample department, capable of providing customized samples for confirmation within 7-10 days.
Cleantop has obtained ISO 9001, ISO 14001, and ISO 45001 management system certifications, along with multiple international certifications such as Europe BSC1, US EPA, NSF, SOP, etc. In 2024, our company renewed to obtain IATF16949 automotive industry certification and GMP certification for medical products. The products have successfully been exported to markets in Europe, the United States, Japan, and South Korea, fully meeting the compliance requirements for mainstream markets.
Cleantop has a 50,000㎡ factory and 20,000㎡ of clean workshops (6 in total), ensuring a controlled production environment. Our company is equipped with a national-level CNAS-accredited testing center that can conduct comprehensive testing on the filter's filtration efficiency, resistance, dust holding capacity, structural strength, and other key parameters. Each batch of products strictly follows input inspection (IQC), process inspection (IPQC), and outgoing inspection (OQC), and retains complete testing reports to ensure 100% consistency between bulk qualities and samples.
Standard specification product MOQ is quite flexible, typically starting at 500 pieces; custom specifications MOQ generally starts at 1000 pieces, but specifics can be negotiated depending on the project situation. The lead time for regular orders is 15-25 days, while custom orders generally take 25-35 days. Our company has its own production base and multiple automated production lines in Zhongshan, which can flexibly schedule production based on customer order priorities and supports various shipping methods including sea, air, and express delivery.
Yes. For B2B customers with clear purchasing intentions, we can provide free standard specification samples for testing and evaluation; customers only need to cover international express shipping fees. If custom specification samples are needed, a small sampling fee will be charged based on development complexity (which can be refunded after mass production). At the same time, we can provide third-party test reports issued by the CNAS laboratory to assist customers in validating product performance.
Standard packaging adopts independent PE bags + five-layer reinforced corrugated cartons, with the outer box printable with customer LOGO and SKU information. The filters are stacked by specification and use moisture-proof, pressure-proof designs to ensure integrity during long-distance sea transport. Our company can optimize the packing plan according to container types (20 feet/40 feet/40HQ) to maximize loading rates. For customers with high cleanliness requirements, we can provide packaging in clean workshops and vacuum bag packaging solutions.
