The core filter of the medium efficiency bag filter is a new type of composite non-woven fabric (including anti-static fibers). Every two filter bags are fixed with metal strips to improve the strength of the filter bags, and the edges of the filter bags are bonded by hot melt. It has product characteristics such as high dust collection rate, low resistance, good ventilation, large dust solubility, good sealing and durability, no air leakage, and no breakage. The filtration efficiency is between 60% and 95% (@ 1~5um colorimetric method), the application temperature is about 80C, and the relative humidity is about 80%.

Working principle of medium efficiency bag filter

The working method is different from the function of a "sieve". Dust particles in the air will undergo inertial or irregular motion under the action of airflow. There is also a force called "van der Waals force" between objects (adsorption force between molecules, molecular clusters), which causes dust particles entering the medium efficiency air filter bag to adhere to the fiber surface of the medium efficiency air filter bag, exhibiting the air purification effect of a bag type medium efficiency air filter.

In addition, small dust particles in the air only adsorb to each other when they collide, forming larger particles that then sink, so the particle density of fine dust in the air is relatively stable. The slow fading of indoor and walls is due to this reason. Due to motion friction, fiber filters and dust particles may carry charges, resulting in electrostatic effects. The resistance of the medium efficiency bag filter material remains unchanged after being charged with static electricity, and the filter effect can be greatly improved. Static electricity can cause fine dust to change its trajectory. When encountering the obstacle of the medium efficiency filter, fine dust will adhere more tightly to the filter medium.

Application of Medium Efficiency Bag Filter

Medium efficiency bag filters are mainly suitable for industries such as electronics, semiconductors, precision manufacturing, optoelectronics, healthcare, pharmaceuticals, and food. They are used in pharmaceutical, civilian, and dust-free workshops that require high cleanliness. Through comprehensive filtration with high efficiency, they reduce the load of high-efficiency filtration.

Factors affecting medium efficiency bag filters:

There are two types of resistance that affect the filter. Firstly, there is the wind speed. The higher the wind speed, the greater the filtering resistance. The second is the degree of air pollution. The greater the pollution, the greater the resistance. If the wind speed remains constant, the magnitude of the resistance can basically reflect the amount of dust in the filter.

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