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Latest company case about Guangzhou Cleanroom Construction Co., Ltd. Certifications

In-Depth Analysis and Construction Guidelines for the Return Air Column System in Class 100 Cleanrooms

2025-07-22

Latest company case about In-Depth Analysis and Construction Guidelines for the Return Air Column System in Class 100 Cleanrooms
I. System Composition and Material Analysis
1.1 Main Frame Structure
The return air column system uses a combination of high-strength aluminum alloy profiles:
Aluminum Base Channel: As the load-bearing foundation, 6063-T6 anodized profiles are used, with a channel depth of 50mm, wall thickness of 2mm, and an anodized coating thickness ≥15μm.
Angle Aluminum Reinforcement: Special L30×30×2mm cleanroom angle aluminum with conductive oxidation treatment ensures surface resistance in the range of 10⁴-10⁶Ω.
1.2 Airflow Channel Design
The return air system adopts a symmetrical bilateral design:
Return air duct clear width: 400mm, internally lined with perforated aluminum panels (aperture Φ3mm, perforation rate 28%).
A 50mm thick fiberglass sound-absorbing layer is installed at the back, with an NRC (Noise Reduction Coefficient) ≥0.85.
The airflow guide system uses 45° inclined baffles spaced 80mm apart to ensure laminar flow transition.
1.3 Sealing Transition Components
The system employs a triple-sealing guarantee:
Aluminum Alloy Inside Corner Column: R30mm arc transition design with pre-installed EPDM sealing strips.
Aluminum Alloy Outside Corner Column: 88° convex angle design with integrated anti-dust guide slopes.
Sealant System: Two-component silicone sealant with post-curing elongation ≥300%.
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