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Reverse Fiberglass Filter Bag
Reverse Fiberglass Filter Bag

Reverse Fiberglass Filter Bag

Basic commercial terms of Reverse filter bag:

Place of OriginShanghai, China
CertificationISO, FDA
Product ItemReverse filter bag
Minimum Order Quantity10pcs  (1pcs free sample)
PriceContact us to get an exact quotation
Packaging DetailsThe inner packing is in plastic bags The outer packing is in carton Large volume can also support custom packaging
Delivery Time7-30days after deposit. According to the specific order quantity.
1-7days for sample
Port of shipmentShanghai, Ningbo, Qingdao, Lianyungang, Guangzhou, Shenzhen or Others
Payment Terms30% Deposit, balance TT on copy B/L. Other payment methods can be negotiated according to the order requirements
Supply Ability:100000pcs/month
OEM/ODMYes, we can support customized, like size, shape, material
After-sales Services1 year warranty after we both sign the plant investigation usually for this one

What is a Reverse filter bag?

The anti-blow filter bag is just a type of filter bag used in anti-blow dust collectors, which can be made of polyester and fiberglass etc. The most commonly used material on the market is fiberglass. In the reverse airbag compartment, dirty air flows from the inside to the outside, causing dust to accumulate inside the filter bag. The filter bag is tubular, with an opening at the bottom and connected to the tube plate. They are supported from the top using a J-bolt spring or J-bolt suspension system. Airflow is reversed to initiate bag cleaning. The anti-collapse ring is sewn on the outer side of the bag at intervals of 3 to 4 feet to prevent complete collapsing of the bag during reverse air cleaning. In offline mode, filter bags are cleaned one compartment at a time.

Glass fiber woven felt bag is a kind of filter material with reasonable structure and good performance. This filter bag has the advantages of glass fiber fabric such as high temperature resistance, corrosion resistance, dimensional stability, minimal elongation and shrinkage, and high strength as well as having a single fiber, three-dimensional micro porous structure with high porosity.

Compared to other high-temperature resistant chemical fiber felt filter bags, it has the special advantages of low price and higher temperature resistance. Its running resistance is higher than that of ordinary chemical fiber high-temperature filter materials.

Glass fiber filter cloth is made of the fiberglass yarn with special treatment like graphite, silicon, PTFE dipping, anti-acid other chemical repellent treatment. It is an ideal high temperature resistance filter cloth. The fiberglass filter bags are widely used in industrial dust clean area, bag house, air pollution and valuable dust recycling systems.

The performance and service life of woven glass fiber filter media varies with the type of yarn, fiber diameter, twist, density and fabric structure. The influence of fabric structure on filter material performance are as following:

① Wear resistance: Plain>twill>forged grain.

② Softness: Forged grain>twill>plain grain.

③ Void ratio: Forged grain>twill>plain grain

Performance of fiberglass filter bag

1. Good heat resistance, suitable for long-time use under a temperature below 280 deg.

2. Good dust peeling performance, low power consumption for ash removal.

3. The size of the fiberglass filter bags is more stable, no fiber shrinkage under the high temperature.

4. Good chemical resistance: In environments containing moisture {hydrolysis} acid strong acid, and strong alkaline, it is more stable than other filter medium.

5. The fiberglass filter fabric does absorb moisture and humidity.

6. Filtering efficiency of the fiberglass filter bag can reach over 99.5% and it can catch the dust below the PM2.5 .It can achieve to get the 20mg air release.

7. High strength of the fiberglass filter cloth. It can reach to more than 3000N/5*20cm.

What are the special production procedures for Reverse filter bags?

The woven fiberglass filter bag is made by sewing fiberglass woven fabric. The most traditional fiberglass woven filter bags on the market only need to be sewn before use. However, in complex working conditions with special and high filtration requirements. Special production procedures can be used to improve the performance and efficiency of filter bags.

Filter bags can be treated with singeing, calendaring, water and oil repellent coating, PTFE impregnation and lamination as per customer’s requirements and specifications.

Why Should You Choose SFFILTECH Reverse Filter Bag?

1. Reliable product quality

SFFILTECH has 3 production software and 22 advanced filter bag patents to ensure the efficiency and quality of filter bags

SFFILTECH strictly follows ISO standard production procedure and the regulations of automated production.

The production factory has a set of quality inspection procedures and a team of assisting personnel for pre-production, during production, and post production.

If required, a third-party laboratory quality inspection reports for each batch of products can be provided.

2. Convenient and stable shipment:

SFFILTECH has over 20 brand new filter bag production machines and equipment making the company capable of consistent production.

Stable and continuous supply and production. Large scale of storage of raw materials and accessories.

Independent warehouse provides a large amount of storage space for shipment stock.

Our company uses highly efficient transportation and courier services.

SFFILTECH has over 10 years of experience as a manufacturer.

3. Safe and reliable payment transactions:

Since its establishment, SFFILTECH has been cooperating with the most reliable banks in China, ensuring the safe funds transfer.

