In the domestic manufacturers, just off the assembly line of high efficiency filter for testing, failure rate of 3% to 10%, extreme cases, the failure rate can be as high as 30%. Sadly, hundreds of high efficiency filter factory, there are less than 10% of the test means, which can adhere to one by one test of the manufacturers is one of the few. A large number of untested high efficiency filters into the market, and many users do not pursue.
Visual inspection is not found the leak of the filter. For high cleanliness situations, a leaky filter is enough to make the whole project fail. Therefore, each high efficiency filter in the factory, must be in a special test bed for standard performance testing. Once a high-performance filter has been selected that is not tested step by step, the user is exposed to the risk of engineering failure.
Different filter manufacturers may use a different test method, the user may agree or suspect a particular method. The most basic principle is that manufacturers must be a high-performance filters for each routine tests, and specific test methods can be discussed another.
Most manufacturers hold a third party inspection report or certification of a high efficiency filter. These documents represent only the performance of the samples submitted, does not guarantee that you buy the batch of filters are qualified. In many cases, the more third-party reports a business presents to people, the more people wonder whether he or she really has the means to test it, and whether he or she does one by one testing the high-efficiency filters.
There is a strange phenomenon, a long time, many manufacturers and research departments continue to develop efficient filters, but few people to worry about detection means, so that the results of things used for a large, decent products are rare. Until 2001, there are still people to re-development of the so-called “0.1mm high efficiency filter.” Developed for many years, today’s domestic generous clean project, its high efficiency filter is still a small number of foreign manufacturers monopoly.
