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Class Objectives
• You will be able to design a center pivot system by the end of class
• You will understand the proper steps and techniques for designing pivots for high efficiency
Agenda - day one
• Introductions and class overview• Basic pivot concepts• Site inventory and analysis• Pivot hydraulics
Agenda - day two
• More pivot hydraulics• Nozzling the pivot• Pumps and pivots• Pivots and chemigation• Refining and adjusting your design
Other class info
• Ask lots of questions • Breaks will be frequent but short -
please!• There will be coffee in the a.m. and
soft drinks in the p.m. • Lunch on your own• We will be doing lots of practice
sessions and group work
Important!
• Please turn off your pagers and cell phones
• You will need a calculator• You will need a pencil or pen
© Irrigation Association
Irrigation, Sixth Edition
Over 1500 years combined knowledge and experience summarized in 1100 pages
Member price $134.00
Non-member price $179.00
IA Bookstore
Order online www.irrigation.org
Understand and Identify Center Pivot
Components
• Drive system• Guidance system• The pivot• Nozzle types and configurations
Patented by Frank Zybach in eastern Colorado in July, 1952
Business arrangement between Zybach and A.W. Towbridge began in 1953 to manufacture pivots in Columbus, NE
Manufacturing rights sold to Valley Mfg. In 1954
Over 100,000 now in operation
Back to the Beginning
Center Pivot Manufacturers
• Reinke• T & L• Valley• ZimmaticMay also deal with Olson,
Gifford-Hill, Lockwood, Pierce, Hygromatic, Raincat, and others.
Making Center Pivots Work Properly
• Minimize run-off• Maximize uniformity• Minimize energy costs• Where pivots don’t fit
Pivot Height
• Four Profiles– Low profile 5.1 - 7.2’ depends on pipe
size
– Standard Profile 8.6 - 10.7’– High profile 11.9 - 14.0’– Ultra high profile 15’ +