Rotator nozzles more uniform than spray nozzles on center….pdfVIP

Rotator nozzles more uniform than spray nozzles on center-pivot sprinklers Blaine R. Hanson o Steve B. Orloff In a comparison of Rotator and growers in this area is the capital cost of horizontal spray pattern with smooth spray sprinklers on center-pivot the machines compared to other sprin- deflector plates, or into multiple hori- sprinkler machines, uniformity of kler- and surface-irrigation systems. zontaljets of water with serrated de- applied water was higher for the Early center-pivot machines used flector plates. The primary advantage Rotator sprinklers. Under wind impact sprinklers mounted on the top of spray nozzles is the low operating conditions, uniformity increased of the lateral with operating pressures pressure of 10to 20 psi. Uniformity of for the spray sprinklers and de- of 60 to 80 psi. High uniformities of these nozzles may be less than that of creased for the Rotator sprinklers. applied water were possible with impact sprinklers, based on evalua- Modifications to the sprinkler these sprinklers because of the large tions of both types of sprinklers in wetted diameter, the rotation of the Northern California. spacing are recommended when impact sprinklers and the continuous- A new sprinkler, called the Rotator, using the Rotator sprinklers. move behavior of the machine. Spray has been developed by the Nelson Irri- sprinklers were later introduced. gation Company. This sprinkler de- Center-pivot sprinkler machines are These sprinklers, which consist of a sign is similar to the spray sprinkler frequently used in Northern California nozzle and a deflector plate, are