SFFILTECH supports multiple payment methods and can collaborate with third-party banks and enterprises to ensure the security of customer payment.

“Integrity has always been one of the most important concern of SFFILTECH”

4. Excellent pre-sales and after-sales service:

SFFILTECH has multiple experienced sales personnel providing 24-hour service.

SFFILTECH can provide instant online after-sales support as well as overseas after-sales services.

SFFILTECH has multiple agents worldwide and branches in some regions that can provide services in person.

What are the advantages of Reverse filter bags?

Glass fiber reverse filter bags are used in extremely high temperature environments, except for basalt filter bags and FMS filter bags. It is used in the anti-blowing dust particles collection system.

1. Excellent heat resistance : The maximum operating temperature of glass fiber filter material after surface chemical treatment can reach 280 ℃, which is highly suitable for dust filtration systems . Currently and in future, glass fiber remains an important high-temperature filtering material.

2. High strength and low expansion rate: its tensile strength is higher than that of various natural and synthetic fibers .With an elongation rate of only 2% -3%. This characteristic is sufficient to ensure the filter bag with a large aspect ratio designed and manufactured to have high tensile strength and dimensional stability.

3. Excellent corrosion resistance: Presently, the commonly used glass fibers produced in China are divided into two types: alkali free and medium alkali free. Alkali free E glass fibers have high resistance to water and moist air and weak alkaline solutions at room temperature. But they are not resistant to high solubility acid and alkali corrosion. Medium alkali fibers have good water and acid resistance therefore, different components of glass fibers must be selected according to the introduced properties in order to achieve better results.

4. The surface of the glass filter material is smooth, with low filtration resistance .Which is conducive to dust removal. It does not burn or deform.

5. The fiberglass filter material is brittle. It is not resistant to bending and is not wear-resistant .It has some deformation after being pulled. Glass fiber fabrics without surface chemical modification treatment cannot meet the requirements of high-temperature filter materials. So their performance largely depends on the surface treatment process, formula, and fabric structure.

The reverse filter bag offers a very convenient and easy cleaning process .Making it a high performance and efficient product with long service life, Hereby it is very cost-effective and reduces the environmental pollution.

How to check what kinds of filter bag is suitable for the bag house?

When old filter bag requires replacement:

Once you remove the filter bag from the filter housing, you can just take some measurements and pictures to send them to us. We would be able know your filter bag specifications using this method.

If you are able send us the samples, we can analyse the sample bag material and treatment.

We can make a sample for you to test its fitment with your bag house within a few days.

When you want to install a new filtration system and need some advice:

1. We will send you a configuration to fill it according to your specifications and conditions like temperature, chemical content and others. After you send it back to us .We will inform you about what kind filter bag is suitable for you.

2. Our engineers can arrange online meeting with your engineer or provide you with the configuration based on your demand.


What are the chemical properties of Reverse filter bags?

ItemFilter TypeContinuous
Resistance to
Resistance to
Resistance to AlkalisResistance to OxidationPH Value
FiberglassGlass fiber280℃350℃ExcellentExcellentmoderateExcellent1-14
AcrylicPolyacrylnitrile homopolymer125°C140°Cgoodgoodmoderategood3-11

What are the physical and mechanical properties of Reverse filter bags?

