What is the role and classification of the primary air filter? What are the points of attention for the installation of primary effect filter?

What is the function and classification of primary air filters?Primary filterWhat are the points of attention for installation?

As the primary filtration of air-conditioning system, it mainly filters dust particles above 5μm. In the atmospheric dust counting method, the counting efficiency (%) is 20≤E＜80, and the plate type, folding type, and bag type have become three typical styles.

It is used in the pre-filtration of air conditioning and ventilation systems to avoid the accumulation of dust and pollution inside the system;

The role of the filter in the purification project air conditioning system inside the pivotal

at the same timePrimary filterUsed for pre-filtration of large air compressors, centralized ventilation and air-conditioning systems in cleanrooms and return air filtration to extend the service life of the back-end high X filters;

In fact, primary filters are also used in the ventilation system of ordinary industrial plants to achieve the general clean air requirements.

Plate-type primary effect filter has a wide range of applications and plays a great role in office areas, shopping malls and buildings, scientific research institutions, and is also used in the pharmaceutical, food and precision electronics industries as a pre-filtration of the centralized ventilation system.

In the cleanroom air intake and exhaust devices, play the effect of air filtration, adsorption of suspended dust particles in the air.

Primary effect filter is divided into primary effect plate filter, primary effect folding filter, primary effect paper frame filter.

Primary effect nylon mesh filter and primary effect bag filter, etc..

They can effectively block dust particles in the air as the pre-filter of air filters, and protect the back-end intermediate-effect as well as high-X filters. Good quality primary-effect filters have a service life of 2-4 replacements under normal environmental conditions.

Avoid the clogging of the filter surface on the air quality, you still need to pay attention to the replacement cycle.

Primary filters are categorized by practice as follows.

Folded primary filters.

Plate-type primary filters.

Washable Primary Filter

Bag-type primary filters.

Primary filter media are polyester synthetic fiber, nylon mesh, activated carbon several kinds;

Primary filter frame materials include aluminum frame, galvanized steel frame and paper frame;

The filtration efficiency level of primary filter is G1, G2, G3, G4.

Plate-type primary effect filter frame materials vary.

Mainly divided into paper frame, aluminum frame, galvanized sheet frame.

Check the box depending on the situation.

Filter material is non-woven or non-woven fabrics which are mainly.

Features include: the use of man-made fiber filter material with significant effect of moisture resistance, with good moisture resistance. The distance between the filters is reasonable, and the V-shape allows the airflow to pass through a wide area.

Filter material can be cleaned in the usual maintenance, can be recycled many times, the pursuit of environmental protection and energy saving at the same time also saves the cost of the enterprise.

Because of the large area of the filter media and the large dust holding capacity, the service life is naturally greatly improved.

The outer frame is made of aluminum alloy and the inner skeleton is steel welded structure, which is beautiful in appearance, stable in structure and practical in design.

Extended Reading:

Although the filtration precision is not very high, the application is very, it is usually used as the primary filtration equipment of air conditioning system or purification system, which can not only improve the filtration efficiency of the system, but also effectively reduce the workload of the back-end filtration equipment and prolong their service life.

The outer frame of the plate type primary effect filter is usually made of aluminum alloy, and the diamond-shaped guard net is installed on the side of the air outlet, which can make it have the stability of replacement, and can still maintain good filtration efficiency in time in the harsh working environment. The filter material of plate-type primary effect filter is ** polyester synthetic fiber, which can be used repeatedly after cleaning, with long service life and economic durability, and the filter adopts a gradual dense fiber structure to ensure that it has a large rate of dust collection and dust capacity.

Points to note for the installation of plate type primary effect filter

1. In the process of transportation and storage, the plate-type primary effect filter should be placed in strict installation of the manufacturer's instructions, and try to avoid violent vibration and collision, so as not to make the filter damaged.

2. Before installing the plate-type primary effect filter, the pipeline of the clean system or air-conditioning system should be cleaned, if there is dust accumulation inside the purification system, it will have an impact on the filtration efficiency of the equipment.

3. Before installing the plate-type primary effect filter, the appearance of the equipment should be inspected, including whether the filter is intact, whether there are burrs and rust spots in the sealant and frame, etc. And the filter efficiency should be tested in an appropriate way. And use the appropriate way to test the filtration efficiency of the plate-type primary effect filter, installation should be based on the size of the air resistance of the back-end filtration equipment reasonable deployment of the plate-type primary effect filter. For unidirectional flow, the difference between each filter on the same air outlet or air supply surface, each rated resistance and the average resistance of each unit should be less than 5%.

4. When installing the plate-type primary effect filter, the frame should be guaranteed to be flat, and the deviation of the flatness of the frame of each plate-type primary effect filter should be no more than 1mm, and the arrow on the outer frame of the filter should be kept in the same direction as the airflow.