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Classification of Air Filters in China General Filter ClassificationIn 1992 and 1993, China issued the national standards for air filters: “High-Efficiency Air Filters” (GB 13554-1992) and “Air Filters” (GB/T 14295-1993). The filters are categorized into five types: coarse filters, medium-efficiency filters, high-medium-efficiency filters, sub-high-efficiency filters, and high-efficiency filters. Among these,
1. Two Main Categories of Particle Separation In cleanroom applications, airborne particle concentrations are extremely low—far lower than in typical industrial dust‑collection systems—and the particles themselves tend to be very fine. To remove them reliably, we primarily rely on barrier‑type filters, which physically block contaminants and guarantee a secure final
Cleanroom technology employs comprehensive strategies to control contamination in controlled microenvironments and achieve target air cleanliness levels. Key technical measures include: ① Using compliant materials for cleanroom construction ② Selecting equipment meeting cleanroom standards ③ Implementing containment, isolation, or dust removal to control pollutant dispersion ④ Applying pressure differential controls
1. The Historical Development of Air Cleanliness Technology Traditional air conditioning systems could only regulate air temperature, humidity, and airflow speed (collectively termed “three-degree control”). With technological advancements and rising living standards, demands for production and living environments have increased significantly, driving the evolution of air conditioning technology. Modern systems
Nonwoven Fabric Filters are filtration devices that use nonwoven fabric as the filtering medium, widely applied in air purification, liquid filtration, and other fields. The main components of a nonwoven fabric filter include a nonwoven filter bag and a supporting frame. Nonwoven fabric (made from synthetic fibers like polypropylene [PP]
The air filter of an air compressor is one of the core components ensuring the normal operation of the equipment. Its primary function is to filter dust, impurities, oil mist, and water vapor from the incoming air into the compressor, preventing damage to internal precision parts. The frequency of replacing
Installation and Usage Instructions for Central Air Conditioning System Air Filters Panel Type Filters, Bag Type Filters 1.1 Air handling units should be equipped with corresponding installation tracks or frames to facilitate filter installation. 1.2 During installation: Filter frame arrows should align with airflow direction V-type filters require vertical orientation
Unidirectional Flow Small/Medium Fresh Air Purification Units (Duct Type) Model Dimensions (L×W×H) (mm) Filter Configuration PM2.5 Purification Efficiency (%) Airflow (High/Med/Low Three Gears) (m³/h) Static Pressure (Pa) Noise (dB) Connection Size (mm) Power Supply Power (W) Weight (kg) QL-D-250 650×380×230 Coarse filter/G4 + Activated carbon- filter/High-efficiency filte/ISO 35H 99.9 250/210/165
Model Dimensions (L×W×H) (mm) Filter Configuration PM2.5 Purification Efficiency (%) Airflow (High/Med/Low Three Gears) (m³/h) Static Pressure (Pa) Noise (dB) Connection Size (mm) Power Supply Power (W) Weight (kg) QL-S-500 735×735×250 Coarse filter/G4 + Activated carbon filter + High-efficiency filter/ISO 35H 99.9 800/680/520 120 48 Φ194 Single-phase/220V/50Hz 190 35 QL-S-800
1. Common Ventilation Methods for Residential Fresh Air Systems 1.1 Unidirectional Flow Fresh Air System Working Principle: Only an supply fan is installed to deliver outdoor air into indoor spaces. This creates positive pressure, forcing stale air out through gaps in doors/windows via indoor-outdoor pressure differences. 1.2 Bidirectional Flow Fresh Air
