1. When installing the insert filter, the O-ring should be wetted in the clean parallel filtrate to reduce the friction during insertion. It is required to insert the bottom to ensure that the two O-rings are sealed.

2. When installing the snap-in filter element, it is necessary to rotate the positioning clockwise.

3. If the filter has a pressure plate, press the pressure plate on the rocker and gently press the spring on the pressure plate. If the spring is too tight, the filter element will have distortion and affect the filtration accuracy.

4. When filtering the liquid, first open the exhaust switch on the outer casing, empty the gas in the filter cartridge, and let the liquid fill the filter cartridge, otherwise it will affect the flow.

5. The fluid filter will have a pressure drop due to the resistance. In order to overcome the resistance, there must be enough working pressure. In order not to cause the filter element to be subjected to a large flow, the valve should be slow.