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The Filtration Sector

The filtration sector is crucial in many industries, from textile production to the medical sector, including automotive and others. The quality of air and the ability to maintain controlled environments are essential to ensure the safety and efficiency of production processes. One of the key aspects of filtration is understanding the passage of air through filters and filter bags to ensure that the air is clean and free from contaminants.


Understanding how air passes through filters and filter bags is essential to ensure that the filtration system operates correctly. This includes measuring permeability and specific resistance to air passage:

  • Air Permeability: Indicates how easily air can pass through a filter material.
    High permeability means air passes easily, while low permeability indicates the material is more restrictive.
  • Specific Resistance to Air Passage: Measures the resistance that the material offers to the passage of air.
    It is a crucial parameter for evaluating the filter's effectiveness and its durability over time.

air-perm-brancaSeveral instruments are available on the market to analyze the air permeability of filter materials.
Among these, BRANCA IDEALAIR offers two models for measuring air permeability:

  • AIR PERMEABILITY 37S: This model is designed for standard applications and provides precise analysis of air permeability of samples. It is suitable for routine tests in quality control laboratories.
  • AIR PERMEABILITY 37SC: This model is more advanced and includes additional features for more complex analyses.
    It is ideal for research and development laboratories as well as production environments requiring detailed and specific data.

Results of air permeability measurements can be expressed in various units of measurement, including:

  • m/m/min (cubic meters per square meter per minute): Indicates the volume of air passing through a square meter of material in a minute.
  • l/dm/min (liters per square decimeter per minute): A similar measure but on a smaller scale.
  • CFM (cubic feet per minute): Cubic feet per minute, commonly used in English-speaking countries.

filtration-controlsPermeability control is crucial to ensure material homogeneity from the processing stages in production areas.
Here are some of the advantages:

  • Quality Improvement: Ensuring all filter materials have uniform permeability helps maintain consistent product quality.
  • Optimization of Production Processes: Good permeability ensures production processes are efficient and free from interruptions due to clogged or ineffective filters.
  • Increased Filter Lifespan: Materials with the right permeability offer greater durability, reducing the need for frequent replacements.
  • Reduction of Operating Costs: Controlling and ensuring filter permeability can lead to significant savings in operating costs, thanks to increased efficiency and reduced machine downtime.

The filtration sector requires constant attention to the quality and efficiency of the materials used. Understanding and controlling the air permeability of filter bags is essential to maintain high production standards. Instruments like those offered by Branca Idealair are crucial for conducting precise and reliable analyses, thus contributing to the continuous improvement of industrial processes.