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Common filters for irrigation systems

Issuing time:2022-07-01 19:02
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1Centrifugal filter

Centrifugal filter (sand and stone separation filter) is mainly used to separate sand particles in water based on the working principle of centrifugal force of water circulation. It is suitable for primary filtration of water source with large sand content. Its advantages: no internal filter screen, convenient maintenance; Disadvantages: when the system is started and shut down, the flow rate of the system pipeline will drop and the filtration efficiency will drop, and the organic matter and impurities with lighter specific gravity than water cannot be separated and filtered.

2Sand filter

Sand filter is often used in agricultural irrigation system, which is generally composed of more than two filter units. It is a filter for three-dimensional deep filtration through sand bed formed by homogeneous quartz sand with equal particle size as the filter carrier, which is commonly used for primary filtration. It mainly uses sand and stone as filter material. During normal filtration, all units of the filter are filtered normally. During backwashing, one unit at a time is backwashed, and the rest units are filtered normally.

Whether it is organic or inorganic impurities, sand filter is the most ideal filtering method

3Mesh filter

Mesh filter is the most common filter, which directly intercepts the impurities in the irrigation water source. Its structure is simple and generally consists of a pressure bearing shell and an inner core filter screen; The pressure bearing shell is mostly made of steel, and the inner core filter screen has stainless steel mesh, nylon mesh, etc. Mesh filter is the best product for large area lawn, garden, agricultural irrigation and other water treatment.

4Laminated filter

The laminated filter uses a plurality of circular sheets overlapped together, with grooves on both sides of the sheets. The gap between adjacent two sheets can be adjusted by applying pressure on both ends of the sheet group. The filter filters out the impurities in the water through the gaps and fine lines between the sheets. The sheet is made of high molecular polymer and can resist the corrosion of various water bodies.

The laminated filter adopts modular design, and the number of filter combination units can be selected according to the system flow, which is flexible and interchangeable. The laminated filter stations with large flow are all composed of multiple units.

Laminated filter is commonly used for secondary filtration, combined with sand filter and centrifugal filter.

The cleaning methods of various filters are manual and automatic, which can be selected according to the water quality of the site water source and the frequency of use. The automatic cleaning mode is to backwash automatically by timing or the pressure difference between the inlet and outlet of the filter.

In practical application, the appropriate filter type should be selected according to the different emitters of the irrigation system. Most of the filters are used in combination to more effectively remove impurities in irrigation water.


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