Water & Oil Repellent Filter Bags
Water & Oil Repellent Filter Bags are industrial dust collector filter bags treated with advanced hydrophobic and oleophobic surface finishing technology. The treatment forms a protective layer around the fibers, helping prevent moisture penetration, oil mist contamination, sticky dust adhesion, and premature filter media blockage.
They are widely used in industries where dust collection systems are exposed to humidity fluctuations, condensation risks, oily particulate matter, and moisture-containing flue gas streams.
Key Benefits: Excellent moisture resistance, reduced sticky dust adhesion, improved pulse cleaning performance, lower differential pressure rise, and extended filter bag service life in humid operating environments.
How Water & Oil Repellent Treatment Works
Hydrophobic Protection
Creates a water-repellent barrier around the fibers, helping prevent moisture absorption and condensation penetration.
Oleophobic Protection
Reduces oil mist adhesion and prevents sticky dust from attaching firmly to the filter surface.
Improved Dust Release
Dust cake is released more easily during pulse cleaning cycles, reducing operating resistance.
Reduced Filter Blockage
Helps minimize mud formation, dust hardening, and surface blockage caused by moisture exposure.
Technical Specifications
| Item | Technical Data |
|---|---|
| Base Material | Polyester / Acrylic / Aramid / PPS Needle Felt |
| Treatment Type | Hydrophobic & Oleophobic Surface Treatment |
| Weight | 450–550 g/m² |
| Thickness | 1.8–2.4 mm |
| Continuous Operating Temperature | Depends on Base Filter Media |
| Air Permeability | Slightly Lower Than Untreated Media |
| Moisture Resistance | Excellent |
| Oil Resistance | Good |
| Dust Release Performance | Improved |
| Surface Treatment | Water & Oil Repellent + Optional PTFE Membrane |
Main Advantages
Prevents Moisture Penetration
Reduces filter blockage caused by condensation and moisture absorption.
Reduces Sticky Dust Adhesion
Improves dust release performance in oily and humid dust collection environments.
Improves Pulse Cleaning Efficiency
Dust is removed more easily during pulse jet cleaning cycles.
Reduces Differential Pressure Rise
Helps maintain stable airflow and lower operating resistance.
Extends Filter Bag Service Life
Reduced moisture absorption helps slow fiber degradation.
Improves Operational Stability
Particularly effective in environments with fluctuating humidity levels.
Limitations & Considerations
- Additional treatment increases manufacturing cost
- Water & oil repellent performance gradually decreases over time
- Slight reduction in air permeability compared with untreated media
- Not a complete solution for severe condensation problems
- Limited protection against strong acid or alkali gas corrosion
Typical Industrial Applications
Cement Industry
Coal mill dust collection systems with moisture fluctuation.
Power Generation Industry
Coal-fired boiler baghouse filtration systems.
Waste Incineration Industry
Humid flue gas filtration and combustion exhaust systems.
Asphalt Industry
Asphalt mixing plant exhaust filtration systems.
Food & Chemical Industry
Powder handling and conveying systems with oily particulate.
Biomass Boiler Systems
Combustion systems with high moisture flue gas conditions.
Water & Oil Repellent Filter Bags are highly recommended for dust collection systems operating in humid, oily, or condensation-prone environments. When combined with PTFE membrane lamination, they provide even better filtration efficiency, dust release performance, and long-term operational stability.
