Leak detection steps for high-efficiency filters

2022-06-28 11:28

Both filters with partitions and filters without partitions cover high-efficiency and ultra-high-efficiency levels, and both can be made of galvanized sheet, stainless steel, and aluminum alloy profiles. Paper, aluminum foil board material is folded as a dividing board.

The production environment of high-efficiency and super-high-efficiency filters must meet the corresponding cleanliness standards. The air cleanliness level in the high-efficiency air filter assembly workshop reaches ISO8 (ie, 100,000-level clean room), and the ultra-high - The efficiency reaches ISO7 level (ie 10,000-level clean room).

At present, the commonly used leak detection aerosol is PAO, and PAO is polyalphaolefin, which is harmless to human body and is widely used at present. In addition, leak detection methods can be detected using aerosol photometers or particle counters. The particle counter detects the particle distribution of particles, which is often expressed in units of "particles/L", while the photometer detects the mass concentration of particles, expressed in "mg/L". As a result, there is a difference between the results obtained using a particle counter and a photometer when examining filter efficiency. Dust particle counters are slightly less sensitive and accurate than aerosol photometers. For on-site leak detection, the photometer is widely used because it is easy to use, the detection results are easy to judge, and the leak detection is relatively accurate.