Filter bags

Filter bags are the de-dusting elements. As expendable equipment, their design and manufacture are the key factors which determine their lifetime and effectiveness. A fit selection of fabric is fundamental, when designing a filter bag.

Every baghouse operates under specific parameters. For the proper selection of filtering fabric, it is crucial to consider many characteristics of the crude air, such us temperature, humidity, particle size, concentrations of acid, alkalis, abrasive ability of particles and many more.

In Astrofil we have the ability to manufacture filter bags of every size and geometry (cylindrical style, envelop style etc cassette style or multi bags) and every type of suspension like snap ring or O- ring. We respond to the most difficult situations with reliable and effective suggestions on materials and designs. Filter bags are available in every type of needle felt fabrics and woven fabrics

Every filter bag is sewed with single piece thread of high tensile strength and manufactured under strict quality control, making them reliable and long living.

Needle felt filter bags are used in Jet pulse cleaning systems, while woven filter bags are used in mechanical or reverse air cleaning systems.

We have in stock most of the fabric types thus, we are able to deliver even large quantities of filter bags in short notice. We are able to manufacture up to 500 pieces of cylindrical filter bags, per day.

 

 

Filter bag fabrics and geometries

Filter bags:

Dimension and technical features

We can produce filter bags of any type and size. Our company is able to manufacture cylindrical, envelop type filter bags, or according to customer’s sketches.

Every filter bag is sewed and available with many additional features like reinforced bottom, snap ring or regular metal ring and many different suspension designs like sewed cord or rubber around the open end or hanging noose sewed at the bottom.
Our snap rings are made from either steel or stainless steel and are carefully designed for perfect fit, sealing and easy replacement of filter bags.

  • Filter bags are made from the following textile categories:

Needle felt, suited for Jet Pulse or mechanical cleaning system. Weight varies from 250gr/m2 έως  850gr/m2

Fiber type Designation according to DIN 60001 part4
Polyvinylchoride PVC
 Polypropylene PP
Temprature resistant Olefin PP
Polyamide PA
Polyacrylnitrile copolymer PAN
Polyacrylnitrile homopolymer PAN
Polyester PE
M-Aramide AR
Polyphenylensylfide PPS
Polyimide PI
Polytetrafluorethylene PTFE

 

Filtering particles down to 0,5 μm

Woven textiles, (polyfilament – monofilament) suited for  special applications. Textiles are compatible with mechanical filter bag cleaning systems. Weight varies from 150 gr/m2 up to 5.860 gr/m2.

Fiber type Designation according to DIN 60001 part4
Polyvinylchoride PVC
 Polypropylene PP
Temprature resistant Olefin PP
Polyamide PA
Polyacrylnitrile copolymer PAN
Polyacrylnitrile homopolymer PAN
Polyester PE
M-Aramide AR
Polyphenylensylfide PPS
Polyimide PI
Polytetrafluorethylene PTFE
Fiberglass FG

 

Filtering particles down to 1 μm

Woven textiles are best suited for wet filtration

Designation according to DIN 60001 part4 Temperature
Operating/Max
Resistance

to

hydrolysis

Resistance

to

acid

Resistance

to

alkalis

Resistance

to

oxidization

PVC 75oC / 80oC •••• •••• •••• •••
PP 90oC / 100oC •••• •••• ••••
PP 125oC / 130oC •••• •••• ••••
PA 110oC / 115oC •• ••• ••
PAN (c/p) 110oC / 115oC ••• •• •• •••
PAN (h/p) 125oC / 140oC ••• ••• •• •••
PE 150oC / 150oC •• •••
AR 200oC / 220oC •• •• •• •••
PPS 190oC / 200oC •••• •••• •••• ••
PI 240oC / 260oC ••• ••• •• •••
PTFE 250oC / 280oC •••• •••• •••• ••••
FG 371oC / 427oC •••• •••• ••• ••••

•••: Excellent •••: Good ••: Moderate  •: Restricted

 

Basic

Surface treatment

PVC PP/

RO

PA AC DT PE NO/NX PPS PI PTFE FG
Singed on one side  
Not singed
Calendered on both sides
Calendered super smooth o o o o o  
  • = Standard
    o = Upon request

 

Additional Treatment PVC PP/

RO

PA AC DT PE NO/NX PPS PI PTFE
Cleanability supporting finish
Oil and water repellent finish
PTFE surface coating o o
Protection from acids and hydrolysis
PTFE fiber impregnation o o o o o  
Spark resistant Layer   o o o o
Conductive by addition of stainless steel fibers o o o o
Increased conductivity by structured stainless steel fibers addition o
Antistatic treatment o o o o o o o o
  • = Standard
    o = Upon request