Product description
Extended life polyester filter bag for longer service intervals
The Extended Life Polyester Filter Bag is designed for liquid filtration applications where a standard felt polyester filter bag does not provide sufficient service life. While maintaining the simplicity and ease of use of conventional felt filter bags, the extended life construction delivers higher dirt holding capacity and longer operating cycles.
This filter bag is often selected as a direct upgrade from standard polyester felt bags to reduce change out frequency and operational downtime.
Filtration principle
The Extended Life Polyester Filter Bag operates using depth filtration. Liquid flows from the inside to the outside of the bag, with particles retained throughout the thickness of the felt media rather than only on the surface.
Compared to standard felt filter bags, the extended life media structure allows:
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improved contaminant distribution
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slower pressure rise
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longer service life
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more stable filtration performance
All retained contaminants remain inside the filter bag, simplifying disposal during change out.
Extended life media design
The filter bag is manufactured from specially engineered polyester felt designed to increase dirt holding capacity without compromising filtration efficiency. The extended life structure allows higher contaminant loading before the pressure drop reaches the change out limit.
This design:
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extends filter change intervals
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reduces filter consumption
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lowers maintenance frequency
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improves overall process efficiency
The extended life polyester media is particularly effective in applications with moderate to high particulate loading.
Design and construction
Extended Life Polyester Filter Bags are manufactured from high quality polyester fibers and fitted with a top sealing ring to ensure correct positioning inside the support basket.
Typical design features include:
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extended life polyester felt filtration media
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inside to outside filtration design
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secure sealing ring to prevent bypass
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compatibility with perforated or mesh support baskets
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suitability for standard industrial bag filter housings
The filter bag retains its shape during operation, supporting reliable and consistent performance.
Performance characteristics
Typical performance characteristics include:
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wide range of available micron ratings
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higher dirt holding capacity than standard felt polyester bags
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stable pressure drop behaviour
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predictable service life
These characteristics make extended life polyester filter bags suitable for continuous and batch filtration processes.
Material compatibility
Polyester provides good compatibility with a wide range of industrial liquids and offers higher temperature resistance than some other polymer filter media. Compatibility should always be confirmed for specific process conditions.
Typical applications
Extended Life Polyester Filter Bags are commonly used in:
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coatings and paints
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chemical processing
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food and beverage production
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wastewater treatment
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ink and pigment processing
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surface water filtration
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acids, solvents and process chemicals
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pre filtration before membrane systems
Key benefits
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Longer service life compared to standard felt polyester bags
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Reduced filter change frequency
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Lower operational costs
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Simple installation and clean change out
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Wide application compatibility
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Direct retrofit for standard bag filter housings
Configuration and quotation
Extended Life Polyester Filter Bags are supplied based on application requirements. Selection parameters include:
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micron rating
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bag size
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process liquid characteristics
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operating conditions
Filtra International can support correct filter bag selection to optimise performance and service life.