© irrigation association designing for chemigation equipment

© Irrigation Association

Designing for Chemigation Equipment

Seasonal N Uptake -%-

May| June| July| August| Sept|April0

25

50

75

100

Nit

rogen

Up

take

- %

of

Tota

l

IncrementalAdditions of

Nutrients

70-75%

Benefits of chemigation

Problem #1

• Irrigation pump shuts down• Injection pump continues to run

Problem #2Unexpected shut down of

irrigation system

Problem #3Injection line check valve

failure

© Irrigation Association

Chemical Injection Equipment

Chemigation Injection Installation

© Irrigation Association

Understanding the Types of Components

• Backflow prevention

• Injection system

• Corrosion and precipitates

© Irrigation Association

Commercial Chemigation Valve

© Irrigation Association

Check Valve Cut-Away

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Packaged Venturi System

© Irrigation Association

© Irrigation Association

Understanding the Types of Components,

cont.

• Storage

• Valves and fittings

• Sensors and controls

© Irrigation Association

Spill Containment

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Chemical Overflow Due to Injector Check Valve

Failure

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Understanding the Importance of

Uniformity

• The impact of end guns in

unregulated systems

• The impact of intermittent

end

guns and corner systems

© Irrigation Association

Coordinating Application Dosage and Pivot Speed

© Irrigation Association

Understanding Regulatory and Safety

Requirements

System hydraulics change with

intermittent end gun