What is the difference between primary, intermediate and high efficiency filters? What is the replacement cycle of air filters?

Primary filter,Medium Efficiency Filterrespond in singingHigh Efficiency FilterWhat is the difference between the What is the replacement interval for air filters?

Primary filter, neutral effect,High Efficiency FilterThe main difference lies in the filtration efficiency and the different uses, roles, materials, and speeds of the different filters, the function may be a little different, in the multi-stage filtration system using both middle and high efficiency filters, the primary filter is to alleviate theMedium Efficiency FilterThe filtration pressure of the filter and set up, while the primary filter, intermediate filters and in order to reduce the pressure of high-efficiency filters, improve the service life of high-efficiency filters and set up, because the price of high-efficiency filters is much higher than the primary and intermediate filters.

Here we will look at the primary filter, intermediate filter, high efficiency filter characteristics and replacement cycle:

Primary filters:

The primary filter of the air conditioning system is mainly used for filtering dust particles above 5 μ m. There are three types of primary filters: plate-type, folding-type and bag-type.

Role of primary filter:With large pleated filtering area, it can effectively filter large particles, dust, mosquitoes, hairs, etc. Ensure the fresh air volume while the air enters the room from outside.

Replacement cycle:Three to four months, depending on the air quality of the location where it is used.

Role of primary filter:With large pleated filtering area, it can effectively filter large particles, dust, mosquitoes, hairs, etc. Ensure the fresh air volume while the air enters the room from outside.

Medium Efficiency Filter:

Medium-effect filters belong to the F series of air filters, which are divided into bag filters and non-bag filters. Among them, bag filters are F5, F6, F7, F8, F9, and non-bag filters are FB (plate-type intermediate-effect filter), FS (baffle-type intermediate-effect filter), FV (combined intermediate-effect filter).

common symbol

F5, F6, F7, F8 and F9 are filtering efficiencies (colorimetric method).

F5:40 ~ 50%;

f6:60 ~ 70%;

F7:75 ~ 85%;

F8:85 ~ 95%;

F9:99%.

Uses:Mainly used in the intermediate filtration of central air-conditioning ventilation system, pharmaceutical, hospital, electronics, food and other industrial purification; can also be used as the front-end filtration of high-efficiency filtration to reduce the high-efficiency overload and prolong its service life;

Due to the large windward surface, high air dust volume and low air velocity, it is considered to be the best medium efficiency filtration structure at present.

Features.

1.Capture 1-5um particles of dust and all kinds of suspended matter.

2. Adopting hot-melt process, stable structure, reducing the risk of leakage.

3. High air volume.

4. Low resistance.

5. High dust holding capacity.

6. It can be washed and used repeatedly.

7. Type: Frameless and framed bag type.

8. Filter material: special non-woven fabric or glass fiber.

9. Efficiency: 60% ~ 95% @ 1 ~ 5um (colorimetric method).

10. Maximum temperature and humidity: 80°C, 80%.

High efficiency filters:

It is mainly used to collect particulate dust below 0.5um and all kinds of suspended matters, and as the end filter of various filtration systems. Using ultrafine glass fiber paper as filter material, folding rubber sheet paper, aluminum foil sheet and other materials as partition, sealing with new type polyurethane sealant, and galvanized plate, stainless steel plate, aluminum alloy profile as outer frame.

Role of high efficiency filter:The high efficiency filter is installed in the top layer of the new air purifier. After the outdoor fresh air is filtered through the primary filter, EPIC low-temperature plasma electrostatic module and negative ion module, all the remaining harmful particles are removed by the high-efficiency filter.

Replacement cycle: one to two years, depending on the air quality of the place of use.