What are the application fields of DOP HEPA box and HEPA box?

Both liquid tank supply air outlets and ordinary high-efficiency supply air outlets are key equipment in the ventilation system of clean rooms, mainly used to control dust, microorganisms, and other pollutants in the air. However, their structural design and performance characteristics make them different in application fields. The following is a comparison of the core application scenarios of the two:
1. Liquid tank air supply outlet
Core characteristics
Sealing method: It adopts a liquid tank (usually an inert liquid, such as silicone sealant) for sealing, which has extremely strong sealing performance and almost no leakage risk.
Filtration efficiency: Usually paired with high-efficiency (HEPA) or ultra-high-efficiency (ULPA) filters, the filtration efficiency can reach over 99.97% (@0.3μm).
Structural features: It needs to be used in conjunction with a liquid tank-type filter, with high installation accuracy requirements. During maintenance, the entire filter needs to be replaced.
Application field
High-grade cleanroom (Class 100 and below)
Pharmaceutical industry: Sterile preparation production workshops (such as injection and eye drop production lines), clean operating rooms, and biosafety laboratories (BSL-3/4).
In the semiconductor/electronics industry, in chip manufacturing workshops (such as 12-inch wafer production lines) and precision electronic component assembly rooms, it is necessary to control particle contamination at the 0.1μm level.
Aerospace: Clean assembly environments for aviation instrument assembly rooms and satellite components to prevent fine dust from affecting the performance of precision instruments.
Scenarios with high sealing requirements
Negative pressure isolation ward: Prevents the leakage of harmful aerosols and ensures the safety of medical staff (such as isolation areas for COVID-19 patients).
Nuclear industry/Radioactive laboratory: Isolate radioactive particles to prevent the spread of contamination.
Biopharmaceutical research and development: Gene editing laboratories (such as CRISPR technology), cell therapy production workshops, preventing cross-contamination of biological samples.
High humidity or special environments
Food aseptic packaging workshop: The liquid tank seal is not easily affected by humidity and is suitable for long-term stable operation in high-humidity environments.
Cosmetic aseptic filling room: Ensures that products are free from microbial contamination and comply with GMP standards.
Ii. Ordinary high-efficiency air supply outlets
Core characteristics
Sealing method: Rubber strips (such as EVA, neoprene rubber) or mechanical compression sealing are used. The cost is relatively low, but the sealing performance is slightly inferior to that of the liquid tank type.
Filtration efficiency: The mainstream configuration is a high-efficiency filter (HEPA), and in some scenarios, an ultra-high-efficiency filter can be selected.
Structural features: Flexible installation and the filter can be replaced separately during maintenance. It is suitable for small and medium-sized clean rooms or scenarios with limited budgets.
Application field
Medium and low-grade cleanrooms (Class 1000 and above)
Food and beverage industry: Baking food cooling rooms, dairy product filling lines, controlling dust and microorganisms in the air.
Medical device production: Non-sterile medical device assembly workshop (such as a medical catheter, or in vitro diagnostic reagent production line).
Electronic clean workshop: Assembly of consumer electronics (such as mobile phones and computers) and optical lens production, meeting general clean requirements.
Laboratories and research scenarios
General chemistry laboratory: It is used for particulate matter control, but does not require strict sealing (such as university research laboratories and routine testing rooms).
Cosmetics research and development laboratory: Basic formula research and development stage, clean operation in a non-sterile environment.
Comfort purification scene
High-end office buildings/hospital waiting areas: Fresh air systems equipped with high-efficiency filters to enhance indoor air quality (such as PM2.5 filtration).
Biological safety cabinet air supply system: As an auxiliary air supply device, it reduces the load on the main equipment.
Iii. Comparison of Key Differences
Dimensional liquid tank supply air outlet, ordinary high-efficiency supply air outlet
Sealing liquid tank seal, zero leakage risk rubber strip, or mechanical seal, there is a possibility of slight leakage.
The filtration efficiency is higher (often equipped with ULPA), and the standard HEPA is mainly used.
High cost (equipment + filter replacement cost) low
The maintenance difficulty requires the entire filter to be replaced. If the difficulty is high, the filter can be replaced separately, which is convenient
Typical scenarios include high-risk and high-cleanliness demand environments, as well as conventional clean or comfort purification scenarios
Iv. Selection Suggestions
Priority should be given to liquid tank supply air outlets: If the scene involves high-risk contaminants (such as viruses, and radioactive substances), high cleanliness levels (such as ISO 5 and above), or requires long-term operation and strict leakage control, it is recommended to adopt the liquid tank type.
Give priority to choosing ordinary high-efficiency supply air outlets: If the cleanliness level requirement is not high, the budget is limited, or frequent maintenance and filter replacement is needed, the ordinary type is more cost-effective.
In practical applications, comprehensive decisions need to be made in combination with industry standards (such as GMP, and ISO 14644), pollutant characteristics, and operating costs.