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

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.

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.

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%.

Surveying and Layout:

Uses 0.5" grade total station for 3D coordinate positioning.

Implements a "three-level verification" system, with final positioning error ≤0.5mm/m.

Seismic Leveling System:

Base isolation pads use natural rubber products (hardness 60±5 Shore A).

Leveling bolts are equipped with anti-loosening washers to ensure long-term stability.

Multi-Layer Sealing System:

First layer: EPDM sealing strips with 30±2% pre-compression.

Second layer: Polyurethane foam filler with 250% expansion rate.

Third layer: Final silicone sealant application.

Special Node Treatment:

Inside and outside corner joints use dedicated transition connectors.

Wall penetration nodes are equipped with stainless steel sleeves (δ=1.2mm).

Cleanliness Control:

Core work area particle count ≤3520pc/m³.

Tools and materials must undergo alcohol wiping and ionized air dust removal.

Dimensional Control:

Verticality deviation ≤1mm/2m.

Joint misalignment ≤0.2mm.

Routine Maintenance:

• Weekly inspection of sealing strip conditions.
• Monthly cleaning of return air filters.

Periodic Testing:

• Quarterly air tightness testing.
• Annual structural vibration testing.

This return air column system design fully considers the special requirements of cleanrooms. Through precise component assembly and strict construction controls, the system ensures long-term stable operation. It is recommended to create process mock-ups before construction and strictly adhere to clean construction standards.