How To Select A Suitable Filter for A Garden Irrigation System?

Surface water: If the water source is surface water such as rivers, lakes, or ponds, the water usually contains a large amount of suspended solids, sediment, algae, and organic matter. A sand filter can be selected as the primary filter, which can effectively remove large particles of impurities. Then, a screen filter or a disc filter can be used for fine filtration to meet the water quality requirements of the irrigation system.

Groundwater: Groundwater is generally relatively clear, but it may contain sand, gravel, and some minerals. For groundwater, a cyclone separator can be used first for preliminary separation of large particles of sand and gravel. Then, according to the specific situation, it can be decided whether to use a screen filter or a disc filter for further filtration of fine particles.

Reclaimed water: Reclaimed water contains various impurities, bacteria, and chemical substances. In addition to using conventional filtration equipment, disinfection equipment and special filtration media may need to be added to remove residual chemical substances and pathogens.

Sprinkler irrigation system: The sprinklers in the sprinkler irrigation system have relatively high requirements for water quality. Generally, the filtration precision of about 100 - 200 meshes is recommended to prevent the sprinklers from being blocked and affecting the spraying effect. A screen filter or a disc filter can be selected, which have high filtration precision and large flow capacity to meet the flow requirements of the sprinkler irrigation system.

Drip irrigation system: The drippers in the drip irrigation system have small orifices and are more likely to be blocked by impurities. Therefore, higher requirements are placed on the filtration precision, usually 200 - 400 meshes. The disc filter is the preferred choice for the drip irrigation system. It has a good filtration effect and can effectively intercept tiny particles, while also having good anti-blocking performance.

Bubbler irrigation system: The bubbler irrigation system has requirements for water quality that are between those of the sprinkler irrigation system and the drip irrigation system. The filtration precision is generally 150 - 250 meshes. According to the water source situation and the system flow rate, a suitable filter such as a screen filter or a disc filter can be selected.

Filtration precision refers to the size of the particles that the filter can intercept. Generally, the filtration precision of a garden irrigation system is between 80 - 400 meshes. If there are many impurities in the water or the irrigation equipment has high requirements for water quality, a filter with a higher filtration precision should be selected. If the water quality of the water source is good, the requirements for filtration precision can be appropriately reduced, but it is also necessary to ensure that the normal operation of the irrigation equipment is not affected.

The flow rate of the filter should match the design flow rate of the irrigation system. When selecting a filter, factors such as the total water consumption of the irrigation system, the number of sprinklers or drippers, and the number of units working simultaneously need to be considered to calculate the required flow rate of the filter. Generally, the rated flow rate of the filter is required to be greater than the maximum design flow rate of the irrigation system to ensure that sufficient water can be provided during the peak irrigation period.

The filter will generate a certain pressure loss during operation, which will affect the overall pressure distribution and irrigation effect of the irrigation system. Therefore, when selecting a filter, attention should be paid to its pressure loss characteristics. It is advisable to select a filter with a relatively small pressure loss. Especially in long-distance irrigation or in garden areas with complex terrain, the impact of the filter on the system pressure should be carefully considered.

When selecting a filter, the ease of its maintenance also needs to be considered. Some filters require regular cleaning or replacement of the filter element, such as screen filters and disc filters. A product that is easy to clean and has a simple filter element replacement process should be selected to reduce the maintenance cost and workload. At the same time, the material and structure of the filter should also be considered. Select a product that is corrosion-resistant, wear-resistant, and has a long service life to reduce the replacement frequency and maintenance cost.

Different types and specifications of filters have significant price differences. When selecting a filter, it is necessary to comprehensively consider according to the scale of the garden irrigation system and the budget. On the premise of meeting the water quality and flow requirements of the irrigation system, try to select a filter with a high cost-performance ratio to achieve the best investment efficiency.