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HANGZHOU GRACE ENVIROTECH CO., LTD
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P84 filter bags

P84 filter bags

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GRACE Filter have selected INSPEC FIBERS polyamide fibers from AUSTRIA LENZING COMPANY, guided by the foreign professional company and then we produced the P84 high temperature resistant needle punched filter felt-one new type of high temperature resistance.
GRACE Filter P84 Filter felt has excellent superfine particle collecting efficiency and small operating pressure difference.
It is usually used in gypsum plant, cement plant, waste incinerator, liquid bed boiler, coal-fired boiler etc.
Name
P84/TF1554
Material
Fibre
100%P84
Scrim
100%PTFE
Weight(g/m2)
550
Thickness(mm)
2.2
Density(g/m3)
0.23
Air permeability (L/dm2.min)
150
Breaking Strength(N/5cm)
TD
1000
LD
800
Elongation@200N/5cm
TD
<3
LD
<3
Shrinkage@90min
Temp(℃)
260
%
≤2
Temperature(℃)
Continuous
240
Peak
260
Treatment
Heat set, singed, calender
Filter bags, dust collector bags, dust bags, filter socks, bags, tubes, socks - they all mean the same thing: An industrial grade fabric filter made from heavy duty material, all textile based, used in dust collecting systems, in either process filtration or pollution control.
Dust bags come in 5 basic designs:
Pulse jet bags (bottom loader or bottom removal)
Pulse jet bags(top loader or top removal)
Shaker design
Reverse air design
Envelope bags
Pulse jet bags are cleaned using compressed air to mechanically "pulse" or snap the bag periodically so that the built up filter cake is discharged and the flow through the media is returned to its higher air permeability. Pulse jet bags are installed on wire cage supports and filter from the outside/ in. In the bottom load design, bags are pre-installed on their cages and then attached to a mounting thimble or cup which hangs down from the underside of the tube sheet. The tube sheet is a metal plate with regularly spaced holes which serves as the top of the gas tight metal box known as a dust collector. The top edge of the bottom loading bag is normally tucked into the cage and the entire assembly is attached to the thimble or cup with a hose clamp.
Installation of bottom loading bags is more difficult because of being on the dirty side of the collector and having no catwalks or surfaces on which to stand. Some bottom loaders are on the top of large storage bins on tall silos which make installation potentially dangerous. Bottom loader collectors are frequently used when headroom above the






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