Filtration
Application of our filter systems:
- Metallurgy (steelworks, and cast shops)
- Non-metallic mineral processing plants, CEMENT works
- Waste burning plants
- Conditioning and recycling factories
- Animal feed and food industry
- Pharmaceutical and chemical industry
- Energy technology and power plants and
- Metal processing plants and wood factories
| Type of fiber | Cotton | Polyamide | Poly-propene | Poly- ester | Acrylic copolymer | Acrylic homopolymer |
| Abbr | CO | PA | PP | PES | PAN | PAN |
| Temperature during prolonged heating | ||||||
| In dry heat | 80°C | 100°C | 90°C | 150°C | 120°C | 125°C |
| In humid heat | 80°C | 100°C | 90°C | 94°C | 100°C | 125°C |
| Peak temperature in dry heat | 100°C | 120°C | 100°C | 160°C | 120°C | 140°C |
| Relative humidity sorption | 8,50% | 4-4,5% | 0,10% | 0,40% | 1,00% | 2% |
| Density g / cm | n.a | 1,14 | 0,91 | 1,38 | 1,18 | 1,18 |
| Oxygen Index | n.a. | 20-21 | 19-20 | 20-22 | 18 | 18 |
| relative stability | ||||||
| Base | + | + | +++ | ++ | - | |
| Acid (inorganic) | -- | -- | +++ | + | ++ | |
| Acid (organic) | -- | -- | +++ | + | +++ | |
| Oxidants | - | - | + | + | + | |
| Organic solvents | ++ | ++ | +++ | ++ | ++ |
| Type of fiber | Melamine-formaldehyde resin | M-Aramid | Ryton | Polyimide | Teflon | Alkali-free glass | Alkali-free glass |
| Abbr | ME | AR | PPS | PI | PTFE | GLAS | GLAS |
| Temperature during prolonged heating | |||||||
| In dry heat | 180°C | 180°C | 180°C | 200°C | 250°C | 260 °C | 372 ° C |
| In humid heat | 180°C | 160°C | 170°C | 160°C | 250°C | 260 °C | 372 ° C |
| Peak temperature in dry heat | 220°C | 200°C | 190°C | 200°C | 260°C | 280 °C | 427 ° C |
| Relative humidity sorption | 5% | 4,5% | 0,60% | 3% | 0% | 0,1 % - 0,4 % | 0,1 % - 0,4 % |
| Density g / cm | 1,4 | 1,38 | 1,7 | 1,42 | 2,1 | 2,4 - 2,6 | 2,4 - 2,6 |
| Oxygen Index | 33 | 27-28 | 40 | 38 | ›40 | ›90 | ›90 |
| relative stability | |||||||
| Base | + | + | +++ | - | +++ | + | + |
| Acid (inorganic) | - | - | ++ | + | +++ | + | + |
| Acid (organic) | - | - | ++ | + | +++ | + | + |
| Oxidants | -- | -- | - | - | +++ | +++ | +++ |
| Organic solvents | ++ | ++ | +++ | - | +++ | +++ | +++ |
Filter bag WALER GMTEX
| Technical description | Nonwoven Needlefelt PTFE |
| Surface layer | 100% PTFE (TEFLON) |
| Basic structure | 100 % PTFE (TEFLON) |
| Colour | Brown |
| Fabric | PTFE 750 g /m² + special layer |
| Fabric treatment | GMTEX, Protection against acids and hydrolysis, water-repellent, oil-repellent TEFLON |
| Surface density (acc. DIN EN ISO 29073 T1) |
750 g/m² |
| Thickness | 1,4 mm |
| Air permeability (DIN 53887) | 100 l/dm² * min (at dp=200 Pa) |
| Trade mark | WALER GMT |
| Breaking strength (acc. DIN EN ISO 29073 T3): |
|
longitudinally |
> 600 N / 5 cm |
transverse |
> 650 N / 5 cm |
| Working / Maximum operation temperature | 240/260 °C |
| Acid resistance | very good |
| Alkali resistance | very good |
| Hydrolysis resistance | very good |
| Dimensions | diameter: 120 mm, length: 5020 mm, total length: 5035 mm |