The selection of filter media and frame materials for medium-efficiency bag filters has a critical impact on their performance and service life. Below is a detailed introduction to the filter media and frame materials used in medium-efficiency bag filters:
Filter Media
The filter media in medium-efficiency bag filters are typically made of synthetic fibers or natural fibers, which offer good breathability and specific filtration precision. Common filter materials include:
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Non-Woven Fabric
- Non-woven fabric is a type of non-woven material formed by bonding fibers directly through physical or chemical methods.
- Advantages: Soft texture, lightweight, excellent breathability, and high filtration efficiency.
- Application: Widely used in medium-efficiency bag filters to capture airborne dust particles, with a filtration efficiency typically ranging from 60% to 95%.
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Synthetic Fibers
- Synthetic fibers, such as polyester and polypropylene fibers, exhibit excellent physical and chemical properties, including wear resistance, corrosion resistance, and high-temperature tolerance.
- Advantages: High filtration precision and dust-holding capacity, suitable for filtering smaller airborne particles.
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Glass Fiber
- Glass fiber filter media are characterized by high strength, corrosion resistance, and heat resistance, making them ideal for filtering high-temperature, high-humidity, or corrosive gases.
- Application: Due to their higher cost, they are more commonly used in medium-to-high-efficiency filters but may also be adopted in specialized medium-efficiency filter applications.
Color Coding for Filter Grades
Filter media colors are often used to indicate their efficiency and grade. For example:
- F5-grade: White
- F6-grade: Green
- F7-grade: Pink
- F8-grade: Light yellow
- F9-grade: Dark yellow
These color codes help users quickly identify the performance level and application suitability of the filter media.
