Pleated bag or cartridge
Why a high-temperature pleated bag cannot be treated as a standard cartridge and how to verify a retrofit before upgrading a baghouse.
A pleated bag is a separate technology
It fits a baghouse tube sheet and may use a snap-band, flange, threaded bush or PU ends. It may use high-temperature substrates (aramid, PPS, fibreglass), but pitch, pulse system, pleats and dust must be checked. A pleated surface alone does not make it a standard cartridge.
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. Keeping the categories separate removes a hazardous temperature-data error.
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.
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.
Why is a pleated bag treated separately?
It fits a baghouse tube sheet and follows different geometry and cleaning checks. Its high-temperature media ratings cannot be automatically applied to 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.
Compare the three elements
On this topic
A compact pleated bag for baghouse retrofits: shorter element, more area in the existing tube sheet and faster installation, subject to pulse, dust and geometry checks.
Open →Cartridge temperature limitWhy 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 →Baghouse or cartridge collectorCompact fine-dust duty versus high loading, temperature and severe operation — how to compare the two technologies.
Open →An engineer will answer your question
We review the specification, identify missing measurements and propose a process arrangement and supply scope.