Aramid Filter Bag For Dust Filtration
Bags
1. SpecificationMata-aramid is manufactured by the polymerization of aromatic
amides to form poly(m-phenylene isophthalamide). Meta-aramid
filtration fabrics provide filtration at higher temperature than
polyester or acrylic, withstanding 204℃ dry heat and 177℃ in conditions of high moisture. Meta-aramid has poor resistance to
acidic conditions but good at alkaline conditions.
Finish Treatment: Singeing, Calendering, Heat Setting, Anti-static, Water&Oil
Repellent, PTFE Membrane, PTFE Impregnation and so on
Bag Style: round bags, oval bags, 8 and 12 star/ pleats star bags
Bag Size: it is up to the CPO and installation and customized
Bag Head: seal cuff / groove snap / felt strip, bead cuff/ steel strip, etc
can be chosen
Bag Body: Sewing or Hot sealing
Bag Bottom: Single or double bottom, with reinforcement or without
reinforcement
Construction of Filter Bags
| Style | Size | Felt/ Fabric | Body | Head | Bottom Layer | Reinforcement |
| Round, Oval, Star/pleat | Customized | Various | Sewing or Hot Sealing | Seal Cuff, Bead Cuff | Single Or Double | With Or Without |
Parameters of Aramid Filter Bags
| Bag | Aramid Filter Bag |
| Felt | Aramid Needled Felt |
| Scrim | aramid |
| Weight | gsm | 500-550 |
| Permeability | cfm | 30-40,PTFE lamination 3-7 |
| Tensile Strength | Warp | ≥N | 900 |
| Weft | ≥N | 1000 |
| Break Elongation | Warp | < % | 20 |
| Weft | < % | 50 |
| Working Temperature | Continuous | Dry | ℃ | 204 |
| Moist | ℃ | 177 |
| Short term | ℃ | 240 |
| Dry Shrinkage | Warp | <% | 1.5 |
| Weft | <% | 1.5 |
| Specific Density | 1.38 |
| Support Combustion | no |
| Resistance | Hydrolysis | poor |
| Biological (mildew, bacteria) | no effect |
| Alkalis | good |
| Mineral Acids | fair |
| Orgnic Acids | fair |
| Oxidising Agents | poor |
| Orgnic Solvents | very good |
| Finishing | singeing, calendaring, oil and water proof, PTFE impregnation
coating, PTFE lamination etc |
|
Cages
1. Specification
Cages are frameworks for bags, which is the bone of bags and
supports the bags running. Both bags and cages are the most
important element for bag houses. Star Cages are welded by special
supporting rings (Spiders). We have own stretch line, cut line,
weld line, coating line and check equipment. Providing a wide range
of star filter cages for bag house collector, which improve the
performance, efficiency and bottom line of the bag house dust
collector and flue.
Procedure of cage making
| 1 | stretch line | streth 6 or 6.5 raw wire to roll diameters wires for cages,
normally 3mm, 3.5mm and 4mm, |
| 2 | cut line | cut roll wires to fixed length based on cage sizes |
| 3 | weld body | weld vertical wires and suppoting ring together |
| 4 | weld top and bottom cap and venturi | weld top and bottom cap to cage, venturi if necessary |
| 5 | coating | silicon or zinc coating if necessary |
| 6 | inspect and fix | inspect weld loose, burs, coating etc and fix |
| 7 | pack | put cages into steel crates |
Cage Style: round cages, oval cages and pleats star cages
construction of cages
| style | Vertical Wire QTY | Diameter of Wire | Supporting Ring | Top Cap | Bottom Cap | Connection |
| round cage | 8-24 | 4 / 3.5 /3.2 /3 | wire, round | optional | weld, crimp, wire bent | twist lock, sure lock, finger lock |
| oval cage | 10, 14 | 4 | wire, oval | oval | weld | slide lock |
| star/ pleat cage | 8,10, 12, 16 | 4 | press, wire | optional | weld or wire bent | global joint |
Optional Material: carbon steel, galvanized wire, stainless steel
Cage Diameter: customized
Star Cage Finish Treatment: silicon coating, zinc coating, electrophoresis coating
Cage Head: normal top cap, venturi top cap, split top (Mikropul) cap, wires
bent (hook) top, enlarged top ring etc
Cage Connection: cages were too long or top space of bag house was not enough, we
suggest make cages in sections with joint like below
Cage Pack
