High efficiency filter leak detection test case and application
In the clean room, high efficiency filters are the key to achieving high cleanliness air purification. Therefore, after the high-efficiency filter is installed or replaced, the filter installation joint must be leak tested to ensure that the clean room is clean. First, the instrument Accurately measure the quality of high-efficiency filters to avoid high-efficiency filter leaks and affect production. Method: Detect the high-efficiency filter for leaks by counting dust particles. Result: If the suspended particles at each point are detected beyond the requirements of the clean area, there is a leakage phenomenon, which needs to be plugged or replaced. Dust particle counter Second, the experimental principle The light scattering principle is applied, and the light reflected by the dust particles is received by the photomultiplier tube during the measurement to determine the size and quantity thereof, and the cumulative and digital display is analyzed. Third, the experimental method 3.1 Environmental conditions: temperature control at 18-26 ° C; relative humidity control at 45-65% 3.2 Test status: Static test, no more than 2 indoor testers. 3.3 Pressure difference: For different indoor cleanliness rooms, the static pressure difference is 5Pa, and the static pressure difference between the clean area and the non-clean area is 10Pa; for the room with large dust production during the process, the relative humidity should be maintained. . 3.4 Test method 3.4.1 The dust particle counter is disinfected with water for injection and 75% alcohol, and then irradiated to the clean area by ultraviolet light for 30 minutes. 3.4.2 Place the dust particle counter horizontally on the table. Measure the plastic tube port and plug it into the connector of the filter. 3.4.3 Turn on the power. After the instrument performs the tl check and the option, the measuring plastic tube is removed from the rear panel. The port is placed where it needs to be measured 3.4.4 detection sampling head 2-4aTl, along the border of the high efficiency filter and the intermediate from slow scan filter efficiency, low efficiency filter each test the five points, the display data observed. After the test is completed, the sampling plastic tube port is connected to the dust particle counter rear panel for tl inspection. Then turn off the power. The dust filter counter is used to measure the high-efficiency filter of the 100-level clean zone. See Table 1 Fourth, the conclusion From the above measurement, it can be seen that the No. 3 high-efficiency filter has a leak phenomenon. Need to be plugged or replaced, the filter must be retested after repair or replacement. Under normal conditions, the high-efficiency filter leak test is generally performed once a year to see if there is a change. It is an important part of the cleanliness test. Shanghai Sujing Industrial Co., Ltd. If you have any needs, you can always pass with me, thank you very much for your support to Sujing, look forward to working with you. have a pleasant workday! Thankyou&Bestregard! SUJING—JINGHUA Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.anabolicsteriod.com