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HOW WILL I KNOW WHEN TO CHANGE BAGS?

HOW WILL I KNOW WHEN TO CHANGE BAGS?
Update Time:2017-11-08
Monitor the inlet pressure. The pressure drop across a bag rises as the active surface area is used up. When the pressure starts to raise faster the bag is almost used up and should be changed. Every application is different, but a good rule of thumb is to change bags when you see 8-12 PSI pressure drop (the difference in pressure between the filter's inlet and outlet).