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Variable Rate Nozzles

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posted:
11/4/2011
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Variable Rate Nozzles







By: Kyle Dollins

What Can VRT Be Used For?

Ramp Strips

• Change Rate

every 10 Foot

• Low Speed

J2 Ramper

• Same Rate For

Entire Boom



• Multiple Pumps

• Multiple Valves





Rendal Ramper

Change in Ground Speed

• Slow Down For Rough Spot

• Change Rate For Entire Boom



• Hydraulic Driven Pump

• Electric Driven Pumps

• Solenoid Valves

Change in Recommended Rate

• Green Seeker

• Aerial Maps

• Management Zones

Problems With VRT

• Speed of Change

– 15 mph = 22 ft/sec

– To Treat By Foot

• Rate Must Change in 0.045 seconds

• Nozzle Speed Limits Resolution

• Orifice Flow

– To Double Flow

– Pressure Must Be Quadrupled

Types of Variable Rate

• Change rate of Entire Boom

– Pressure Change

– Stepped Pumps

• Change Rate of Individual Nozzles

– Electronic Controlled Sprayer Nozzles

VariTaget Nozzle

• Spray Speeds 2-20 mph

• 100 psi Max Pressure

• 5 to 40 gpa

• $50 Nozzle

• Adjusted by electronic flow

rate controller

Turbo Drop Nozzle

• $30 Per Nozzle

• 20-120 psi

• 0.07 – 1.73 gpm

• Adjusted by

electronic flow

rate controller

Electric Solenoids

• Three solenoids per Sensor

– 1X

– 2X

– 4X

• Changes rate in 0.1 seconds

• Most Expensive

Questions?



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