First, let's talk about the security filter operation process. 1. Add liquid 2. Filter impurities 3. Treatment of residual liquid after filtration 4. Dry the security filter after filtration 5. Clean the security filter after drying Next, let's talk about the precautions for the use of security filters. 1. The security filter should try to avoid pressure changes in the filtering interval and filtration. 2. When disassembling and assembling the security filter, the filter plate should not be deformed, and the low-density cover should not be scratched, otherwise it will lead to leakage. 3. Security filter Be careful when cleaning to prevent foreign objects from entering the security filter. 4. When installing the security filter, the screws should be installed symmetrically and must be tightened to avoid leakage between the filter paper and the filter plate. Let's talk about the security filter. Maintenance points 1. If the sealing ring on the top cover of the security filter is found to be swollen or worn, it should be replaced in time. 2. The lifting pressure of the security filter needs to be repaired after 1001 times of use before it can be used safely.