The replacement cycle of filters varies depending on multiple factors such as filter type, usage scenario, water quality, and frequency of use, and cannot be generalized. Below are the approximate replacement cycles for some common types of filters:
Water Purifier Filters
PP Cotton Filter: It is recommended to replace the PP cotton filter every 3-6 months. The PP cotton filter primarily filters large particles, sediment, etc., and its filtration effect gradually decreases over time, thus requiring regular replacement.
Activated Carbon Filter: It is recommended to replace the activated carbon filter every 6-12 months. The activated carbon filter primarily adsorbs unpleasant odors, residual chlorine, and other harmful substances from water. It needs to be replaced once it reaches saturation. Some special types of activated carbon filters, such as granular refined coconut shell activated carbon filters and block sintered activated carbon (CTO) filters, also have a replacement cycle ranging from six months to a year.
Ultrafiltration Membrane Filter: It is recommended to replace the ultrafiltration membrane filter every 12-24 months. The ultrafiltration membrane filter has a high filtration precision and can effectively remove bacteria, viruses, and other harmful substances from water, with a relatively long service life. In particular, the hollow fiber ultrafiltration membrane (UF) filter can have a replacement cycle of up to 3 years or more.
Reverse Osmosis Membrane Filter: It is recommended to replace the reverse osmosis membrane filter every 24-36 months. The reverse osmosis membrane filter has the highest filtration effect and can remove heavy metal ions, pesticide residues, and other harmful substances from water, with the longest service life.
Filters for Other Equipment
Hydraulic Oil Suction Filter: For equipment such as injection molding machines, the replacement cycle of hydraulic oil suction filters is generally every 3 to 6 months, but the specific cycle needs to be determined based on actual conditions. If a significant amount of impurities and particles are found in the hydraulic oil during use, or if abnormal phenomena occur in the hydraulic system, the filter should be replaced promptly. For hydraulic oil suction filters and hydraulic return oil filters, typically, the hydraulic oil suction filter is replaced every 2000 hours of operation, while the hydraulic return oil filter is replaced after 250 hours of operation and then every 500 hours thereafter.
Oil Filter: Generally speaking, the replacement cycle of oil filters is every six months, but the specific timing may vary according to the vehicle manufacturer's recommendations and usage conditions. The actual replacement timing should follow the recommended maintenance schedule from the automobile manufacturer.
Precautions
The replacement cycle of filters is not absolutely fixed. In actual use, it should be adjusted flexibly based on the degree of filter contamination, usage effectiveness, and the operating state of the equipment.
Regularly check the condition of the filters and clean or replace them promptly to ensure the normal operation of the equipment and the safety of water quality.
When replacing filters, follow the operation methods and steps recommended by the manufacturer to avoid damaging the filters or reducing their filtration effect due to improper operations.
- In summary, the replacement cycle of filters is a flexible issue that needs to be determined based on specific conditions. During use, close attention should be paid to the working state and usage effectiveness of the filters to ensure the safe operation of water quality and equipment.