The AGF fully automatic shallow filtration system is composed of multiple standard high-speed sand tank units with unique water distributors and collectors inside, featuring a unique bidirectional automatic backwash valve that enables individual backwashing of each standard high-speed sand tank during normal system operation, with fully automatic program control, which has the advantages of low backwash water consumption, convenient equipment installation and easy operation. The device has large flow rate and requires no maintenance. There are such two series as vertical and horizontal type depending on different user requirements, being suitable for water quality treatment in industrial and domestic circulating water systems. (UN stands for UNIT)

The product has a compact structure and a high degree of automation. Its unique structure enables the outflow water turbidity to be below 0.5NTU and the impurity filtration accuracy to reach 5 microns. The equipment can be backwashed automatically, and the product not only performs well but also has low operating costs.

Forward filtration status:

When the system is in the filtering state, the unfiltered water is evenly distributed through a unique water distributor developed by itself, and the water flows laminar through the packing layer (refined uniform quartz sand/garnet) inside the filter. As the water flows through the packing layer, impurities are retained within it. There are multiple evenly distributed water collectors at the bottom of the filter, which collect the filtered water evenly and lead it out. Cross-flow filtration enables the filter to filter at a high flow rate and still achieve a good filtration effect.

Backwashing status:

As impurities keep accumulating in the packing layer, the internal head loss will keep increasing. When the inlet and outlet water pressure head losses reach the set value, the system will automatically activate the constant pressure device to switch it to the backwash state. When this backwash is completed, the hydraulic valve changes the water supply direction to achieve backwashing of each unit one by one, which makes it easier to clean the accumulated impurities.

When the system is in the backwash state, the filtration continues, therein, the standard unit sand tank to be backwashed does not filter, while the other standard unit sand tanks in the system are still filtering. Part of the filtered clean water is used to backwash the standard unit sand tank, and the rest is sent to the user. Backwash wastewater is discharged through the backwash drain of the hydraulic valve. In the high-speed sand tank fully automatic high-efficiency filtration system, the special collector design enables the fillers to rub against each other, maximizing backwashing efficiency, reducing the required backwash water (washing water), and without material loss during backwashing. A standard unit sand tank is backwashed for 2 minutes. When the backwashing is completed, the head loss inside the standard unit sand tank is reduced to a reasonable range, the constant-pressure device gives a recovery signal, the hydraulic valve returns to the filtering state, and the next standard unit sand tank is ready to enter the backwashing state.

1. Small size, easy installation and space saving. It can be installed outdoors without building a house, saving on civil construction costs;

2. Good anti-corrosion performance and long service life of the equipment;

3. Large volume of filtered water, good filtration effect;

4. Automatic backwashing: The backwashing of the equipment is automatically identified and controlled by the intelligent control system without human intervention. Even if the suspended matters in the water fluctuate, the equipment may adapt automatically.

5. Uninterrupted water supply: When the device backwashes, the filtration process is carried out simultaneously and the system supplies water as usual;

6. Use a unique cloth and water collection device;

7. Use refined preferred quartz sand or garnet as the filter medium;

8. Low long-term operating costs, saving electricity, water and maintenance costs.