Products Description Teflon filter bags, commonly known as PTFE filter bags, is a filtration element with PTFE material as its core. Because of its excellent water repellency, oil repellency and air permeability, it is often used in high temperature flue gas treatment (e.g. glass kiln, smelting)...
Teflon filter bags, commonly known as PTFE filter bags, is a filtration element with PTFE material as its core. Because of its excellent water repellency, oil repellency and air permeability, it is often used in high temperature flue gas treatment (e.g. glass kiln, smelting) process.
Unmatched heat resistance
Engineered to operate flawlessly at 240°C (464°F) with zero degradation-even during thermal spikes up to 260°C (500°F). Ideal for cement kiln exhaust (e.g., capturing PM2.5 dust at 240°C) or incinerator flue gas cleanup, where lesser bags melt or shrink.
Chemical resistance, field-proven
The bags are resistant to more than 98% of industrial acids, bases and solvents, including HF acid, chlorine and methyl ethyl ketone. Case Study: After switching to our PTFE (Teflon) filter bags for H₂SO₄ mist filtration in a titanium dioxide plant, the number of bag changes was reduced from 6 per year to every 18 months.
Sub-Micron Accuracy, Zero Compromise
Filtration efficiency of 99.97% for particles as small as 0.3 µm is achieved with our membrane-laminated PTFE variants. Critical for pharmaceutical API recycling or lithium battery powder handling, where the risk of cross-contamination requires absolute reliability.
Abrasion-Resistant Defense Design
These bags are reinforced with PTFE hybrid stitching (optional) to resist abrasive dusts such as aluminum oxide or silica. Lab-tested to withstand over 50,000 pulse jet cleaning cycles without seam failure.
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Characteristics |
Teflon filter bag |
Ordinary filter bag (e.g. polyester, PPS) |
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Temperature resistance |
-70C~260℃ (long-term) |
≤160℃ (easy to heat shrinkage) |
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Corrosion resistance |
Full acid and alkali resistance, life span extended by 3-5 times |
Resistant to weak acid/alkali only, easy to hydrolyze and oxidize |
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Filtration precision |
0.1 micron grade (membrane-coated type) |
1-10 micron (deep filtration) |
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Operating resistance |
Low resistance (air permeability ≥90 L/㎡.s) |
Easily clogged, high resistance fluctuation |
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Maintenance cost |
Dust removal cycle extended by 50% |
Frequent replacement, high labor cost |
High-temperature industrial dust removal:
Glass Manufacturing: Filtering 260℃ kiln fume, reducing impurities on glass surface and improving yield.
Power/Iron & Steel: Handle the flue gas of coal-fired boiler and sintering machine to meet the ultra-low emission standard (PM≤10mg/m²).
Chemical & Petroleum:
Acid mist purification: such as hydrochloric acid, sulfuric acid mist recovery, resistant to corrosive gases such as hydrogen gasification.
Petroleum storage tank filtration: interception of oil in the gum, metal particles, to extend the life of the equipment.
Electronics and pharmaceuticals:
Semiconductor workshop: air purification, intercepting 0.1 micron dust and metal particles, to protect the cleanliness of chip production.
Pharmaceutical purification: filtration of solvents and liquids under high-temperature sterilization environment, in line with GMP standards.
Environmental protection and new energy:
Waste incineration: processing of high-temperature flue gas containing dioxin, corrosion resistance and no secondary pollution.
Lithium battery material production: filtration of impurities in the electrode slurry to improve battery performance.
Selection basis
Working temperature: more than 180 ° C need to choose pure PTFE or glass fiber substrate coating type.
Media properties: oil, viscous dust preferred hydrophobic membrane filter bag.
Installation and maintenance
Avoid mechanical damage (such as metal frame burrs), and ensure the sealing of the bag mouth during installation.
Suggestions for ash cleaning: use pulse blowback, pressure ≤ 0.5MPa, to avoid high-frequency ash cleaning damage to the membrane layer.
Customization service
supports customization of non-standard size (diameter 100-300mm), interface form (flange/spring ring) and special function (anti-static, anti-bacterial).
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