H14 HEPA Filter Unit - High Efficiency Air Purifier from China Suppliers and Factory, 99.99% Filtration at 0.3um
Semiconductor chip fabrication rooms, LCD panel production lines, precision PCB assembly rooms.
Sterile preparation areas, vaccine production lines, Bio Safety Laboratories (BSL-2/3), sterile filling lines.
Hospital operating rooms, sterile wards, ICUs, bone marrow transplant wards.
Aseptic packaging areas, probiotic production zones, dairy product fermentation rooms.
Animal laboratories, microbiology labs, precision instrument rooms.
- 1 Casing: Usually made of cold-rolled steel plate with powder coating or stainless steel, used to house the filter and the plenum box.
- 2 Plenum Box: An empty chamber inside the casing, located above the filter. Its functions are: Pressure Equalization — converts velocity pressure from the duct into static pressure, ensuring airflow passes uniformly through the entire surface of the high-efficiency filter media, preventing uneven airflow distribution. Velocity Reduction — stabilizes airflow and reduces turbulence.
- 3 High-Efficiency Particulate Air (HEPA) Filter: This is the core component, typically a HEPA filter.
- 4 Diffuser Panel: Installed at the air outlet, usually made of aluminum or plastic, with regularly arranged holes or slots. Functions include: Further Airflow Equalization — ensures clean air is delivered as vertical laminar flow or uniform turbulent flow. Filter Protection — prevents objects from directly touching the expensive HEPA filter core.
- 5 Damping Layer: Some designs include a perforated plate or damping mesh inside the plenum box to assist with airflow distribution.
Filtering efficiency for particles ≥ 0.3μm. The standard high-efficiency filter widely used across cleanroom environments.
A higher-grade filter for 0.1–0.2μm particles. Used in ultra-high standard fields like semiconductors and biosafety laboratories.
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.
The resistance of a filter increases with higher airflow rates. By increasing the surface area of the filter media, the relative velocity of air passing through the filter can be reduced, thereby decreasing the resistance.
Remarks: (1) Initial resistance tolerance of ±10% (2) Support customer size