Do you know the common sense of primary filter?

The air filter is the key equipment in the purification air conditioning system. It provides clean air for the clean room through the step-by-step filtration of the filter. Its performance directly affects the air purification effect of the purifying air conditioning system and the cleanliness level of the room. Therefore, the purification air conditioning system must select the appropriate air filter and ensure its reliable operation. Air filters are classified into primary, medium, sub-efficient and high-efficiency filters according to their filtration efficiency. Today, let’s introduce the common sense of primary filter.

1.) Purpose

The primary filter is also known as the coarse filter. The primary filter is used as the front-end filter in the air filtration to effectively protect the filtration efficiency and service life of the lower filter. It is mainly used to filter dust particles above 5μm. Generally used in: primary filtration of air-conditioning systems, pre-filtration of multi-stage filtration systems. Its structure has three types: plate type, folding type and bag type.

2.) Structure

The primary filter structure is generally divided into a dragon skeleton and a frame skeleton. The characteristics of the dragon skeleton are strong, and the filter material is evenly distributed, but the production is time-consuming and labor-intensive. The characteristics of the frame are that it is convenient to replace the filter material, saves time in production, and the strength is slightly worse than that of the dragon frame. The outer frame materials include paper frame, aluminum frame, and galvanized iron frame. The filter material includes non-woven fabric, nylon mesh, activated carbon filter material, metal mesh, etc. The protective net includes double-sided plastic-sprayed wire mesh and double-sided galvanized wire mesh.

3.) Features

The filter material can be replaced by itself, and the initial effect of the paper frame is one-time.

4.) Replacement Cycle

If the filter uses a washable filter material, it is generally replaced once every 1-2 months, and the replaced filter material can be rinsed with water or a solution containing neutral detergent, dried, and then replaced;** More than two cleanings are allowed, that is, a new filter must be replaced to ensure the filtration efficiency; when the resistance of the filter reaches more than 250Pa, the filter must be replaced; if the dust concentration in the use environment is large, the service life cycle will also continue. will decrease.

5.) Instructions for Installation and Use

The air filter must be regularly check whether the filter mesh is damaged, whether the air inlet surface is blocked by debris, and whether the surface of the filter material is damaged; if the surface is blocked by debris, it should be removed; if the surface of the filter material is seriously damaged, then you must replace the new filter material or replace the new filter and reinstall it.

When installing the filter, it is necessary to ensure good sealing with the pressing edge of the frame to prevent air leakage; do not use heavy objects to hit the surface of the filter, and do not use force to pull the surface of the filter material.