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The Celrith Separator Pleated Rigid Box Filter is a medium-efficiency air filter built to capture particles, odours and gases that would otherwise load up your ventilation system. It removes airborne contaminants across G4 to F9 efficiency grades, protecting downstream equipment and indoor environments. It is designed for facility managers, HVAC engineers and OEMs in commercial, industrial and cleanroom applications. Celrith manufactures it in Zhongshan, Guangdong, China, with custom sizes and configurations available.
Air handling systems constantly draw in particulate matter — dust, pollen, soot, fibres and microorganisms — along with odorous and gaseous compounds from traffic, industrial processes and building materials. In pharmaceutical, electronics, food processing and automotive paint environments, these contaminants can ruin products, clog heat exchangers and raise maintenance costs. Without effective prefiltration, larger particles reach high-efficiency final filters and shorten their service life, increasing pressure drop and energy use. The Celrith Separator Pleated Rigid Box Filter addresses this by providing a high-capacity medium-efficiency barrier that captures a broad spectrum of particles before they reach critical equipment.
When particulate load builds up, the consequences ripple through the entire system. Fans must work harder to overcome rising resistance, which increases energy consumption and may reduce airflow to critical zones. Heat exchangers and coils become fouled, reducing heat transfer efficiency and potentially causing overheating or condensation issues. Downstream HEPA filters load prematurely, leading to more frequent replacements and higher operating costs. In cleanrooms, particle penetration can jeopardise product quality and compliance. The Celrith filter reduces this load by trapping contaminants early, maintaining stable airflow and protecting sensitive components from unnecessary wear.
Celrith’s separator pleated rigid box construction combines a sturdy frame with corrugated separators that keep the pleats evenly spaced, preventing deformation and rupture under high airflow. The deep pleat design provides a large filtration area, resulting in high dust-holding capacity and extended service intervals. Media options include high-quality non-woven fibre and high-precision glass fibre, allowing you to match filtration performance to your specific contaminant profile. With a rated operating air velocity of 2.5 m/s, the filter is suitable for high-volume ventilation systems. The rigid box design maintains structural integrity even under turbulent airflow, ensuring consistent efficiency throughout its service life.
| Item | Detail |
|---|---|
| Product name | Separator Pleated Rigid Box Filter |
| Efficiency grades | G4 / M5 / M6 / F7 / F8 / F9 |
| Media | High-quality non-woven fibre / high-precision glass fibre |
| Frame and support | Aluminium or galvanised steel frame with corrugated separators |
| Rated operating air velocity | 2.5 m/s |
| Typical applications | Pre-filtration for Class 100 cleanrooms in pharmaceutical and electronics plants; intake sections of commercial AHU systems; dust removal in paint shops; high-velocity industrial exhaust outlets |
| Standard sizes (W × H × D) | 24×24×21 in (594 × 594 × 534 mm); 24×20×21 in (594 × 492 × 534 mm); 24×24×15 in (594 × 594 × 381 mm); 12×24×21 in (289 × 594 × 534 mm) |
| Customisation (OEM/ODM) | Custom sizes and non-standard frames supported. Our 50,000 m² plant includes a CNAS-accredited laboratory; certified to ISO 9001, ISO 14001, ISO 45001 and IATF 16949. |
The Celrith Separator Pleated Rigid Box Filter serves a wide range of industries where reliable medium-efficiency filtration is essential. In commercial HVAC and ventilation systems, it protects air handling units and improves indoor air quality. Semiconductor and microelectronics facilities use it as pre-filtration for cleanrooms, safeguarding sensitive processes. Healthcare and cleanroom environments rely on it to maintain air purity. Pharmaceutical and food processing plants use it to control contamination and meet hygiene standards. Automotive and machinery manufacturing benefit from its dust removal capabilities in paint shops and workshops. Data centres and AI computing facilities deploy it to protect servers from particulate damage. Energy and metal smelting operations use it in high-temperature or high-load ventilation systems. With multiple efficiency grades and custom sizes, it adapts to diverse operational requirements.
Celrith’s commitment to quality and compliance is backed by concrete credentials. Our products meet REACH and RoHS environmental regulations, and we hold ISO 9001, ISO 14001 and ISO 45001 certifications. Our in-house laboratory is CNAS-accredited and can issue test reports for filtration efficiency, dust-holding capacity and pressure drop. The 50,000 m² manufacturing facility includes 20,000 m² of cleanrooms across six workshops, ensuring contamination-free production. In 2024, we obtained IATF 16949 certification, further strengthening our quality management system. With over 20 years of experience and exports to Europe, the US, Japan and Korea, we provide reliable supply and support for OEM/ODM projects.
To recommend the right Celrith filter for your application, please provide your device or vehicle model, required size or drawing, airflow or water flow rate, operating conditions and estimated quantity. Our team will respond promptly with a tailored solution. Contact us to discuss your filtration needs.
It removes airborne particles such as dust, pollen, soot and fibres with efficiency grades from G4 to F9. It also captures microorganisms and some odorous/gaseous compounds depending on the media selected. It is effective on particles 0.5 μm and larger when using glass fibre media.
By trapping contaminants early, it reduces loading on heat exchangers, coils and high-efficiency final filters. This maintains stable airflow, lowers pressure drop and extends the service life of critical components. The rigid box design ensures consistent performance even under high airflow.
Yes, Celrith supports OEM/ODM customisation, including non-standard dimensions, frame materials and media grades. Provide your drawing or specifications, and we will develop a sample within 7–15 days. Our CNAS lab can test efficiency, pressure drop and dust-holding capacity to verify performance.
For standard sizes, the MOQ is typically 50–100 pieces. Custom sizes are negotiable based on specifications and materials. We accommodate both small trial orders and large-volume contracts.
Standard products ship within 15–20 days. Custom filters require 25–35 days depending on complexity. For large orders, we provide a precise delivery schedule based on production capacity.
Under normal commercial HVAC conditions, replacement is typically every 12–18 months. Actual interval depends on air quality, operating hours and final pressure drop setpoint. Our CNAS lab can provide dust-holding data to help you optimise the schedule.
Yes, standard samples are available quickly, and custom samples take 7–15 days. Each sample includes a CNAS test report with efficiency, initial pressure drop and dust-holding capacity. We also offer installation guidance for OEM partners.
The filter is manufactured under ISO 9001, ISO 14001 and ISO 45001 systems, and our facility holds IATF 16949 (2024). Products comply with REACH and RoHS. Test reports from our CNAS-accredited lab support performance claims.