High-Performance Envelope Filter Bags for Industrial Dust Collection
What is an Envelope Filter Bag?
An Envelope Filter Bag, also known as a flat filter bag, is characterized by its rectangular, slim profile. Unlike traditional cylindrical bags, the envelope design allows for a significantly larger surface area within a compact baghouse volume. These bags are typically supported by an internal metal frame (stiffening rings or multi-wire cages) to maintain their flat shape during pulse-jet or mechanical shaking cleaning cycles.
High-Performance Envelope Filter Bags for Dust Collection
Custom-engineered flat filter bags designed to maximize filtration area in compact spaces. Durable, efficient, and built for harsh environments.
- Large filtration surface in a small footprint.
- Available in Polyester, PPS, Nomex, and PTFE.
- Precision fit for all major OEM brands.
- Space Efficiency: Maximize air-to-cloth ratio in restricted installation spaces.
- Enhanced Dust Release : The flat surface allows for more uniform pulse energy distribution, ensuring thorough dust cake removal.
- Minimized Abrasion : Specialized reinforced edges and seams reduce mechanical wear against the support cages.
- Low Pressure Drop : Increased surface area leads to lower resistance, reducing energy consumption for your fans.
Common Materials :Polyester, Aramid (Nomex), PPS, PTFE, Fiberglass
Max Temperature :Up to 260°C (500°F) depending on fabric
Surface Treatment :Singed, Calendered, PTFE Membrane, Anti-static, Water & Oil Repellent
Filtration Efficiency :Up to 99.9% (PM 2.5 compliant)
Customization :Full range of sizes and top/bottom configurations
Optimized Space Utilization & Maximum Filtration Area
Compared to traditional round bags, the flat “envelope” geometry allows for a more compact arrangement within the baghouse. This design increases the effective filtration area by up to 25-40% within the same footprint, making it the ideal solution for plants with restricted installation space.
Exceptional Pulse Cleaning Efficiency
Our envelope bags are engineered to respond more effectively to pulse-jet cleaning. The slim profile ensures that the compressed air pulse reaches the entire surface of the bag uniformly. This results in more thorough dust cake release, lower operational pressure drop, and significant energy savings for your induction fans.
Superior Structural Integrity & Anti-Collapse Design
Each Pulse Jet Filter Bag in envelope style is reinforced with specialized side-seam stitching and integrated stiffening ring options. These features prevent the bag from collapsing against the cage under high negative pressure, reducing mechanical wear and extending the service life by 30% compared to standard flat bags
Precision Fit for Zero-Leakage
We use advanced laser-cutting technology to ensure the bag head (snap ring or flange) matches your cell plate with 100% accuracy. This precision engineering eliminates “bypass” dust, ensuring your system meets the strictest environmental emission standards (less than 10mg/m³).