Oval Filter Bags and Cages

Description

Why Adopt a Flat-oval Design?

This design is no mere coincidence; it is engineered to address a number of complex technical challenges.

• Space Optimization

Compared to circular filter bags, oval filter bags can be arranged more densely, thereby increasing the total filtration area per unit volume.

• Improved Airflow Distribution

Their relatively flat sides facilitate a more uniform distribution of airflow across the surface of the filter bags, thereby minimizing airflow dead zones.

• Structural Stability in Compact Layouts

In installations featuring a dense arrangement of filter bags, oval cages effectively prevent the bags from deforming.

• Compatibility with Rectangular Housings

Many modern dust collectors utilize a rectangular housing structure; the geometric shape of oval filter elements aligns more seamlessly with this type of enclosure.

On Which Types of Filters Are They Used?

• Pulse Jet Bag Filters (Pulse Jet Baghouses)

Especially in compact or high-capacity systems where more filter media must be installed in limited space.

• Top-Loading Dust Collectors

Where bag replacement and maintenance are performed from the clean air side.

Standard Dimensions (Flat Width × Thickness)

Model	Flat Width (mm)	Thickness (mm)	Equivalent Round Diameter (Approx.)
OF-120×60	120	60	Ø130–140 mm
OF-130×65	130	65	Ø140–150 mm
OF-140×70	140	70	Ø150–160 mm
OF-150×75	150	75	Ø160–170 mm
OF-160×80	160	80	Ø170–180 mm
OF-180×90	180	90	Ø190–200 mm

Materials & Properties of Dust Collector Filter Bags

Material	Working Temperature	Instant Temperature	Abrasion Resistance	Hydrolysis Resistance	Acid Resistance	Alkali Resistance	Oxidation Resistance
Polyprolene Needle Felt	90℃	110℃	Good	Excellent	Excellent	Excellent	Middle
Acrylic Needle Felt	120℃	130℃	Middle	Good	Good	Middle	Good
Polyester Needle Felt	130℃	150℃	Excellent	Poor	Middle	Fair	Good
PPS Needle Felt	180℃	200℃	Good	Excellent	Excellent	Excellent	Fair
Aramid Needle Felt	204℃	220℃	Good	Middle	Middle	Good	Middle
P84 Needle Felt	240℃	260℃	Good	Middle	Middle	Middle	Good
PTFE Needle felt	250℃	280℃	Good	Excellent	Excellent	Excellent	Excellent
Fiberglass Needle Felt	250℃	280℃	Fair	Good	Middle	Fair	Good
Woven Fiberglass Filter Cloth	260℃	280℃	Good	Good	Good	Good	Good

Common Filter Bag Cage Materials

• Stainless Steel

Since stainless steel has excellent corrosion resistance and high temperature resistance, stainless steel bag cages are often used in filtration systems that need to handle corrosive substances or high temperature environments. Its material is usually 304 or 316 stainless steel.

• Titanium Steel

Titanium bag cage is an advanced filter system component, mainly used in extreme environments, such as high corrosion, high temperature or applications requiring lightweight materials. Titanium alloy has become an ideal choice for high-demand fields such as chemical, pharmaceutical, and marine engineering due to its excellent corrosion resistance, strength and high temperature resistance.

• Galvanized Steel

Through hot-dip galvanizing or electro-galvanizing process, a layer of zinc coating is formed on its surface, which effectively improves the corrosion resistance of the bag cage and prevents rust. Galvanized steel bag cage is a cost-effective industrial filter bag support solution, suitable for a variety of industrial dust removal scenarios

• Silicone Coated Steel

The silicone coated dust bag cage is based on the traditional bag cage, and is coated with a layer of silicone coating to improve its corrosion resistance, high temperature resistance and wear resistance. It is a special bag cage for desulfurization and dust removal in power plants, which can replace stainless steel bag cages and greatly reduce the maintenance cost of equipment.

Choose Filmedia®

Filmedia® provides customized filter bags and cages for your dust collection projects, delivering reliable solutions tailored to a wide range of industrial applications. With extensive experience in filtration materials and system design, Filmedia® supports industries such as cement, steel, power generation, chemicals, and asphalt mixing.