It’s all about the filter
Irrigation Blog

It’s all about the filter

By Mark Jolles on 12 Sep 2017

Making sure your irrigation system works optimally for the long-term

Emitters clogging is one of the most significant problems in irrigation. Clogging can be caused by physical, chemical or biological contaminants and it can severely impact water application uniformity and will increase the need for everyday maintenance of irrigation systems.

As discussed in our previous post, a carefully designed irrigation system should include preventative measures to avoid emitter clogging. An important measure to take is installing an effective and reliable filtration system.

Types of filtration for irrigation systems

Different types of filters are available for removing contaminants from irrigation water. The most suitable filtration solution will be based on the water source, type and amount of contaminants in the water, the design and size of the irrigation system (including the emitter design), and the facility management and supervision practices.

Screen filters

Screen filters are the most popular type of filter used in irrigation systems. They are simple, economical, and are available in a wide range of shapes, sizes, and screen meshes. The screen is made of metal, plastic or synthetic cloth which is enclosed in a filter housing.

Screen filters are recommended for removing physical, inorganic material such as sand, scale and assorted debris, and can be cleaned manually or automatically.

Disc filters

Disc filters consist of a stack of discs, each with a series of microscopic grooves. The dimension of the grooves determines the mesh size of the filter. Water is filtered as it flows through the mesh created by the grooves.

Disc filters are recommended for removing organic matter such as algae.  Disc filters are cleaned by separating the discs and reversing the flow of water through them. The cleaning can be performed manually or automatically.

Sand media filters

Sand media filters consist of a tank (usually made of fiberglass, carbon steel or stainless steel) filled with silica sand or crushed granite. As the water flows through the matrix created by the filter media, contaminants are trapped in the media. The size and type of the sand media affects the filtering capacity and efficiency. Crushed silica filters better than sand because the angular particles of the crushed material fit together more closely.

Sand media filters are cleaned by back-flushing. These filters must be installed in banks of two units or more as during back-flushing water flow is reversed through one filter at a time, using the clean water from the other filter(s) to remove contaminants from the media.

Save money, water and time with Amiad Filtomat screen filters
Get ready to leave old media tanks behind and step into the future with more efficient technology.

  • Save Money
    The Filtomat arrives fully assembled, does not require a crane for installation and only incurs minimal installation costs. 
  • Save Water                                                                                                                                                                              The Filtomat uses 8 times less water for self-cleaning than a sand media system over a typical growing season.
  • Save Time
    A single self-cleaning cycle is 24 times faster than a sand media system.

 

Protect your investment with the most reliable screen filter —  Filtomat by Amiad  Download the PDF

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