Afriq Water Filters for irrigation systems

Filters for Dripline Irrigations and Sprinkler Irrigation

irrigating for a greener tomorrow

Water filtration is important for ALL irrigation systems, including the Quick Coupling Sprinkler System

Filters in Irrigation Systems

filters for irrigation systems

Contact Us | Download Brochures and Pricelists

Filters for Sprikler Irrigation

Filters can extend the life of and lower the maintenance of your sprinkler system; even for some sprinkler systems that is used to spread solids, such as manure, which usually have incorporated some form of filtration upstream of the system to prevent solids which are too large from entering the system.

... read more

Even if the sprinkler system can easily handle a fairly good size grain of sand without clogging, removing that sand grain is still advantageous as it will eliminate the wear on the system caused by the sand grain as it passes through.

Some example text. Some example text

Some example text. Some example text

Filters for Drip Irrigation

For drip systems, filters are an absolute necessity to prevent emitters from becoming clogged.

Always use the highest level of filtration that is practical.

... read more

Even if small sand particles can pass through the dripline system without blocking it, they cause wear on the equipment. The use of filters extends the lifetime of dripline significantly.

While sand is probably the most obvious thing that needs to be filtered out of the water, organic materials can be just as important to remove.

Algae can grow inside the system, especially in drip tubes. When a small piece of organic matter snags somewhere in a valve, fitting, emitter, or sprinkler, the organic matter by itself may not be large enough to be a problem - BUT another piece comes along and gets caught in the first. Then a very small grain of sand that would normally have passed through the system without problems becomes caught in the organic matter. Soon a large build-up forms and the flow is blocked.

What if you already have an irrigation system without a filter?

To install a filter or filters into an existing irrigation system is a piece of cake and can be inserted at any stage between the sprinklers or dripline and the water source.

Types of Filters

which filter to install

Contact Us | Download Brochures and Pricelists

Double Plastic Filters

(threaded with stainless clamp)

available in 70m3/hr and 100m3/hr

Double Plastic Filters

... read more

Double Plastic Filters

Double Plastic Filters

Double Plastic Screen Filter
Download brochure for technical specifications

Double Plastic Filters

Double Plastic Disc Filter
Download brochure for technical specifications

Double Plastic Filters

Single Plastic Filters

(threaded with stainless clamp)

available in 40m3/hr, 48m3/hr and 55m3/hr

single Plastic Filters

... read more

single Plastic Filters

single Plastic Filters

Double Plastic Screen Filter
Download brochure for technical specifications

single Plastic Filters

Double Plastic Disc Filter
Download brochure for technical specifications

single Plastic Filters

Y-Type Filters

(Smaller Filters)

available in 6m3/hr, 7m3/hr, 10m3/hr, 15m3/hr, 20m3/hr and 25m3/hr

Y-Type Filters

... read more

Y-Type Filters

Y-Type Filters

Y-TypeScreen Filter
Download brochure for technical specifications

Y-Type Filters

Y-Type Disc Filter
Download brochure for technical specifications

Y-Type Filters

Which Filter to Install

When deciding which filter to install, the following factors should be considered:

  • The source of the water
  • The level of filth in the water (the density of pollutants)
  • Flow rate of water
  • Diameter of pump outlet

... read more

Some example text. Some example text

When deciding between a disc and screen filter, consider the quality of the source of water. If you are mainly concerned with sand and bigger debris, a screen filter will be enough. If you are also concerned with algae and other organic material, a disc filter would be better suited to your needs.

consider the cubic meters that needs to be filtered per hour (m3/hr). You can either go for a big filter at the start of your system, or smaller filters at the start of each individual field.

Both the Single and Double Plastic Filter comes in a "long" and "short" version. The long filter has more filtration area and should be used for dirtier water to extend the time between cleaning cycles, whereas the shorter filter can be used with cleaner water.

Screen cartridges

Y-Type Filters

Screen cartridges are probably the most common filters and are excellent to remove hard particles - such as sand. They are not ideal to remove organic materials such as algae and slime. These non-solid materials tend to embed themselves into the screen material where they are very difficult to remove OR they simply slide through the holes in the screen.

... read how to clean

To clean, remove the flushing cap, all the "bigger" pieces will flush out. Also flush them with a stream of water or removing the screen and cleaning it by hand. Periodically hand clean the screen to remove garbage not removed by flushing.

Disc cartridges

Y-Type Filters

Disc cartridges are good at removing both particulates, like sand and organic matter. A disc filter consists of a stack of round discs. The discs have minuscule spaces between them when stacked together. The water is forced between the spaces between the discs, and the particulates are filtered out because they won't fit through these gaps. The organics are snagged in between the discs.

... read how to clean

To clean, remove the flushing cap and the bigger pieces will flush out. For more thorough cleaning of the filter, remove the discs and hose them off.

Irrigation Filters

how to use your filters with a fertiliser system

Contact Us | Download Brochures and Pricelists

How to calculate the size filter needed

To calculate the size of the filter needed the best and safest way is to ensure that the filter needed has a larger capacity than the flow of water. Determine the flow and choose the filter that is bigger than the source flow rate.

To calculate the cubic meter required using the pump as guide use the max rated flow rate as the minimum size and upsize to the next size filter. If your pump is rated to deliver 40 000 litre per hour, you will need a filter that can accommodate a minimum of 40 m 3hr.

... view calculation example

E.g. if you have 30 cm spacing for a field with 18 lines of a 100 meter each with a flow rate of 2 litre/h. The number of emitters multiplied by the flow rate per hour of the emitters.
= [(1m/.3 spacing) x 100 (Length of the dripline)] X 18 lines
= [3.33 X 100] X 18
= 5994 emitters
= 5994 emitters @ 2 litre/hr per emitter
= 11988 litre/hr flow rate for the entire field.
You will need a filter that can accommodate at least 12m3/hr, but it will be advised to use one size up which is the 15m3/hr Y-type filter.

How to use your filters with a fertiliser system

It is important to fertilise your crops, and fertilisation can most effectively be applied through the irrigation system.

Some example text. Some example text

For high flow volumes a fertilizer dosing pump, a positive displacement pump or a fertilizer tank can be used. The fertiliser tank should be installed before the filter.

If fertilisers are not applied through a filter, the undissolved fertiliser particles can cause blockages at the emitters.

Matters to consider with fertilising through a dripline irrigation system:

  • Phosphoric fertiliser should rather be applied directly to the soil.
  • Only add the fertiliser once the system has reached full pressure, and all the lines are filled with water.
  • The fertiliser should be dissolved completely and applied via a fertiliser tank.
  • The system should be operated at least 30 minutes to ensure that all the fertiliser has been applied, and nothing is left in the dripline system.