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Filter Bag


Pleated filter Bags and filter Cartridges


1. Main products: two categories of medium alkaline and alkaline free glass fiber filter cloth(bag).
2. various types:heat treatment,silicone oil, graphite.
3. various thickness:0.3-0.5mm
4. various diameters

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In a reverse air bag house, the dirty air flows from the inside-to-outside, so that the dust collects on the inside of the filter bag. The filter bags are tubular, open at the bottom and connected to a tube sheet. They are supported from the top through a spring or J-bolt suspension system. The gas flow is reversed to initiate filter bag cleaning. Anti-collapse rings are sewn onto the outside of the bags at 3 to 4 foot intervals to prevent total collapse of the bags during the reverse air cleaning. Filter bags are cleaned one compartment at a time in the off-line mode.

Typical Reverse Air Filter Bag Tension

5" diameter

35 lbs.

8" diameter

50 lbs.

11.5" diameter

50 lbs. (Polyester)

11.5" diameter

75 lbs. (Fiberglass)

Polyester filter bag
polyester filter bag are made of 100% filament polyester fiber,after needle punched, singed heat set calender for the raw polyester filter felt material, then polyester filter felt can be sewn into polyester filter bags.                
Available Finish: singed,calendar,heat set PTFE membrane,W/O,anti-static treatment.

Polyester bag filters Breaking Elongation is less than 20% for MD and 40% for CMD,low dry shrinkage, can work well in the 130 deg C. the material is cheaper than other material, so widely used in a lot of bag house system.

Technical data
Reverse Fiberglass filter bag
Glass fiber filter cloth is made of the fiberglass yarn,with special treatment like graphite,silicon,ptfe dipping, against acid treatment and other chemical treatment. it is an ideal high temperature resist filter cloth the fiberglass filter bags are widely used in industrial dust clean area,bag house, air pollution and valuable dust recycling, etc.
The reverse fiberglass filter bag usually used the 450gsm to 550gsm fiberglass filer fabric.

1. good heat resistance, suitable for long-time use under a temperature below 280 deg.
2. good dust peeling performance, low power coindumption 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:except hydroelectric acid strong acid,and strong alkaline, it is more stable than other filter medium.
5. The fiberglass filter fabric is not absorbing moisture and humidity
6. filtering efficient of the fiberglass filter bag can be over 99.5%etc and catch the dust below the PM2.5,we can get the 20mg air release.
7.High strength of the fiberglass filter cloth, can be more than 3000N/5*20cm

Related parts are as following:
Filter bag caps
Filter bag venturi
Filter bag chain
Filter bag hook

1. Operation temperature 150 Deg c,
2. the max surge is 150 deg c.
3. good anti-acid, good  anti-alkali ,good hydrolysis stability
4. Mean Air Permeability: 10-15 m3/m2/min@12.7mmH2O
5. It is the cheapest filter media in the bag filter filtration field. Polyester bag filter is the most popular items in the bag house system.   

Polyester filter bag widely used in mine, limestone, cement, iron and steel industries,alumina delivery, electrolytic aluminum, non-ferrous metal production, wood processing, food processing and pharmacy industry.

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