Why use a junior high-efficiency air filter three-stage filtration system in a clean room?
A three-stage filtration system is more suitable for demanding 100-class and 1000-class clean rooms compared to primary or preliminary filtration. This system ensures better air quality by effectively removing particles of various sizes, especially in environments where dust concentration is high.
For example:
- A: Fresh air dust (≥0.5μm, industrial city): 3×10âµ/l
- B: Average dust particle distribution in a Class 100 clean room (≥0.5μm): 3.5/l
- C: Average dust particle distribution in a 1000-class clean room (≥0.5μm): 35/l
- D: Dust particle distribution in the return air of a Class 100 clean room (≥0.5μm): 5/l
- E: Dust particle distribution in the return air of a 1000-class clean room (≥0.5μm): 43.8/l
- F: Dust particle distribution after filtration (≥0.5μm, industrial city): 2.84×10âµ/l
- G = F/D = 5.68×10â´
- H = F/E = 6.48×10³
- I: Filtration efficiency required for fresh air in a Class 100 clean room to match return air cleanliness: 99.998%
- J: Filtration efficiency required for first-class fresh air to match return air cleanliness: 99.995%
Using a junior high-efficiency three-stage filtration system can reduce the replacement cost of high-efficiency filters by over 75%, with even greater benefits at higher clean room standards.
By replacing traditional primary and secondary filters with sub-efficient or high-efficiency filters, fresh air can be processed to a dust concentration similar to that of the return air. This reduces the load on high-efficiency filters and extends their lifespan by more than four times, significantly lowering maintenance costs. The economic benefits are substantial, as production costs can be reduced to one-quarter of the original.
Failure to implement proper filtration can lead to frequent cleaning or replacement of medium and high-efficiency filters, shortening their service life and increasing operational costs. It also reduces the reliability of the air conditioning system, especially in clean rooms with high-efficiency or ultra-high-efficiency filters.
For more detailed information, refer to the attached document titled "Fresh Air Treatment of Purification Air Conditioning System" from Chongqing Chemical Research and Design Institute.
**Notes on Filter Design:**
- Non-separator high-efficiency filters are commonly used in strict unidirectional flow Class 100 and non-unidirectional flow Class 1000 clean rooms.
- Diaphragm filters are suitable for low-level non-unidirectional projects.
- Even with the same filter paper efficiency, non-separator filters have better sealability and higher actual filtration efficiency. However, they tend to be more expensive.
- Aluminum separator filters are ideal for high-temperature or high-humidity environments, while paper separators are used in general clean environments.
- The choice of sealing method, size, and specifications should consider future maintenance and replacement needs.
Currently, most Class 100 clean rooms use non-separator high-efficiency filters, and FFUs (Fan Filter Units) often come with non-separator high-efficiency filters.
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**SW-CJ-1Bu Single-Person Single-Sided Purification Workbench**
The horizontal unidirectional airflow purification workbench is a versatile local purification device widely used in electronics, national defense, precision instruments, pharmaceuticals, and other industries.
**Features:**
1. Horizontal design with a semi-closed glass damper, easy to operate.
2. Remote control switch with two-speed fan system ensures optimal wind speed in the work area.
3. Uses an ultra-thin aluminum frame without a partition high-efficiency air filter, minimizing the static pressure box size and maximizing the clean working area.
**Technical Parameters:**
- Model: SW-CJ-1Bu
- Cleanliness Level: Class 100 @ ≥0.5μm (US Federal 209E)
- Particle Count: <0.5 pcs/dish (90mm culture plate)
- Noise: ≤62dB(A)
- Average Wind Speed: 0.25–0.45 m/s
- Vibration Half-Peak: ≤0.5μm (X·Y·Z)
- Illuminance: ≥300LX
- Power Supply: AC, single-phase 220V/50Hz
- Max Power Consumption: 320W
- Weight: 160kg
- Working Size: 900×500×600mm
- Dimensions: 930×745×1620mm
- High-Efficiency Filter: 795×600×38×1
- Fluorescent / UV Lamp: 20W×1 / 20W×1
This workbench provides a reliable and efficient solution for maintaining high cleanliness standards in critical applications.
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