65438+100000 What is the pressure difference between the primary and secondary air filters in the clean area?

The conventional filters in Runde purification practice refer to Class A and Class B specified in the high efficiency air filter standard, and are the most commonly used high efficiency filters in clean plant design. Generally, if it is higher than or equal to 654.38+ million, you can choose Class A.. Grade10,000 ~100 can be selected as grade B. The efficiency of conventional high-efficiency filters for particles ≥0.5μm can be calculated as 5 "9s" or 0.9999.