Polypropylene felt filter bag

Polypropylene felt filter bag

1 Micron / Size 1 - 7” x 16” (±18cm x 41cm) / Polypropylene Collar
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Polypropylene felt filter bag
  • Polypropylene felt filter bag
  • Polypropylene felt filter bag
Polypropylene felt filter bag

Polypropylene felt filter bag

Micron Rating
Bag Size
Ring Type

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Product description

Polypropylene felt filter bag for industrial liquid filtration

The Polypropylene Felt Filter Bag is a core filtration product for industrial liquid filtration applications where reliable particle removal, chemical resistance and cost-effective operation are required. It is widely used as a primary filtration stage or as pre filtration to protect downstream equipment.

Manufactured from high quality polypropylene felt, this filter bag provides depth filtration, allowing contaminants to be captured throughout the thickness of the media rather than only on the surface. This results in stable filtration performance and predictable service life.

Polypropylene felt filter bags are among the most commonly used filter bags across industry due to their versatility and broad chemical compatibility.

Filtration principle

The polypropylene felt filter bag operates using inside to outside depth filtration. Process liquid enters the bag, flows through the felt structure and exits the housing, while particles are retained within the felt matrix.

This depth filtration principle provides:

  • consistent particle retention

  • good dirt holding capacity

  • stable pressure drop behaviour

  • reduced risk of surface blinding

All contaminants remain inside the filter bag, enabling clean and simple disposal during change out.

Material characteristics

Polypropylene felt offers an excellent balance of filtration performance and chemical resistance. The material is suitable for a wide range of industrial liquids and process conditions.

Key material characteristics include:

  • excellent resistance to acids and alkalis

  • good compatibility with many solvents

  • resistance to oxidising agents

  • silicone free construction

  • availability in food grade configurations

These properties make polypropylene felt filter bags suitable for both general industrial and sensitive process applications.

Design and construction

Polypropylene felt filter bags supplied by Filtra International are manufactured with a focus on performance consistency and operational reliability.

Typical design features include:

  • polypropylene felt depth filtration media

  • finished surface to reduce fibre migration

  • robust stitched or thermally bonded construction

  • integrated sealing ring options to prevent bypass

  • compatibility with standard industrial support baskets

The sealing system ensures correct positioning inside the housing and minimises the risk of unfiltered liquid bypass.

Available micron ratings

Polypropylene felt filter bags are available in a wide range of micron ratings, allowing accurate selection based on process requirements.

Typical available ratings include:

  • 1 micron

  • 3 micron

  • 5 micron

  • 10 micron

  • 25 micron

  • 50 micron

  • 75 micron

  • 100 micron

  • 150 micron

  • 200 micron

Standard sizes

Polypropylene felt filter bags are supplied in standard industrial sizes to ensure compatibility with common bag filter housings.

Typical sizes include:

  • Size 1

  • Size 2

  • Size 3

  • Size 4

  • Size 5

Custom sizes can be supplied on request.

Operating limits

Typical operating limits for polypropylene felt filter bags include:

  • operating temperatures suitable for polypropylene based media

  • pressure limits compatible with standard industrial bag housings

  • recommended filter change out based on differential pressure

Exact operating limits depend on process conditions and should be confirmed per application.

Typical applications

Polypropylene felt filter bags are widely used in:

  • chemical processing

  • industrial water treatment

  • surface treatment processes

  • paint and coating systems

  • recycling and recovery processes

  • cosmetics and personal care production

  • food and beverage pre filtration

  • general industrial liquid filtration

Key benefits

  • Reliable depth filtration performance

  • Broad chemical compatibility

  • Silicone free construction

  • Available in food grade versions

  • Wide range of micron ratings and sizes

  • Cost effective and easy to replace

  • Compatible with standard bag filter housings

Configuration and quotation

Polypropylene felt filter bags are supplied based on application requirements. Selection parameters include:

  • micron rating

  • bag size

  • sealing ring type

  • operating conditions

Filtra International provides technical support to ensure correct filter bag selection for optimal filtration performance.

 

 

Technical support and validation

Selecting the correct filtration solution often requires verification under real process conditions. Filtra International supports this process through several practical testing and validation options.

• Filter samples – available for compatibility and performance checks in existing filter housings.
• Full-scale filter housing rental – for temporary installations or process evaluation.
• Laboratory and pilot-scale filtration units – enabling controlled testing before full implementation.
• Application testing by our team – customers may send product samples for filtration trials and performance evaluation.

These options allow process validation before committing to a permanent installation.

Not sure if this configuration is right for your application?

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Typical parameters include:

• Flow rate
• Particle size or filtration rating
• Temperature and pressure
• Chemical composition of the media