For below 2 Acres, Small agriculture lands, or Leased lands permanent raingun system is costly. In this case we must portable economic raingun or sprinkler system. This is cheapest method with same irrigation benefits. Low initial investments, Minimum pipelines, can operate with portable engines or single phase electric pump sets, choices are there for solar operations.
Though it is cheap, some limitations are there in this system. 1. Leakages in pipe joints and Fittings. 2. Labour Oriented.
If Grid Power available areas, we can go for high pressure electric motor operated rainguns system based on crop. Following are the popular models.
| 1. | Power - HP or kw | : | 1.5 HP or 1000 w | |
| 2. | Operating voltage | : | Single phase 175 to 255 v AC | |
| 3. | Discharge Maximum | : | 220 LPM . | |
| 4. | Pressure maximum | : | 2.2 kg/cm2 | |
| 5. | Head range | : | 15 to 20 meters | |
| 7. | No of 3/4" Sprinkler runs | : | 6 nos with each 80 feet diameter | |
| 8. | No of 1/2" sprinklers runs | : | 20 nos with 50 feet diameter | |
| 9. | No of Micro sprinkler runs | : | 40 nos | |
| 10. | Time needs to wet 3 inches depth | : | 1 HOUR | |
| 11. | Best suitable depth of water source | : | Below 20 feet open wells or Tanks. | |
| 12. | Power consumption | : | 1 unit per hour. | |
| 13. | Suitable for the area of | : | 1 to 2 acres | |
| 14. | Application sectors | : | Agriculture,Home gardens and play ground irrigation |
| 1. | Power - HP or kw | : | Single Phase 2 HP or 1.5 kw |
| 2. | Operating voltage | : | Single phase 190 to 240 v AC |
| 3. | Discharge Maximum | : | 380 LPM. |
| 4. | Pressure maximum | : | 2.8 kg/cm2 |
| 5. | Head range | : | 22 to 30 meters |
| 6. | No of 1.25 inch Rain gun runs | : | 2 nos with each 120 feet diameter |
| 7. | No of 3/4" Sprinkler runs | : | 10 nos with each 80 feet diameter |
| 8. | No of 1/2" Mini Sprinkler runs | : | 15 nos with each 50 feet diameter |
| 9. | Best suitable depth of water source | : | Below 20 feet open wells . |
| 10. | Power consumption | : | 1.5 unit per hour. |
| 1. | Power - HP or kw | : | 5 HP or 3.7 kw |
| 2. | Operating voltage | : | Three phase 320 to 475 v AC |
| 3. | Discharge Maximum | : | 450 LPM . |
| 4. | Pressure maximum | : | 2.8 kg/cm2 |
| 5. | Head range | : | 15 to 25 meters |
| 6. | No of 1.25 inch Rain gun runs | : | 2 nos with each 120 feet diameter |
| 7. | No of 1/4" Sprinkler runs | : | 12 nos with each 80 feet diameter |
| 8. | Time to wet 3 inches depth | : | 1.5 hours |
| 9. | Best suitable depth of water source | : | Below 40 feet open wells . |
| 10. | Power consumption | : | 4 unit per hour. |
Normally cheap and best method of Rain gun irrigation is runs by electric power only. But in case electric power not available means you can use diesel or kerosene engine operated small pumps to cover 75 to 100 feet radius. Due to mechanical power the efficiency is less than electric operation. So you must try from below 30 feet depth water sources like ground level water pond, tanks or 30 feet open wells for pumping the water. Here you can get minimum of 2.5 to 3 kg/cm2 pressure in rain guns.
For engine operated system you must select mini sprinklers in multiple nos or basic model rain gun as single piece to get better irrigation and uniform wetting.For 3.5 hp kerosene engine you can connect 20 nos of mini sprinklers or 50 nos of micro sprinklers or only one no of mini rain gun with 60 feet radius coverage.
When compared to electric power total operating cost is more. But in remote areas this is the only option for temporary sprinkling irrigation for one or two time during drought seasons to save the crop from failure by water shortage.
| 1. | Power - HP or kw | : | 3.5 HP or 2.6 kw |
| 2. | Discharge Maximum | : | 250 LPM . |
| 3. | Pressure maximum | : | 2.2 kg/cm2 @ 3500 RPM |
| 4. | Head range | : | 15 to 22 meters |
| 5. | No of 1.25 inch Rain gun runs | : | 1 nos with each 120 feet diameter |
| 6. | No of 1/4" Sprinkler runs | : | 6 nos with each 80 feet diameter |
| 7. | Time to wet 3 inches depth | : | 1.5 hours |
| 8. | Best suitable depth of water source | : | Ground level water tanks. |
| 9. | Fuel Consumption | : | Kerosene 0.75 to 1 Ltrs per hour. |
| 1. | Power - HP or kw | : | 5 HP or 3.7 kw |
| 2. | Discharge Maximum | : | 450 LPM . |
| 3. | Pressure maximum | : | 2.8 kg/cm2 @ 3500 RPM |
| 4. | Head range | : | 15 to 25 meters |
| 5. | No of 1.25 inch Rain gun runs | : | 2 nos with each 120 feet diameter |
| 6. | No of 1/4" Sprinkler runs | : | 10 nos with each 80 feet diameter |
| 7. | Time to wet 3 inches depth | : | 1.5 hours |
| 8. | Best suitable depth of water source | : | Ground level water tanks. |
| 9. | Fuel Consumption | : | Diesel 1 to 1.5 Ltrs per hour. |
