In cleanroom environments—such as semiconductor fabrication, pharmaceutical labs, and biotech facilities—the ducting system is the primary line of defense against microscopic contaminants. Unlike standard commercial HVAC, cleanroom ducting must be "chemically inert," non-shedding, and airtight to a surgical degree.
At EKG, we engineer these systems to meet ISO 14644-1 standards, ensuring your environment maintains the required particle count (from Class 1 to Class 100,000).
Standard galvanized iron (G.I.) can shed zinc flakes or oxidize over time, which is catastrophic for a cleanroom. We utilize high-purity materials:
Stainless Steel 316L: The industry standard for pharmaceutical and chemical environments. It features a mirror-smooth internal surface that prevents particle accumulation and resists aggressive cleaning agents.
Aluminum Ducting: Used in weight-sensitive ceiling grids (FFU zones). Aluminum is naturally corrosion-resistant and does not outgas or shed metallic dust.
Fluoropolymer Coated (ETFE/ECTFE): For "Exhaust" cleanroom ducts carrying corrosive chemical vapors. These specialized coatings ensure the duct wall does not corrode or react with the process gases.
To prevent "fiber migration" into the clean air stream, we utilize double-wall (sandwich) panels:
Internal Liner: A solid or perforated stainless steel inner skin.
Insulation Core: High-density, closed-cell foam or encapsulated mineral wool.
External Skin: Protective G.I. or aluminum casing.
The Benefit: This design eliminates the risk of raw insulation fibers entering the duct. It also provides superior thermal resistance, preventing condensation in KL's high-humidity surroundings.
In a cleanroom, even a microscopic leak can introduce unfiltered air from the ceiling plenum into the sterile zone.
Full-Weld Construction: For Class 100 and above, we often utilize TIG (Tungsten Inert Gas) continuous welding for all longitudinal and transverse joints, creating a "zero-leak" monolithic pipe.
Liquid Gasket Systems: We use specialized pharmaceutical-grade, non-outgassing silicone or gel seals at all terminal filter connections.
HEPA/ULPA Integration: Our ducts are custom-fabricated to house HEPA (99.97%) or ULPA (99.999%) filter boxes directly at the point of discharge, ensuring the final air "scrubbing" happens at the ceiling interface.
Turbulence is the "enemy" of a cleanroom. Swirling air can trap particles and keep them suspended in the room.
Static Regain Design: We use precise duct tapering to maintain constant static pressure across all filter banks. This ensures that every Fan Filter Unit (FFU) in the ceiling delivers the exact same air velocity.
Laminar Flow Vanes: Internal guide vanes are polished to a high finish to ensure air exits the duct in a perfectly vertical, non-turbulent "piston" of air.
Clean-Room Fabrication Protocol: We don't fabricate cleanroom ducts in a standard workshop. Our components are degreased, wiped with IPA (Isopropanol), and "Cap-and-Sealed" in a controlled environment before transport to the site.
BIM-Level Precision: Cleanroom plenums are incredibly crowded with gas lines, DI water, and power. We use 3D BIM coordination to ensure our high-purity ducting has a "Clash-Free" path that maintains the necessary service access.
Validation & Testing: We assist with the final Room Integrity Test and Particle Count Certification, providing full documentation for your ISO compliance logs.
The Cube Law Efficiency: By utilizing ultra-smooth internal surfaces and low-leakage joints, we minimize the load on your high-static HEPA fans. A 20% reduction in fan speed, made possible by our low-friction engineering, results in a nearly 50% reduction in energy costs.
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