The initial resistance of the HEPA refers to the resistance of the HEPA filter to the air as the air flows through the HEPA filter. The final resistance refers to the additional resistance caused by the accumulation of dust on the surface of the filter media and the increase in differential pressure after long-term operation of the HEPA filter.
The initial resistance of a high-efficiency filter is usually around 200Pa, depending on the structure of the filter, the type of filter media and the filtration efficiency. Generally speaking, the higher the filtration efficiency of the HEPA filter, the greater its initial resistance.
The final resistance is the additional resistance caused by the accumulation of dust and the increase in differential pressure on the surface of the filter media after a period of operation of the HEPA filter. This resistance value will gradually increase with the running time, but generally not more than twice the initial resistance.
In order to ensure the normal operation of the HEPA filter and prolong its service life, the HEPA filter needs to be cleaned and maintained regularly. The frequency of cleaning and maintenance depends on the environment in which it is used and the type of HEPA filter. In general, HEPA filters need to be cleaned and maintained every 3-6 months.
When cleaning and maintaining high-efficiency filters, the following points need to be noted:
1.Before cleaning, remove the HEPA filter from the system and take good care of the filter element and housing.
2.Use professional detergents and tools when cleaning, and follow the steps on the instructions.
3.After cleaning, dry the filter element and housing in time to avoid long-term storage in a humid environment.
4.Before installation, check whether the filter element and housing are intact, and replace them in time if damaged.
5.When installing, follow the steps on the instructions to ensure the tightness and stability of the HEPA filter.
In a word, the initial resistance and final resistance of the HEPA filter are two important parameters, which directly affect the operation effect and service life of the HEPA filter. Therefore, when using HEPA filters, they need to be cleaned and maintained regularly to ensure their normal operation and extended service life.