No.MaterialWeaving typeWeight (9/m2)Air permeability (cm3 /cm2/s @ 127Mpa)Tensile Strength
(N/25cm )
1E-glass (T)Double twill760±202-5>2400>2000PTFE MembraneCement industry:
1. CaO dust produced in the decomposition process of CaCO dust which is not decomposed safely from the cement raw meal in the decomposing furnace;
2. Gases such as SO, NO, CO, CO produced in the calcination process of pulverized coal for calcination;
3. The exhaust gas discharged from the cyclone reaches a high temperature of at least 320°C and is dry;
4. The dust reaches a density of 40-130mg/Nm3, with 90% in a dust particle diameter less than 10pm; with a NO content of less than 250PPm; a NO content of 100- 1700mg/Nm3;
5.CO and CO2 contents sometimes fluctuate with the calcination sufficiency of pulverized coal;
2E-glass (T)Double twill760±202-5>2400>2000PTFE Membrane
3E-glass (T)Double twill760 ±20<30>2400>2000PTFE Dipping
4E-glass (T)1/3 twill340±152-5>1300>800PTFE Membrane +Acid resistanceIron alloy industry
Features of working conditions of iron alloy
1. High and significantly fluctuated temperature of fume, unstable working conditions
2. Light and fine dust, with 90% of ferrosilicon dust in a particle diameter ≤1μm
3. High adhesion of dust tends to cause dust cake
4. The filtration medium is required to be anti-corrosive, heat-resistant with good dust-cleaning performance.
5E-glass (T)1/3 twill450±15<33>2000>1000PTFE dipping, silicion and graphite
6E-glassDouble weft550±15<45>2000>2000graphite
7E-glassDouble weft550±152-5>2000>2000PTFE dipping + graphite
8C-glassDouble weft550±15<45>2000>2000graphite
9E- glass+ptfeDouble twill820 ±22-5>2000>2000PTFE membraneWaste incineration industry
Features of working conditions of waste incineration
1. Waste contains complex and seriously harmful components, with high requirements for treatment;
2. Unstable temperature and amount of fume, at a temperature ranging between 140°C-260°C
3. High temperature of fume up to 60%, tending to cause bag sticking
4. The fume contains dust of high density up to 50g/m3, being light and fine
5. The fume has a relatively high content of corrosive substance, causing rise in acid dew point
10RefrasilDouble twill760±20<30>2400>2400PTFE dipping
11RefrasilDouble twill760±202-5>2400>2400PTFE membrane
12E-glass*ptftDouble twill820+202-5>2000>2000PTFE membranePower industry
Features of working conditions of coal-fired power plant
1. Relatively high density of dust at the inlet of deduster
2. The fume has a high content of components such as SO2, NO, O2, O3, which have a strongly destructive effect on the filtration medium
3. Fume amount is exposed to significant fluctuation with the changes in coal type and power generation load
4. Filtration velocity is generally about 1.0, the dust cleaning is mostly conducted by means of pulsed dust cleaning or rotary back blow
13RefrasilDouble twill760±20<30>2400>2000PTFE dipping
14RefrasilDouble twill760±202-5>2400>2000PTFE membrane
15RefrasilDouble twill760±20<30>2400>2000Acid resistance
16RefrasilDouble twill760 ±202-5>2400>2000PTFE membrane + Acid resistance
17E-glass (T)1/3 twill480±15<30>2000>1200Acid resistanceChemical industry
Features of working conditions of chemical industry
1. With a high initial density, carbon black is a nanoscale substance with a small particle diameter, specific gravity and strong adhesion.
2. The working temperature of main filter ranges between 270°C-280°C, that of waste filter is around 250°C.
3. The oil pre-heater has a working temperature >350°C, about 400°C, which requires cooling by water mist spray, while with a large amount of CO, SO2, SO3: contained in fume, it will generate sulfurous acid.
4. Flammable and explosive gas is involved, with a large amount of water vapor, and 1 ton of water sprayed can produce 1600m3 of water vapor
5. Inlet pressure 200pa, outlet pressure 3,500-4,000pa, counter-blowing pressure 5,000pa
18E-glassDouble twil550±15<45>2000>2000graphite

What are the conventional size and weight parameters of Reverse filter bags?

Thickness (mm)Diameter (mm)Length (mm)Weight (g/㎡)
Most commonly used dimensions150mm*1500mm、133mm*2000mm、133mm*2500mm
Most commonly used weight550g, 760
We can customize diameter, length, and weight for you

What industries are Reverse filter bags used in?

It can be used for a long time under the high temperature of 240 ℃, and the temperature resistance in a short time can reach 280 ℃. It is widely used in the high temperature flue gas filtration of steel, cement, power, non-ferrous metals, garbage incineration, asphalt concrete mixing, chemical industry and other industries. It is suitable for pulse and high-speed reverse blowing dust removal methods. It is the most widely used filter material for high temperature bag filter.

The cement industry

Cement kiln character

Cement raw material in the decomposition oven is not completely decomposed into caco3 dust

Together with CaO dust during the decomposition of the caco3 produced

For burning pulverized coal produced in the combustion process so2 nox co co2 and other gases

Kiln temperature exhaust gas from the cyclone out of more than 320 degrees drying gas

Dust concentration of dust particle size less than 10um accounted for more than 90%

Sometimes co content according to each of the combustion fluctuate

Each plant will require different filter bags.

For more details we have the configuration file for you to choose the right filter bag. Or you can visit us directly, we will give you full guidance and information related to your specifications.

Specific applications of dust filter bags in various working conditions:

Where to install filter bag installed in each industrial plant?

Scope of application for filter bag Cement plant:

Crushing, grinding, coal grinding, material transportation, dust removal on the top of the warehouse, raw metal grinding, cement grinding, packaging.

Metallurgical plants:

Electric furnaces, blast furnaces, desulfurization furnaces, induction furnaces, casting, sandblasting, barrel furnaces.

Power plant:

Material conveyor, smoke (powder) dust treatment, fly ash storage.

Aluminum plant:

Fluidized bed dry cleaning tower, venturi jet dry cleaning tower, carbon dust, anode crushing, electrolytic aluminum production dust.

Food plant:

Fluidized bed dry cleaning tower, venturi jet dry cleaning tower, self-baking dry cleaning tower, carbon dust.

Food/pharmaceutical plant:

Additives, drying section, flour/grain processing, sugar and pesticide tablets, packaging.

Chemical plants:

Plastic fibers, resins, tires/rubber, coking, bleaching powder, packaging.

Each plant will have different filter bags. For more detail, we have the configuration file for you to select the right filter bag. Or you can visit us directly, we will provide you our assistance and guidance to you.


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