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 secondary filtration. Here's why:
A. Fresh air dust (≥0.5μm, industrial city): 3×10âµ/l
B. Average dust particle size distribution in the working area of a Class 100 clean room (≥0.5μm): 3.5/l
C. Average dust particle size distribution in the working area of a 1000-class clean room (≥0.5μm): 35/l
D. Average dust particle size distribution of the return air in a 100-class clean room (≥0.5μm): 5/l
E. Average dust particle size distribution of the return air in a 1000-class clean room (≥0.5μm): 43.8/l
F. Dust particle size 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 to reach the same cleanliness as return air in a 100-class room: 99.998%
J. Filtration efficiency required for first-class fresh air to match return air cleanliness: 99.995%
Using a three-stage junior high-efficiency filtration system can reduce the cost of replacing high-efficiency filters by over 75%, especially in higher-grade clean rooms. This system helps reduce the load on high-efficiency filters, extending their lifespan by more than four times. As a result, production costs can be cut to a quarter of the original, offering significant economic benefits.
Without proper filtration, the difference in dust concentration during fresh air mixing can shorten the replacement cycle of medium-efficiency filters, leading to increased maintenance costs and reduced reliability of the entire air conditioning system. High-efficiency and ultra-efficient filters are particularly affected, and shortening their replacement cycles increases both material and labor costs.
For reference, you can consult the document titled “Fresh Air Treatment of Purification Air Conditioning System†from Chongqing Chemical Research and Design Institute.
**Notes on Three-Stage Filtration Systems:**
1. Non-separator high-efficiency filters are ideal for strict unidirectional flow clean rooms at 100 and 1000 classes.
2. Diaphragm filters are suitable for low-level non-unidirectional flow projects.
3. Even with similar filter paper efficiency, non-separator filters offer better sealing and higher actual filtration efficiency. However, they come at a higher cost and require more attention to maintenance.
4. Current 100-class clean rooms often use non-separator high-efficiency filters, and FFUs are also equipped with such filters.
The SW-CJ-1Bu single-person single-sided purification workbench is a versatile local purification device widely used in electronics, defense, precision instruments, pharmaceuticals, and other industries.
**Features:**
- Horizontal design with a quasi-closed glass damper for easy operation.
- Remote control switch for two-speed fan system to maintain ideal wind speed.
- Uses an ultra-thin aluminum frame without partitions, reducing the static pressure box size and increasing the clean area.
**Technical Specifications:**
- Model: SW-CJ-1Bu
- Cleanliness: Level 100 @ ≥0.5μm (US Federal 209E)
- Number of colonies: <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 system ensures a controlled and safe environment, making it an essential tool in clean room applications.
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