Fully automatic self-cleaning filter Filtration principle:

Fully automatic self-cleaning filter, water enters the filter from the water inlet, first passes through the coarse filter element assembly to filter out larger particles of impurities, and then reaches the fine filter, after filtering out fine particles of impurities through the fine filter, the clean water flows through the water outlet discharge.

During the filtering process, the impurities in the inner layer of the fine filter gradually accumulate, and a pressure difference is formed between the inner and outer sides of the fine filter. When the pressure difference reaches the preset value, the automatic cleaning process will start: the drain valve opens, the hydraulic motor chamber and hydraulic cylinder of the main pipe assembly release the pressure and discharge the water; the pressure in the hydraulic motor chamber and the suction pipe drops sharply, due to the load Under the action of pressure, the dirt on the inner wall of the fine filter is sucked through the suction nozzle, flowed into the hydraulic motor chamber by the hydraulic motor, and discharged by the sewage valve, forming a sewage suction process. When the water flows through the hydraulic motor, it drives the sewage suction pipe to rotate, and the hydraulic cylinder piston drives the sewage suction pipe to move axially. The sewage suction device assembly completely cleans the entire inner surface of the filter screen through the combination of axial movement and rotational movement. The whole cleaning process will last tens of seconds. The blowdown valve closes at the end of the wash, the increased water pressure returns the cylinder piston to its initial position and the filter begins preparing for the next flush cycle. During the cleaning process, the normal filtering work of the filter is uninterrupted.

The principle of automatic backwashing:

As mentioned earlier, backwashing is achieved by the opening of the hydraulic valve and the movement of the hydraulic cylinder piston, and these are all controlled by the backwashing controller. The backwash controller can accurately control the hydraulic valve and hydraulic cylinder according to the pressure difference value transmitted from the inlet and outlet of the filter, and the power of the controller comes from the pressure of the pipeline itself.

Self-cleaning filter features:

The water supply is uninterrupted during backwashing, and the whole backwashing is realized in such a way that the suction nozzle nets every point of the filter screen. During backwashing, only a small local pressure between the suction nozzle and the fine filter screen changes, and the action of the collector and hydraulic cylinder does not affect the normal water supply. At the same time, the amount of water consumed during backwashing is very small, with a flow rate of 300m3/h. Take the filter as an example: the backwash flow rate is 35-40m3/h, the backwash time is 7-15 seconds, and the backwash water volume is 80-160L.