The core differences between the ordinary high-efficiency supply air outlet and the DOP liquid tank high-efficiency supply air outlet lie in the sealing structure, leak detection method and applicable cleanliness level. The detailed differences between the two can be compared from the following five dimensions:
| Comparison dimension | Ordinary high-efficiency air supply outlet | DOP liquid tank high-efficiency supply air outlet |
| Sealing method | It adopts a compression-type seal. Through sponge and rubber sealing strips, the filter frame is compressed by the frame bolts to achieve sealing. This is a “dry seal”. | The liquid tank seal is adopted. The frame is equipped with a dedicated liquid tank adhesive. The filter frame is inserted into the liquid tank adhesive to form a liquid seal, which belongs to “wet-type sealing”. |
| Leak detection method | The conventional dust particle counter is used for scanning and leak detection, to measure the particle leakage at the connection point between the filter and the frame. | Specialized DOP/PAO dust leakage detection. By using an aerosol generator to release particles, the leakage rate at the sealed area can be detected, with higher accuracy. |
| Sealing performance | The sealing performance is moderate. Due to the aging of the sealing strips and uneven compression force, there may be slight leakage. | The sealing performance is extremely excellent. The liquid seal structure can eliminate the gaps and there is almost no leakage, meeting the sealing requirements of high cleanliness level. |
| Applicable scenarios | Suitable for cleanrooms ranging from 100,000 to 10,000 grade, such as clean areas in electronics factories, food processing workshops, and auxiliary production areas in pharmaceuticals. | Suitable for high cleanliness environments of level 100 and above, such as sterile workshops in pharmaceutical industries (A/B class areas), semiconductor chip manufacturing workshops, and laboratory clean areas. |
| Maintenance cost | The sealing strips are easy to replace and have low cost; the filters are convenient to install and remove. | The liquid tank adhesive has a service life. Replacement requires cleaning the old adhesive and re-pouring it. The installation of the filter needs precise alignment. The maintenance cost is relatively high. |
