Flange Bag Pre Filter

Product Description

The Flange Bag Pre Filter is a high-capacity, medium-efficiency air filter designed for use as the first or second stage of air filtration in HVAC systems and industrial ventilation units. Featuring a rigid flange frame and multi-pocket synthetic or fiberglass bags, this filter offers exceptional dust-holding capacity, long service life, and reliable particle capture performance.

Its modular, deep-pocket design provides a large filtration surface area, while the flange frame ensures secure installation in standard filter banks or housings. Ideal for protecting downstream fine or HEPA filters by removing larger particulate contaminants such as dust, pollen, and lint.

Key Features:

• High Dust-Holding Capacity: Multi-pocket design traps large volumes of coarse particles.

• Flange Frame Design: Ensures a tight, leak-proof fit in HVAC housings and filter banks.

• Medium Filtration Efficiency: Suitable for F5“F7 ratings (MERV 8“13), depending on model.

• Robust Construction: Durable synthetic media and corrosion-resistant metal or plastic frame.

• Energy Efficient: Low initial pressure drop helps maintain system airflow and reduce energy costs.

Specifications (Typical):

• Filter Class: F5, F6, F7 (EN 779) / MERV 8“13 (ASHRAE 52.2)

• Media: Synthetic fiber / Glass fiber

• Pockets: 3“10 pockets (varies by size)

• Frame Type: Galvanized steel / ABS plastic flange

• Standard Sizes: 592x592 mm, 490x592 mm, 287x592 mm (custom sizes available)

• Depth: 300“600 mm

• Rated Airflow: Up to 3600 CFM

• Temperature Resistance: Up to 70C continuous

Applications:

• Commercial and industrial HVAC systems

• Air handling units in office buildings, malls, and hospitals

• Pharmaceutical, food processing, and cleanroom pre-filtration

• Paint spray booths and ventilation systems

Frequently Asked Questions (FAQ)

Q1: What is a flange bag pre filter used for?

A: It™s used as a first-stage or second-stage air filter to remove larger particles like dust, lint, and pollen. It protects more sensitive downstream filters (e.g., fine or HEPA filters) and extends their service life.

Q2: What does the flange do on this filter?

A: The flange is a rigid lip or edge around the frame that allows secure mounting in HVAC filter banks, preventing air leakage or filter bypass.

Q3: How many pockets should I choose?

A: The number of pockets (typically 3 to 10) depends on your airflow rate, unit size, and dust load. More pockets generally offer better dust-holding capacity and lower pressure drop.

Q4: Are flange bag pre filters washable or reusable?

A: No, these filters are not washable. Washing may damage the media structure and reduce filtration efficiency. They should be replaced when dirty or clogged.

Q5: What is the expected lifespan of this filter?

A: Lifespan varies with environmental conditions, but typically ranges from 3 to 6 months in normal commercial or industrial use.

Q6: Can I use this filter in a high-humidity or high-temperature environment?

A: Yes, synthetic bag filters with metal or plastic flanges are designed to perform in humid and moderately high-temperature environments (up to 70C). For extreme conditions, specialty versions are available.

Q7: Do you offer custom sizes or materials?

A: Yes, we offer a wide range of custom sizes, pocket depths, and materials to meet specific application requirements. Contact us with your dimensions and airflow needs.