Irrigation systems water filtration, filter selection and recommendation [1 out of 5]

Water filtration is very important to almost any irrigation system.

Appropriate filtration can help to extend the life and improve the maintenance of any irrigation system. For drip or micro sprinklers emitters, filtration is a basic need to avoid clogging.

A sand grain, rust and other materials can block micro and mini and sprinklers nozzles which could cause unintentional plants dehydration. Many water sources like reservoirs, rivers and of course waste water contain a lot of organic materials such as alga and bacteria, that have to be removed especially from drip irrigation, mist spray [Nebulization] and micro-sprinkle systems, as small as they are. Not removing those substances can lead to creation of dirt accumulations and colonies of harmful material within the emitters and the rest of the equipment. Naturally, rust and sand grains are a safe platform for coating by organic materials and creating large chunks within the systems, causin g a total blockage of water transferring.

Filtration methods common in irrigation systems

Screen Filters
Screen filters are probably the oldest and most common in irrigation systems. They are excellent in their ability to remove hard particles like rust. But when it comes to sand, it can get stuck inside the screen and rapidly block it. Usually Screen Filters are less expensive. Delicate organic materials cross the screens and raw material usually smears on top of the screens, deriving a more frequent cleaning interval. The common solution in Screen Filters is enlarging the filtration to expand the cleaning intervals. Today, there are several modern solutions of self-cleaning Screen Filters. This is done by back-washing and / or repeat wash using a sprinkler with internal spraying nozzles for cleaning (similar methods used in commercial dish-washers machines). In order to wash the filter in clean water, it takes at least 2 parallel fil ters, so that one contributes clean water to wash the other. Semi automatic screen filters are available as well, when the filter is being washed by turning a manual crank that rotate internal nozzles spine or a circular brush. If there is no automatic self-cleaning mechanism, the use of Screen Filters is not recommended in case the water contains organic materials. Clogging of material on top of the screens causes a large pressure difference that can bring to the collapse of the screen, or decreasing and even full stopping of irrigation water flow. The Screen Filter is cleaned by removing the screen and washing it under strong flow of water or by using a suitable brush. The common screen filtration elements in the market are usually made of Stainless Steel, Polypropylene or Nylon. Semi automatic screen filters are available as well, when the filter is being washed by turning a manual crank that rotate internal nozzles spine or a circular brush. If there is no automatic self -cleaning mechanism, the use of Screen Filters is not recommended in case the water contains organic materials. Clogging of material on top of the screens causes a large pressure difference that can bring to the collapse of the screen, or decreasing and even full stopping of irrigation water flow. The Screen Filter is cleaned by removing the screen and washing it under strong flow of water or by using a suitable brush. The common screen filtration elements in the market are usually made of Stainless Steel, Polypropylene or Nylon.

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