End gun systems are mainly used to expand the irrigation area, especially by installing end guns at the end of cantilevers to cover the four corners of square fields and avoid missed spraying. Choosing the right end gun system can improve the spraying uniformity of the irrigation area and ensure consistent irrigation effects.
Key Selection Points:
1. Field Shape and Dead Corner Area
Center pivot sprinklers irrigate in a circular area, leaving the four corners of square fields uncovered (with a missed irrigation rate of about 20%). Calculate the area of dead corners and select an end gun with a matching range. For example, the SR75 sprinkler has a working pressure of 2.5–6 kg/cm², a range of 20–43.5 m, and a flow rate of 6.8–36.3 m³/h. The effective coverage of the end gun is 75% of its range, so ensure the coverage radius is ≥ the farthest distance of the dead corner.
2. Crop Water Needs
High-water-consuming crops (like vegetables) require end guns with large flow rates (≥170 m³/h), while low-water-consuming crops can use medium or small flow sprinklers to avoid water waste.
3. Power and Pipeline Matching
The pressure of the booster pump must be ≥ the rated working pressure of the sprinkler, and verify the bearing capacity of the main pipeline to prevent bursts. The water pipe diameter should be ≥ 6 inches to ensure stable water pressure at the end.
4. Automation Integration
The tail gun’s start/stop should link with the main sprinkler, and remote switching and timed irrigation can be achieved via a smart controller.
5. Material and Durability
The material of the end gun system affects its durability and maintenance needs. For example, the SR75 sprinkler is made of copper or stainless steel, with a sealed bearing and integrated gun valve structure, reducing maintenance and enhancing durability.
6. Drive Mode
Different drive modes affect the sprinkler’s operation convenience and efficiency. The SR75 sprinkler uses a vertical swing arm drive mode, featuring stable rotation speed and pressure resistance.
7. Adaptability and Flexibility
Choose sprinklers that can adapt to different elevation angles and nozzle diameters for more flexibility. The SR75 sprinkler offers elevation angles of 18°, 21°, 24°, 27°, and 43°, and nozzle diameters can be adjusted as needed.
