Variable Rate Nozzles

By: Kyle Dollins

What Can VRT Be Used For?

• Change Rate every 10 Foot

• Low Speed• Same Rate For

Entire Boom

• Multiple Pumps• Multiple Valves

Ramp Strips

J2 Ramper

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?