Pre-Efficiency Filter Media is the first line of defense for air filtration systems. It is mainly used to intercept large particle pollutants (such as dust, hair, fiber, flying catkins, etc.) in the air, and provide pre-protection for the back-end high-efficiency filters (such as HEPA, ULPA), extending their service life and reducing overall maintenance costs. The core of its design is to balance filtration efficiency and air flow, and is suitable for ventilation systems or industrial processes with staged requirements for cleanliness.
Core Features and Advantages
Efficient Interception and Low Cost
Using materials such as polyester fiber, synthetic non-woven fabric or metal mesh, through fluffy porous structure or gradient density design, it can effectively capture larger particles above 5μm. The filtration efficiency usually meets ISO Coarse (EN779 standard) or MERV 5-8 (ASHRAE 52.2 standard). At the same time, the material cost is low, which is suitable for primary filtration scenarios with frequent replacement.
High dust holding capacity and low resistance
The open fiber structure gives it high dust holding capacity, which can absorb a large amount of pollutants for a long time without significantly increasing the system pressure difference, reducing the fan energy consumption, and is suitable for environments with high dust concentration (such as construction sites and textile workshops).
Flexible adaptation and easy maintenance
It can be processed into plate, bag or roll form, suitable for the air inlet of various air-conditioning units, fresh air systems or industrial equipment. The surface can be treated with oil and water to enhance stability in humid or oily environments.
Sustainability
Some primary media use washable or recyclable materials (such as metal aluminum mesh), which supports reuse and reduces waste generation, in line with the trend of green industrial development.
Typical application scenarios
Commercial and public buildings: pre-filtration of central air-conditioning systems to protect surface coolers and high-efficiency filters.
Industrial manufacturing: pre-filtration in spraying workshops and woodworking workshops to reduce the risk of dust contamination of precision equipment.
Medical and laboratory: cooperate with high-efficiency filters to build a multi-stage clean air system.
Transportation facilities: pre-filtration of fresh air in subway stations and airports to improve indoor air quality.
Selection and maintenance recommendations
The thickness and density of the primary filter medium should be selected according to the front-end pollutant load (such as particle type and concentration) and the system air volume. It is recommended to regularly determine the blockage through differential pressure monitoring or visual inspection. The cleaning or replacement cycle is usually 1-3 months, which needs to be adjusted according to the actual environment.
As the basic link of the multi-stage filtration system, the primary filter medium reduces the burden of the subsequent filtration stage in an economical and reliable way, and is a key component to improve the energy efficiency and stability of the system.
