Jyntrel Bag Filter – G4 to F9 Efficiency for HVAC and Cleanroom Pre-Filtration

Jyntrel bag filters are extended-surface air filters rated G4 through F9, used to remove coarse and fine particulate from HVAC, cleanroom make-up air and industrial supply systems. They suit facility engineers, HVAC contractors and OEM buyers who need predictable performance at a rated face velocity of 2.5 m/s. The filter combines a high-capacity non-woven or fiberglass media with an aluminium or galvanised frame, and is available in standard and custom bag configurations.

Operating Conditions and Airflow Path

Bag filters are typically installed in the supply air path after the pre-filter stage and before the cooling coil or final filter bank. Air enters the open face, passes through the media pockets and exits through the frame opening. The pocket geometry increases media area without increasing face dimensions, which lowers resistance at a given airflow and extends service life.

Jyntrel bag filters are rated for a nominal face velocity of 2.5 m/s. At this velocity the filter operates within its design pressure drop range; higher velocities may increase resistance and reduce dust-holding capacity, so system designers should confirm the actual operating point. The media is non-woven synthetic fibre or flame-retardant fiberglass, both of which tolerate typical HVAC humidity and temperature variations without shedding or delamination.

Filtration efficiency is available from G4 up to F9, allowing a single product family to serve both pre-filtration and medium-efficiency duties. In multi-stage systems, a G4 or M5 bag filter protects downstream F7–F9 filters and coils, while an F7–F9 bag filter can serve as the final stage in cleanroom or process air systems.

Core Performance

The performance of a bag filter depends on three interacting factors: media efficiency, dust-holding capacity and structural strength. Jyntrel bag filters are designed to balance these factors for continuous duty in commercial and industrial air systems.

• High dust-holding capacity: The extended media area formed by the pockets captures more dust between change-outs, reducing filter replacement frequency and associated labour and disposal costs.
• Low initial resistance: At the rated 2.5 m/s face velocity, the filter presents a lower pressure drop than a flat panel filter of similar efficiency, which helps reduce fan energy consumption over the filter's service life.
• Pre-filter protection: Used upstream of higher-efficiency final filters, a G4 or M5 bag filter captures coarse dust and protects downstream components, extending the service interval of more expensive filters and coils.
• High-pressure construction: The aluminium or galvanised frame and reinforced pocket seams maintain shape at high face velocities and resist damage during handling and installation.

These characteristics make the bag filter a practical choice for systems that operate continuously and where filter changes are infrequent or costly to perform.

Selection and Customisation: the Data We Need

To recommend the correct bag filter, we need the following information:

• Airflow rate (m³/h or CFM) and the number of filters in the system.
• Face velocity or allowable face dimensions, if already fixed by the air handling unit.
• Required efficiency class (G4, M5, M6, F7, F8 or F9) and the target downstream cleanliness level.
• Operating environment: temperature, humidity, presence of oil mist, corrosive gases or combustible dust.
• Available space for filter depth and pocket length.
• Quantity and delivery schedule.

Standard sizes include 594 × 594 × 534 mm (24"×24"×21") with 6, 8 or 10 pockets; 594 × 492 × 534 mm (24"×20"×21") with 6 or 8 pockets; and 289 × 594 × 534 mm (12"×24"×21") with 3 or 4 pockets. A depth of 381 mm (15") is also available. For non-standard sizes, pocket counts or frame materials, we can customise based on drawings or samples. Our team can also assist with selecting the appropriate efficiency grade for your system's pressure drop budget and dust load.

Parameters

Typical Applications

Jyntrel bag filters are used across a wide range of air-handling systems:

• Commercial HVAC: Pre-filtration and medium-efficiency filtration in office buildings, shopping centres and airports.
• Cleanrooms and microelectronics: Make-up air units and recirculation systems where F7–F9 filtration is required.
• Pharmaceutical and food processing: Supply air filtration to protect products and processes from particulate contamination.
• Automotive and machinery: Paint booths, engine test cells and general ventilation.
• Energy and metal processing: Pre-filtration in power plants, smelters and other heavy-duty air systems.
• Data centres and energy storage: Air intake filtration for cooling systems, available in pre and medium efficiency grades.

Manufacturing and Testing at Jyntrel

Jyntrel manufactures bag filters at its 50,000 m² production facility in Zhongshan, Guangdong, China. Multiple automated production lines support a monthly capacity of millions of pieces, which helps maintain stable supply for large projects and seasonal demand. With over 20 years of export experience to Europe, the United States, Japan and South Korea, we understand the documentation and consistency requirements of international buyers.

Quality control follows a four-stage process: incoming inspection (IQC), in-process inspection (IPQC), final inspection (FQC) and outgoing inspection (OQC). Each batch is tested for efficiency, pressure drop, dust-holding capacity and structural strength. Our on-site laboratory is accredited by CNAS, and we can issue test reports for customer verification. The company holds ISO 9001, ISO 14001 and ISO 45001 certifications, and achieved IATF 16949 certification in 2024. Products comply with REACH and RoHS requirements, and compliance documentation is available on request.

We support OEM/ODM orders: custom sizes, pocket counts, media grades, frame materials, logos and packaging are all available. Over 1,000 filtration solutions have been developed to date.

Share Your Operating Conditions

To receive a tailored recommendation and quotation, please provide:

• Device or system model (air handling unit, cleanroom, etc.)
• Required filter size or a dimensional drawing
• Airflow rate and required efficiency class
• Operating conditions (temperature, humidity, contaminants)
• Estimated annual quantity

Send these details to our team via the contact page. We will respond with a suitable filter specification and quotation.