How often should the HEPA filter in the clean bench be replaced?

How often should the HEPA filter in the clean bench be replaced? When it comes to ultra-clean workbenches, I believe everyone is familiar with experimental instruments that are common in desktop laboratories, scientific research, biology and other fields
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So, do you know how often the high-efficiency filter in the ultra-clean workbench is replaced? Let’s find out with me below
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Fan filters are two important components in the ultra-clean workbench.
This is because the main purpose of the ultra-clean workbench is the process of air circulation and filtration.
The fan plays the role of the heart, which makes the air in the pump box continuously circulate and update.
, while the filter is used to capture the dust in the air to make the air clean
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Therefore, it can be said that the working process of these two components is also the basic means adopted by the ultra-clean workbench to achieve the purpose of cleaning
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As the use time of the ultra-clean workbench increases, the high-efficiency filter will be lost as the use time increases, resulting in a decline in its performance.
In order to ensure the smooth progress of the experiment, it is necessary to accurately grasp the replacement time of the high-efficiency filter.
, It is necessary to avoid the waste of parts caused by premature replacement, but also to ensure timely replacement to avoid the cleaning effect of the ultra-clean workbench being greatly reduced, so how often should the high-efficiency filter in the ultra-clean workbench be replaced? The replacement of the high-efficiency filter in the ultra-clean workbench generally depends on the situation.
Different use occasions, use frequency and maintenance will lead to different levels of loss of the high-efficiency filter.
Therefore, it depends on the high-efficiency filter in the ultra-clean workbench.
You can refer to two points for replacement: First, if the high-efficiency filter installed in the ultra-clean workbench has its own pressure differential gauge, you can use it.
If not, you can also plug the differential pressure gauge into the small hole for approximate measurement.
Then it is calculated according to the final resistance of the high-efficiency filter.
Generally, the initial resistance of the high-efficiency filter is 200Pa, and the final resistance is about 400-450Pa.
As long as the final resistance is reached, it can be considered for replacement
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The second is to use the example counter to measure.
If the dust particles exceed the standard, it indicates that the performance of the high-efficiency filter is poor and cannot capture the dust in the air, and it needs to be replaced at this time
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 　　The above is the relevant introduction about the replacement time of the high-efficiency filter in the ultra-clean workbench.
I believe that everyone has a corresponding understanding of this after reading it.
The replacement of the high-efficiency filter in the ultra-clean workbench depends on the situation.
helped
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