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Adaptor 1 way for iDrop

Adaptor 1 way for iDrop

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Dripper iDrop Normal 8l/h

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Filters and fertigation

The clogging of emitters (drippers, sprinklers and driplines)is the most important drawback of micro-irrigation systems. The water flow sections ranges for this type of components vary from a few tenths of millimeter to a maximum of approximately 2 millimeters. Without a thorough removal of all impurities before the water flows through the nozzles, the risk that they might clog is considerable. An essential preventive action, in this respect, is ensured by filters, positioned just downstream from the pump or next to the sectors that compose the system. The choice of an effective filtering system requires the knowledge of few essential parameters, such as the kind of source of the water to be filtered, the maximum expected flow rate, the minimum and maximum working pressure and the destination of the filtered water. The quality of the water to be treated, i.e. the percentage of suspended solids, is a decisive factor for the choice of the system to be adopted.

Irritec filters and filter batteries shall be used only to separate the suspended particles which may be identified in the water, and are designed to prevent the irrigation systems from clogging. These systems cannot perform chemical or biological filtering.

All Irritec filters are manufactured from high-quality technopolymers, submitted to the tests required by international standards. Their materials can resist aggressive physical or chemical agents and all the substances normally used in the sewage irrigation field. All the metal components which may be used for filters and filter batteries are made of stainless steel or are protected against oxidation by galvanizing processes or treated with zinc phosphate and following electrostatic application of epoxypolyester painted layer.

Subcategories

Disk filters (8)

Disk filters have simple and safe frame, which minimizes the need for maintenance. In fact they integrate the benefits of the sand media filters and the screen filters -they are suitable at filtering both particulates, such as sand, and organic debris. These filters can withstand pressure drops and external stress, and their main feature is the strong, flexible filtering element.

The disk cartridge consists of small polyethylene discs, grooved on both sides. The filtration discs are tightly staked and compressed together by the spring (for the smaller models) or tightening nut (for the bigger models) on a specially designed spindle. When the disk elements are stacked, the grooves on top of every disk run opposite to the groove below. This creates a filtration "net" of intersecting grooves which trap the debris.

Cleaning of the disc filters is done by removing the disk cartridge from the filter’s body and unscrewing the disc's tightening nut. When the disks are released (no need to disassemble the cartridge) they need to be washed under strong flow of water. 

Sand media filters (16)

Water sources such as lakes, rivers, dams contain high amounts of organic substances like mud, algae and slimy particles, which have to be removed especially from micro-sprinkler, drip irrigation and mist spray systems. If the water is not cleared from these substances this can cause creation of dirt accumulations and clogging of the irrigation systems.

Best method for filtering water from open water sources is using sand media filters.

The sand media filters perform thefiltration by forcing thewater through a chamber filled usually with quartz sand. When the water passes through the spaces between the grains the organics are stopped by the sharp edges of the quartz particles. The filtration qualitydepends on the size of the sand practices. In most cases the irrigation systems require 100 - 130 micron filtering grade which can be achieved by using separated quartz sand with particles size 0.8 – 1.2 mm.

Cleaning of the sand media filter is done by back-washing performed by changing the water stream direction. The water flows backwards through the filter, separates and lifts the sand which frees the debris and washes it out through a flush valve.

There are two types of sand media filters – single chamber and double chamber. Single chamber sand media filters usually works in groups (two and more filters together) because during the back-washing process the flushed filter chamber is using clean water from the other filters.

Hydrocyclone filters (0)

Hydrocyclone filters are suitable for irrigation water from wells, rivers and lakes, with a considerable amount of suspended sand.

The tangential entry of water generates a whirling motion with a centrifugal movement which enables the separation between water and heavy particles. Due to the difference in density and specific gravity, the water will come out from the top while the heavier sand will precipitate to the center of the whirlpool accumulating in the appropriate tank. It is normal some very small amount of sand to pass through a hydro-cyclone filter, this necessitates the installment of additional disk or sand media filter.

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