What factors should be considered when choosing an aluminum separator high-efficiency filter?

When choosing an aluminum partition high-efficiency filter, it is necessary to comprehensively consider multiple factors such as its performance, compatibility, usage environment, and economy to ensure that the filtration effect meets the requirements and the operation is stable. The following are the key considerations:
I. Core Performance Parameters
Filtration efficiency
The core indicators of high-efficiency filters should be selected based on actual needs, and the corresponding efficiency grade should be chosen accordingly. Common standards include:
HEPA standard: Filtration efficiency for 0.3μm particulate matter ≥99.97%;
ULPA standard: Filtration efficiency for 0.12μm particulate matter ≥99.999%.
The efficiency requirements vary greatly depending on the application scenarios (for example, a chip workshop needs ULPA grade, while a regular cleanroom can choose HEPA grade).
Rated air volume and resistance
The rated air volume should match the designed air volume of the system: if the air volume is too small, it will lead to insufficient filtration capacity; if it is too large, it may exceed the load of the filter material, increase resistance, and shorten the service life.
Initial resistance: The resistance value at the rated air volume (typically 150-250Pa), which needs to be matched with the air pressure of the air conditioning system to avoid increased energy consumption due to excessive resistance.
Final resistance: The resistance when the filter reaches the replacement standard (generally 2 to 3 times the initial resistance), and it should be convenient for system monitoring (such as installing a differential pressure gauge).
Dust holding capacity
It refers to the total amount of dust that the filter can hold before reaching the final resistance, which directly affects the service life. The greater the dust holding capacity, the longer the replacement cycle and the lower the maintenance cost.
The structural design of the aluminum partition (such as the spacing of the pleats and the area of the filter material) will affect the dust holding capacity. The selection should be made in combination with the dust concentration of the usage environment (for example, a higher dust holding capacity is required in an industrial workshop).
Ii. Compatibility of materials and structures
Filter material material
The mainstream is ultra-fine glass fiber filter paper, which features high filtration efficiency and stability. In some scenarios, composite filter materials (such as anti-static and waterproof treatments) can be selected to meet special requirements (such as anti-static and flame-retardant in electronic workshops, and anti-mold in humid environments).
Aluminum partition and outer frame material
Aluminum partition: It is necessary to ensure that the corrugated structure is uniform, and the pleat spacing can be stably maintained to guarantee smooth airflow (avoiding excessive local resistance).
Outer frame: Select based on environmental corrosiveness
Aluminum frames are available for ordinary environments (lightweight and low cost).
Galvanized steel frames can be selected for damp or slightly corrosive environments (such as food workshops and laboratories).
In highly corrosive environments (such as chemical clean areas), stainless steel frames (304 or 316 material) should be selected.
Sealing performance
The sealant needs to be compatible with the usage environment
Polyurethane adhesive is available for normal temperature scenarios.
For high-temperature scenarios (such as drying workshops), silicone rubber (resistant to 250℃) or polytetrafluoroethylene rubber (resistant to 350-400℃) should be selected.
It is necessary to ensure that the adhesive layer is uniform and free of air bubbles to prevent air leakage (leakage will cause unfiltered air to directly enter the clean area, reducing the overall effect).
III. Environmental Conditions for Use
Temperature and humidity
Temperature: The temperature resistance of the conventional model is ≤80℃. In high-temperature scenarios, the temperature resistance grade of the filter (such as 250℃, 350℃) must be clearly defined to prevent the filter material or sealant from failing due to high temperatures.
Humidity: In high-humidity environments (such as pharmaceutical wet granulation workshops and battery workshops), high-humidity resistant filter materials and sealants should be selected to prevent the filter materials from getting damp, deforming, or moldy.
Characteristics of Environmental Pollutants
If the air contains oil mists, chemical vapors, etc., the chemical resistance of the filter material should be given additional consideration (such as choosing PTFE-coated filter material), or a pre-treatment filter (such as an activated carbon filter) should be installed at the front end to prevent the filter material from being corroded.
In scenarios with high dust concentration (such as clean areas in heavy industry), high-efficiency primary and medium-efficiency filters should be used for pre-treatment to reduce the load on the aluminum separator high-efficiency filters.
Four. Installation and Maintenance compatibility
Dimensions and installation methods
The size of the filter needs to match the system air outlet or static pressure box (common specifications include 610×610×150mm, 610×305×292mm, etc.), and special sizes can be customized.
Installation method: Select according to the system design (such as flange connection, liquid tank sealing). Liquid tank sealing is suitable for high-cleanliness scenarios (such as Class 100 operating rooms) to ensure no leakage.
Replacement and maintenance costs
Consider the weight of the filter and the convenience of replacement (such as whether large-sized filters require auxiliary tools);
Based on the dust holding capacity and the environmental dust concentration, estimate the replacement cycle to avoid increased downtime costs due to frequent replacements.
V. Industry Standards and Certifications
It should comply with industry norms of the application scenario, such as:
The pharmaceutical industry needs to meet GMP certification requirements.
The electronics industry must comply with the ISO 14644 cleanroom standard.
The medical field requires FDA or CE certification (in some export scenarios).
Give priority to choosing products that have passed third-party testing (such as SGS, National Air Conditioning Equipment Quality Supervision and Inspection Center) to ensure the authenticity and reliability of performance parameters.
Summary
When making a selection, it is necessary to take "scene requirements as the core": first, clarify the basic parameters such as cleanliness level, air volume, temperature and humidity, then match the material, sealing performance and installation requirements, while also taking into account the economic aspect of long-term use (lifespan, maintenance cost). For instance, in the chip workshop, ULPA efficiency, temperature resistance, and leakage prevention should be given priority. For food workshops, emphasis should be placed on moisture resistance, anti-corrosion of galvanized outer frames, and compliance with hygiene regulations.