China Stainless Steel Clean Laminar Flow Hood Factory - High-Quality Suppliers for Dust-Free Solutions
Widely used in electronics, biology, medicine, food, precision instruments and other industries requiring dust-free aseptic operating environments. Provides a local high-cleanliness working environment suited for sensitive processes and products.
Typically made of sprayed cold-rolled steel plate or stainless steel (SUS304, SUS316), known for high strength, corrosion resistance, and ease of cleaning.
Corners often feature rounded transitions to avoid dead angles, facilitating cleaning and preventing dust accumulation.
The "heart" of the laminar flow cabinet — providing the power for air circulation. Typically located at the top of the unit (fan on top, referred to as a "top-mounted fan" structure).
Usually employs high-efficiency, low-noise backward-curved centrifugal fans, capable of providing stable and adequate static pressure and airflow.
Often an EC Motor (Electronically Commutated Motor), enabling stepless speed control, offering energy savings and precise control.
This is the most critical part, determining the cleanliness effectiveness.
| Filter Type | Location | Function | Material / Notes |
|---|---|---|---|
| Pre-filterPrimary Filter | Near the fan intake | Filters larger airborne particles (dust, fibers) to protect HEPA filter and extend its service life | Non-woven fabric or nylon mesh; washable or replaceable |
| HEPAHigh-Efficiency Particulate Air Filter | Bottom of enclosure, facing the work area | Filters particles ≥0.3µm with efficiency up to 99.99%; ensures clean, sterile discharged air | Requires specialized sealing (liquid trough seal or mechanical clamping with gaskets) to ensure no leakage |
| ULPAUltra-Low Penetration Air Filter | Same as HEPA filter | For higher-standard applications; filtration efficiency ≥99.999% for particles ≥0.12µm | Used in semiconductors, bio-safety labs, and ultra-clean environments |
Located above the HEPA filter, it ensures air is evenly distributed before passing through the filter, thereby creating a uniform and stable vertical laminar airflow at the air outlet.
As dust accumulates on the filter media, the resistance increases. When the resistance reaches an unreasonable level, the filter must be discarded.
Sometimes, excessive resistance can cause previously captured dust to become dislodged and re-enter the airflow — when this risk arises, the filter should also be replaced.
