Pleated filter bags
A compact pleated surface for selected baghouse retrofits: shorter element, more area in the existing tube sheet and faster installation, subject to pulse, dust and geometry checks.
A pleated bag is not a standard cartridge
It fits a baghouse tube sheet and may use a snap band, flange, threaded bush or PU ends. High-temperature aramid, PPS and fibreglass variants in this category must therefore not be presented as standard air cartridges.
This site limits a standard cartridge filter to a maximum of 135 °C. The higher values below apply only to specifically engineered pleated bags and require a complete-assembly datasheet.
Temperature is confirmed for the complete assembly
The table gives category guidance, not universal ratings. Adhesive, end caps, gasket, cage, acids, alkalis, oxygen and hydrolysis can reduce the allowable duty.
- Typical guidance
- Typically 110–120 °C; selected assemblies to 135 °C
- Typical duty
- Dry abrasive dust and frequent cleaning
- Main limitation
- Hydrolysis, chemistry and end materials
When a retrofit genuinely delivers value
A larger nominal area does not guarantee better performance: tightly packed pleats may clean poorly with sticky or coarse dust.
- 01Geometry
Tube-sheet opening, length, diameter, pitch and service space.
- 02Pulse
Pressure, volume, nozzle, venturi, duration and air dryness.
- 03Dust
Size, stickiness, moisture, abrasion, charge and loading.
- 04Aerodynamics
Area, velocity, ΔP, flow distribution and hopper discharge.
Where it works and where it does not fit
- An existing tube sheet with limited element length — more area from a shorter bag
- Dry abrasive dust and frequent cleaning — spunbond polyester
- Fine, sticky or difficult-release dust — with a PTFE membrane
- Hot dry dust, kilns and power — only a specifically engineered aramid, PPS or fibreglass assembly
- Without a check of tube sheet, pitch, pulse system and aerodynamics
- Tightly packed pleats on sticky or coarse dust — they clean poorly
- Temperature, acids, alkalis and hydrolysis not confirmed by the complete-assembly datasheet
- Duties where a conventional long bag remains more reliable
Frequently asked questions
Can every bag be replaced by a pleated element?
No. Tube sheet, pitch, pulse system, dust, temperature and aerodynamics must be checked. A conventional long bag may remain more reliable in some duties.
Why cannot 200 °C be applied to a standard cartridge?
Because it may be a fibre-only limit, while a standard cartridge is also limited by adhesive, end caps, cage and gasket. This site sets 135 °C as the maximum for a standard cartridge.
What is needed to make an equivalent?
A sample or drawing, media, temperature, chemistry, end dimensions, gasket, airflow direction and pulse-cleaning data.
Bag types in 3D
Related guides
Why a high-temperature pleated bag is not a standard cartridge and what to check before retrofitting a baghouse.
Open →Cartridge temperature limit
3DWhy the standard cartridge maximum is 135 °C: media, adhesive, end caps, cage and gasket are rated as one assembly; the PET samples state 120 °C continuous.
Open →Filter bag mediaA filter bag media selection matrix by temperature, gas chemistry, moisture, abrasion and specialist finishes.
Open →We verify the collector before a trial set is ordered
We survey dimensions, ΔP and cleaning performance, then propose a controlled trial batch.