Irrigation system need efficient and reliable filtration solutions to both protect the drip irrigation system and improve water quality. When water has a considerable content of silt, the best solution are media filters, commonly used for filtration of water with organic contents such as leaves, seeds, algae, microorganisms, clay, coming from lakes, rivers, channels, open reservoirs, waste water.
Depending on water flow rate, quality and crop water requirements, one or more filters can be implemented. The filtration system consists in several parts:
- Zinc-coated or painted steel body
- Suction and drain manifolds
- Manometers and valves
- Backflush controller
Media filters operating principle imitates the natural process of soil filtration, where percolation through a media would filtrate impurities; so the thinner is gravel the more accurate is filtration. When water is forced to pass throught media filters, all impurities would be stopped there; also a hydrocyclone can be placed upstream, for a first rough filtration aiming to unload water, and a screen filter downstream as safety filtration for drip irrigation systems.
We supply a wide range of media filters (bodies without media), completely assembled, with suction and drain connections, backflush controller included in automatic media filter systems:
- Sand media filter system - manual or automatic backflush - made of 2 gravel filter stations 2" - DN 80 manifold - filtrating flow rate 30÷40 m³/h;
- Sand media filter system - manual or automatic backflush - made of 2 gravel filter stations 2" - DN 100 manifold - filtrating flow rate 40÷60 m³/h;
- Sand media filter system - manual or automatic backflush - made of 3 gravel filter stations 2" - DN 100 manifold - filtrating flow rate 45÷60 m³/h;
- Sand media filter system (24") - manual or automatic backflush - made of 2 gravel filter stations 3" - DN 100 manifold - filtrating flow rate 50÷60 m³/h;
- Sand media filter system (24") - manual or automatic backflush - made of 3 gravel filter stations 3" - DN 100 manifold - filtrating flow rate 70÷80 m³/h;
- Sand media filter system (24") - manual or automatic backflush - made of 3 gravel filter stations 3" - DN 125 manifold - filtrating flow rate 80÷90 m³/h;
- Sand media filter system (36") - manual or automatic backflush - made of 2 gravel filter stations 3" - DN 125 manifold - filtrating flow rate 85÷95 m³/h;
- Sand media filter system (36") - manual or automatic backflush - made of 3 gravel filter stations 2" - DN 150 manifold - filtrating flow rate 150÷170 m³/h;
- Sand media filter system - manual or automatic backflush - made of 4 gravel filter stations 3" - DN 150 manifold - filtrating flow rate 200÷240 m³/h.
Media filters need periodical maintenance, called backflush, which consists in inverting the flow of water, thus eliminating trapped materials and bringing back filtration capacity to initial levels:
- manual backflush: backwashing cycle starts when flow is inverted manually, system is equipped with manual valves;
- automatic backflush: backwashing cycle is regulated by an electric or battery backflush controller, no need for labour, system is equipped with electric three-way valves.
