Bag filter: You need to know about glass fiber bag filter

What is glass fiber bag filter? Glass fiber bag filter is indispensable for ventilation and air conditioning system and is the backbone of air purification. What can glass fiber bag filter do? Below has the basic overview, filtering principle and other information of glass fiber bag filter.

Basic overview

Glass fiber bag filter is mainly used in intermediate air conditioning ventilation system. The secondary filtration is mainly used to filter air floating objects above 1-5μm. It is characterized by large ventilation volume, large dust holding capacity and small resistance.

The general frame material is aluminum alloy profile or galvanized material. It has good support force and can effectively prevent the bag filter from shrinking or deforming in extreme working atmosphere.

The efficiency range of bag filter is generally G4-F9. The filter material selection generally uses glass fiber or chemical fiber (except spraying industry). It has the characteristics of large dust holding capacity, large ventilation volume, good filtering effect, strong and durable. It is generally used for mid-range filtration of refrigeration units.

Glass fiber bags have many tiny fibers, and the fiber surface area is very large, while chemical fiber materials have large gaps, and the friction resistance is smaller than that of glass fiber, while the pressure of glass fiber is greater.

Filtering principle

There is a lot of dust in the air, which moves with the inertia of the cyclone. The dust entering the bag filter will be stuck when it hits the object. The collision of smaller particles will adhere to larger particles and basically settle.

The glass fiber bag filter of the purification air conditioner uses glass fiber as the filter system. The fibers and dust are likely to carry positive charges, resulting in electrostatic effects, and the filtering effect can be greatly improved.

Composition structure

There are two main components of the glass fiber bag filter, one is the frame and the other is the bag.

Generally, there are different materials such as aluminum frame, hot-dip galvanized frame and stainless steel. The filter material is generally high-quality fluffy synthetic fiber, and the filter material is more than one layer.

Glass fiber bag filters are used to purify larger particle residues in the air, and then the finer second layer of filter material is mainly used to improve the filter reliability and filter smaller particles. This design structure can reduce the filtration resistance, increase the dust holding capacity, and extend the service life.

Applications

Glass fiber bag filters can block dust particles larger than 1μm, and have the characteristics of large filtration range, large dust holding capacity, and low friction resistance. It is often used in humid, high cyclone and dust-carrying environments, and is used for purification in central air conditioning, pharmaceutical industry, hospital clinics, electronics, food and other industries. Glass fiber bag filters can also be used as front filters for high-efficiency air filters, thereby reducing the load of high-efficiency air filters and extending their service life.