How to confirm the replacement cycle of air filter

How to confirm the replacement cycle of air filter? The clean room has strict regulations on the humidity, temperature, fresh air quantity, state and illumination of the environment, which ensures the production quality of the product and the comfort of the working environment of the personnel The whole clean room system is equipped with a set of three-stage air purification system with primary, intermediate and filter filters, which controls the number of dust particles, settling bacteria and floating bacteria in the clean area As the end filter device, the filter determines the operation effect of the whole purification system, so it is very important to grasp the replacement time of the filter * let's start with the air filter In the clean and dust-free room, whether the air filter with large air volume installed at the end of the purification air conditioning unit or the air filter installed at the air supply outlet, these must have accurate operation time records and cleanliness and air volume as the basis for replacement For example, under normal use, the service life of the filter can be up to more than one year, For example, the service life of the good filter made by the front-end protection can be more than two years without any problem, of course, it depends on the quality of the air filter, maybe longer; secondly, the service life of the good filter made by the front-end primary effect filter protection can be more than two years, such as the air filter installed in the purification equipment, such as the filter in the automatic air shower room; For example, to clean the filter on the worktable, we can change the filter through the prompt of the differential pressure gauge on the worktable, The filter on the clean shed can determine the ideal time of air filter replacement through the detection of air speed of air filter For example, the air filter replacement on FFU fan filter unit unit is to replace the air filter through the prompt in PLC control system or the prompt of differential pressure gauge Third, some of our experienced air filter installers have summed up their valuable experience Here I'd like to introduce it to you I hope it can help you to grasp the time of air filter replacement more accurately When the differential pressure gauge shows that the resistance of air filter reaches 2-3 times of the initial resistance in the air conditioning unit, you should stop maintenance or replace the air filter In the absence of a differential pressure gauge, you can choose whether to change it according to the following simple two-body pattern: 1) check the color of the filter material on the upper and lower sides of the air filter If the color of the filter material on the air outlet surface turns black, you should prepare to change it; 2) touch the filter material on the air outlet surface of the air filter by hand, if there is more dust on your hand, you should prepare to change it; 3) record the change status of air filter for many times, and summarize the change cycle; 4) under the premise that the air filter does not reach the final resistance, the pressure difference between the clean room and the adjacent room decreases significantly, which may be that the resistance of the secondary efficiency filter is too large, so it is necessary to prepare for change; 5) if the cleanliness of the clean room fails to meet the design requirements, or negative pressure occurs, when the secondary efficiency air filter does not arrive at the time of replacement, it may be that the resistance of the air filter is too large, so it is necessary to prepare for replacement Shanghai Sujing Industry Co., Ltd if you have any need, you can pass with us at any time Thank you very much for your support and look forward to cooperating with you Thank you & bestragard! Suing Jinghua