Views: 0 Author: Site Editor Publish Time: 2026-07-06 Origin: Site
Dry cooling coil = sensible heat only heat exchanger, no dehumidification, zero condensate generation.
Chilled water supply temperature is controlled 1~2℃ higher than cleanroom air dew point. Coil surface temperature never drops below dew point, so no water forms on tubes/fins.
Latent load & humidity control are fully handled by fresh air MAU (Make-up Air Unit). This SS dry coil only offsets sensible heat from equipment, lighting, personnel inside the ISO 5~ISO 8 clean space.
Widely used in MAU recirculation duct, ceiling suspended fan coil, FFU auxiliary cooling modules for enclosed clean workshops.
Part | Material & Design Features |
|---|---|
Heat exchange tube | SUS304 / SUS316L seamless stainless steel tube; OD9.52 / 12.7mm, thick wall for pressure resistance |
Fins | Option 1: Full SUS304 stainless steel fin Option 2: Epoxy anti-dust coated aluminum fin (cost-saving, smooth non-sticky surface) Wide fin pitch 3.0~4.2 FPI, low dust accumulation |
Header / Manifold | SUS304 stainless steel, full argon shield welding, no internal rust scale |
Outer frame & drip tray | SUS304 stainless steel integral frame; sloped emergency drain pan for accidental dew risk |
Water accessories | SS automatic air vent, stainless steel drain valve on inlet & outlet |
Key Technical Specifications for Cleanroom
Air Side
Standard face velocity: 0.8 ~ 2.0 m/s (match low-turbulence clean airflow requirement)
Air pressure drop: ≤85 Pa, compatible with FFU and AHU low static fan design
Tube rows: 2 / 3 / 4 rows customizable (2 rows for light heat load; 3–4 rows for high heat generation equipment workshops)
Water Side
Standard dry coil chilled water: 16℃ supply / 21℃ return
Water flow velocity: 0.8~1.6 m/s, counter-flow layout to maximize sensible cooling efficiency
Single coil cooling capacity range: 3kW ~ 120kW, modular splicing for large cleanroom duct systems
Unique Advantages of Full Stainless Steel Dry Coil
Zero contamination risk for clean grade
No copper oxidation, no rust powder peeling; complies with GMP, semiconductor micro-particle control standards. Suitable for sterile pharmaceutical, wafer, medical device production.
No condensate, eliminate mold & bacteria hazard
No drain system required under normal operating conditions; avoid microbial breeding caused by condensed water inside air ducts.
Strong corrosion resistance
SUS316L version resists trace acid/alkaline vapor, disinfectant mist common in pharmaceutical cleanrooms, extending service life greatly vs copper coils.
Easy sanitation & maintenance
Smooth stainless steel surface, dust is easy to blow off with compressed air; no dead corners for dirt accumulation, convenient regular cleanroom maintenance.
Stable humidity control decoupling
Separate temperature and humidity adjustment: MAU stabilizes RH, dry coil precisely adjusts indoor temperature, achieves ±0.1℃ precise temperature control.
5. Main Installation Types in Cleanroom
Duct-mounted inside recirculation AHU (most common for large-area clean workshops)
Ceiling suspended standalone SS dry fan coil above production lines
Compact coil modules matched with FFU unit for small local cooling zones
Typical Application Industries
Semiconductor wafer fab, microelectronics ISO Class 5–7 cleanroom
Biopharmaceutical, injectable medicine sterile GMP workshop
Medical implant & medical device assembly room
Precision optics, laboratory, cosmetic sterile filling workshop
Food aseptic packaging clean space
Optional Customization Items
SUS316L full construction for corrosive chemical cleanrooms
Anti-seismic reinforced frame for seismic zone factories
Integrated EC variable speed fan cabinet with stainless steel casing
Multi independent water circuits for zoned temperature control
Custom overall dimensions to fit existing AHU duct retrofitting
Retrofit Replacement Tips
If replacing old copper dry coils with stainless steel versions:
Keep original overall size, tube row count, water inlet/outlet position for direct drop-in installation without duct modification
Complete nitrogen water circuit pressure test after installation to check welding tightness
Match original design airflow to avoid abnormal temperature deviation or local dew formation
