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GUANLIN PPS envelope filter bag, polyphenylene sulphide bag for coal fired boiler and acid flue gas.
PPS envelope construction filter bags for coal fired boilers and acid-bearing flue gas, with the chemical resistance that polyester cannot provide.
Description
Coal fired boiler flue gas carries sulphur oxides that turn into acid when the gas cools, and acid attacks ordinary filter media from the inside. PPS is chosen for this duty because it holds its strength in acid-bearing gas at temperatures that would destroy polyester, and because the envelope construction keeps the seam area away from the direct dust impingement zone.
Why Choose GUANLIN PPS Envelope Filter Bags
- 190°C continuous — suited to boiler flue gas temperatures.
- Excellent acid resistance — survives SOx-bearing gas.
- Envelope construction — protected seams at low-wear positions.
- High tensile strength — resists pulse cleaning fatigue.
- Good hydrolysis resistance — handles moderate moisture.
- Proven in boilers — the standard choice for coal flue gas.
Application Scenarios
Coal fired boilers
Flue gas dedusting with sulphur content.
Biomass boilers
Acid-bearing combustion gas.
Waste incinerators
Aggressive flue gas chemistry.
Municipal solid waste plants
Acid gas and high temperature.
Metal smelting off-gas
Sulphur-bearing process gas.
Chemical process flue gas
Corrosive high temperature streams.
Our Factory
GUANLIN has manufactured filtration products in Dongguan since 2003, operating a 6,000 m² plant with automated filter bag sewing lines, automated singeing equipment, cage welding systems and pleated filter production lines. Products are exported to Singapore, Vietnam, Malaysia and other markets, with ISO 9001 and ISO 14001 certified quality management.
Product Specifications
| Item | Specification |
| Media | PPS needle felt |
| Construction | Envelope bag |
| Max Temperature | 190°C continuous |
| Acid Resistance | Excellent |
| MOQ | 50 pcs |
FAQ
Q1. Can it run above 190°C?
Short peaks are tolerable; sustained operation above 190°C shortens life sharply.
Q2. Is it good in high oxygen?
PPS is sensitive to oxygen above about 8%; consider PTFE for high-O₂ duty.
Q3. Does it handle moisture?
Moderate hydrolysis resistance, but avoid running below the dew point.
Q4. MOQ and lead time?
50 pcs, 10–20 days.
Key Specifications
- Media: PPS (polyphenylene sulphide) needle felt
- Max temperature: 190°C continuous
- Acid resistance: excellent
- MOQ: 50 pcs
