Obstruction of sprinklers and drippers is one of most significant problems encountered in irrigation systems. Most common reason of the obstruction is about minerals, organic and inorganic materials found in the water resource. Process of filtering water in the irrigation system is referred as filtration. Filtration is the best protection method against avoiding entrance/obstruction of dripper, sprinkler, hydrant and other similar equipments used in the irrigation system by sediments. Because, process of finding the obstructed dripper, to clean or replace the dripper is very costly and laborious. Therefore, filtration is most significant control unit of an irrigation system.

Download General Filtration Systems Catalogue

Filter Selection Table

Water Source	Type of Filter to be Used
Network Water	Screen Filter Hydrocyclone (Sand Separators) Disc Filter
Well Water	Disc Filter Hydrocyclone (Sand Separators) Screen Filter
River or Stream Water	Disc Filter Gravel Filter and Disc Filter System Gravel Filter and Screen Filter System Gravel Filter and Hydrocyclone System
Lake or Pool Water	Disc Filter Gravel Filter and Disc Filter System Gravel Filter and Screen Filter System Gravel Filter and Hydrocyclone System
Spring or Artesian Well Water	Screen Filter Hydrocyclone(Sand Separators) Disc Filter
Water Supply Containing Organic Material	Disc Filter Gravel Filter and Disc Filter System Gravel Filter and Hydrocyclone System
Water Supply Containing Sand	Screen Filter Hydrocyclone (Sand Separators) Disc Filter

Mesh and disc numbers based on particulate matter dimension classification

Particle Class	Particle Size (mm)	Screen-Disc Number (mesh)	Screen-Disc Number (micron)
Very Rough Sand	1.0 – 2.0	10 – 18	1500 – 850
Rough Sand	0.50 – 1.0	18 – 35	850 – 420
Intermediary Sand	0.25 – 0.50	35 – 60	420 – 250
Fine Sand	0.10 – 0.25	60 – 160	250 – 100
Very Fine Sand	0.05 – 0.10	160 – 270	100 – 50
Silt	0.002 – 0.05	270 – 400	50 – 30
Clay	< 0.002	> 400	> 30

Filtration Degree Conversion Table

Micron	25	30	40	50	80	100	130	150	200	400	800	1500	3000
mm	0.025	0.03	0.04	0.05	0.08	0.1	0.13	0.15	0.2	0.4	0.8	1.5	3.0
Mesh	650	550	400	300	200	150	120	100	80	40	20	10	5