Second step feed: when pressure filter press tight, can carry on feed operation: open feed pump, and slowly open the feed valve, feed pressure gradually increase to normal pressure. At this time, the leakage of the filter press and the filter plate is observed. After a period of filtration, the discharge of the outlet of the filter is gradually reduced. It shows that the filter residue is gradually filling up. When the outlet is not out of liquid or only a small amount of liquid, it is proved that filter cake is full of filter cake. If the filter cake is washed or air dried, the operation can be carried out afterwards, and the cake unloading operation can be carried out without washing or air drying operation.

The third step is washing or air drying: after the filter cake is filled, the feed pump and the feed valve are shut down. Open the washing pump or air compressor, slowly open the washing liquid or air inlet valve, wash or dry the filter cake. After the operation is completed, the lotion pump or air compressor and its valves are closed, and the unloading operation can be carried out.

Fourth step unload pancake: first close the feed pump and feed valve, enter the lotion or inlet device and valve, then press the "loosening" button on the operation panel, the piston rod drives the pressing plate back, after returning to the appropriate position, release the "loosening" button, pull the filter cake manually and remove the filter cake manually, and clean the sticky sticky at the same time. The filter residue on the front cover prevents the filter residue from being clamped on the sealing surface and affects the sealing performance, resulting in leakage.