Replacing Your Spray Nozzle
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Transcript of Replacing Your Spray Nozzle
Replacing Your Spray Nozzle
Biological and Agricultural Engineering
Robert E. Wolf Extension Specialist Application
Technology
Productivity
Efficacy
Off-site protection
The applicationtriangle
Powered Boom Sprayers:
Sprayer Components:• Tanks (contamination issues) • Pump, Strainers, Agitation• Pressure gauge• Hoses, Flow control assemblies• Electronics: monitors-
computers- controllers (GPS/GIS)
• Distribution system• Nozzles!!!!!!!!!
Nozzle Technology:• Nozzles designed to reduce drift• Improved drop size control• Emphasis on ‘Spray Quality’
Nozzles Replacement:
•Replacing worn spray nozzles protects against the danger of a chemical misapplication.
•A combination of calibration and visual observation can be used to determine whether nozzles need to be replaced. –Increased flow rate–Poor patterns
Nozzle Replacement:
• Influenced by:– Nozzle material– Sprayed solution– Pressure used– Cost of application error vs
nozzle replacement cost
MATERIALS AND WEAR
0 2 4 6 8 10 12 14 16
Brass
Zytel
Stainless
Kematal
Hard Stainless
Thermoplastic
11.4
7.5
6.1
2.1
1.2
0.4
Percent increase in nozzle flow rateFlat-fan spray nozzles after 40 hour test
Nozzles are important because:
• Control the amount – GPA.• Determine uniformity of
application.
• Affects the coverage.• Influences the drift potential.
Where do you start?
• Calibration• Pattern quality
Calibration!!!!
Ensuring that the spray output is what it is supposed to be!
Calibration includes:
• Calculating the amount of product needed.• Mixing properly and safely.• Adjusting the equipment to deliver the
desired rate uniformly.• Determining effective swath/overlap.• Checking accuracy during operation.• Detecting and correcting errors.• On a regular basis.
Electronics/Rate Controllers:
• What is the purpose?• How does your system
work when speed changes?
• Is it pressure based? • What is the effect of
going slower?• What is the effect of
going faster?
Rate Controller systems include….• Speed sensor• Servo-valve/flow
meter• Calculation• Adjustment on-the-go
Electronic Control Systems:Electronic Control Systems:
Control the Amount applied:
Nozzle Flow Rate is affected by:
• Orifice size• Pressure• Solution
characteristics
Rated Pressure =40 psi for most nozzle types10 psi for turbo flood nozzles
Nomenclature:
Stainless Steel Insert Orifice
Trade Name
Fan angle and flow rate-orifice size
Extended Range
VisiFlo Color Coding
(S,H,P,K,SS)
Typical nozzle numbering system:Extended-rangeflat-fan
XR 11004 XR Extended-range
110 110 degree fan angle
04 0.4 GPM @ 40 psi
Even flat-fan –(Band applications)
8002E E Even spray pattern
80 80 degree fan angle
02 0.2 GPM @ 40 psi
Turbo flood – Turf Turf flood(small capacity)
TF-4TTJ- 04
TF-TTJ Turbo Turf Flood
4 .4 GPM @ 10 psi.4 GPM @ 40 psi
Turbo flood –(Floater capacity)
QCTF - 40 QCTF Quick attach turbo flood
40 4.0 GPM @ 10 psi
Calculations
GPA=
5940
#$!@&%!#$!@&%!
Calibration/Nozzle Selection:
• What is the first step?• Use label to select the
– application volume– product rate
• Choose an appropriate travel speed• Effective width of application
– nozzle spacing• Calculate GPM – Flow rate per nozzle• Select the correct size of nozzle!
Calculations
GPA=
5940
Ok, now I remember!Ok, now I
remember!
Flow Rate Equation:
GPMGPA x MPH x W
5940
Equation # 2
• Calculates for amount of flow from one nozzle
• Represents the size of nozzle to put on the sprayer
• Calculates for amount of flow from one nozzle
• Represents the size of nozzle to put on the sprayer
GPM Example Solution:
GPMGPA x MPH x W
5940
5940
20x3.5x60GPM
Answer.71
• Calculate GPM (formula)• Look under GPM column• Match to pressure-psi• Choose the size needed• Operate at given
pressure and speed used in formula to achieve GPA
Selecting the proper nozzle….
.71
Checking for accuracy!!!
MEASURE SPEED
Speed(MPH)Distance(ft) x 60
Time(seconds) x 88
(1 MPH = 88 Feet traveled in 60 seconds)
Measure the ground speed in an area similar to the conditions of the area to be sprayed!
Set up for Uniformity:
Goal is to put the material on evenly from nozzle to nozzle, end of boom to end of boom, and across the entire area.
20-inch spacing requires 17-19” above target for 50-60% overlap. Nozzle mount angle?
Replacement decision:Pattern quality
Pattern Quality
The benefits:
• Replacing worn nozzles protects against possible chemical misapplication
• Combining calibration and visual observation for best decisions
• Must be done on a regualar basis• Can be done ahead of time to prevent
wasting valuable time• Change when flows and patterns are
not up to standards.
Nozzles, tools and information:
• Spraying Systems – TeeJet (nozzles and calibration tools)
• http://www.teejet.com/ms/teejet/
• Greenleaf Technologies (nozzles and calibration tools)
• http://www.turbodrop.com/
• Hypro Pumps (nozzles, fittings, ect.)• http://www.hypropumps.com/
• Redball LLC (pattern check device)• http://www.redballproducts.com/
US Open - 2003