Curtis Dyna-Fog MAXI-PRO 4 User manual

DYNA-FOG
MAXI-PRO™ 4
MODEL 2742 SERIES 5 ULV AEROSOL
APPLICATOR
Manufac ured by:
Cur is Dyna-Fog, L d.
17335 U.S. Highway 31 Nor h
PO. Box 297
Wes field, Indiana 46074 USA
www.dynafog.com
INNOVATORS OF SPRAYING AND FOGGING DEVICES
OPERATION, MAINTENANCE AND SPARE PARTS MANUAL
®

Operation, Maintenance and Spare
Parts Manual For:
Dyna-Fog Maxi-Pro 4
Model 2742, Series 5
U V Aerosol Applicator
(Cold Fogger
Manufactured by:
Curtis Dyna-Fog, td.
17335 U.S. Highway 31 North
PO. Box 297
Westfield, Indiana 46074 USA
www.dynafog.com
®
TM

TABLE OF CONTENTS
Page No
MACHINE SPECIFICATION ............................................................. 5
MAJOR COMPONENTS DIAGRAM ................................................. 6
FORWARD....................................................................................... 7
DESCRIPTION................................................................................. 7
WORKING PRINCIPLES ................................................................. 8
FLUID SYSTEMS DIAGRAM ............................................................ 8
ASSEM LY INSTRUCTIONS ........................................................... 10
MACHINE INSTALLATION ............................................................... 12
SAFETY PRECAUTIONS ................................................................. 13
OPERATION.................................................................................... 15
Pre-Spray check list............................................................... 16
Engine Preparation................................................................. 17
Starting the Engine ................................................................ 18
Liquid Flowability measurement............................................. 19
Typical Insecticide Flow Rate ................................................ 21
Particle size tables ................................................................. 22
SYNCROFLOW SECTION ............................................................... 23
MAINTENANCE................................................................................ 25
Maintenance schedule ........................................................... 26
Flushing the System ............................................................... 27
Formulation/Flush Solenoid Valve ......................................... 28
Formulation Filter................................................................... 29
lower Filter.................................................................<....... 30
Nozzles.................................................................................. 31
3-way solenoid valve .............................................................. 32
Formulation Pump Calibration ............................................... 33
Flexible Coupling ................................................................< 34
Storage and Shipment........................................................... 37

ELECTRICAL CONTROLS ............................................................... 39
Remote Control ox functions ............................................... 40
Pump Control Assembly ......................................................... 42
Pump Control, outside diagram ............................................. 43
Power Supply Module ............................................................ 44
Motor Control Module ............................................................ 45
Tachometer Decode Module .................................................. 47
Speed Decode Module .......................................................... 49
Optical Sensor Interface ........................................................ 51
4 MPH Switch ........................................................................ 52
MACHINE ELECTRICAL SCHEMATICS
Starter Solenoid ..................................................................... 53
Engine Wiring Diagram .......................................................... 53
Remote Control ox Schematic ............................................. 54
Pump and Control Schematic ................................................ 55
Power Regulator Schematic <<<<<<<<<<<<<< 56
Motor Control Schematic ........................................................ 57
Tachometer Decode Schematic ............................................. 58
Speed Decode Schematic ...................................................... 59
4 MPH Switch ........................................................................ 60
ypassing the pressure switch .............................................. 61
TROU LESHOOTING...................................................................... 62
PARTS IDENTIFICATION
Machine Diagram (Exploded View)........................................ 65
Engine Assembly 18 HP Vanguard....................................... 67
Solenoid/ racket Assembly (Auto choke)<<<<<<<< 68
lower Assembly.................................................................... 69
Nozzle/ oom Assembly......................................................... 70
3-Way Valve Assembly .......................................................... 71
Flexible Coupling Assembly ................................................... 72
Fuel Tank Assembly .............................................................. 73
Formulation Tank Assembly ................................................... 74
Flush tank Assembly .............................................................. 75
3-Way Valve Assembly (Formulation/Flush).......................... 76
Steel & Plastic gripper Nuts ................................................... 77
Formulation Control System ................................................... 78
Machine Plumbing Diagram ................................................... 80
Automatic Engine Idleback (optional)<<<<<<<<<<. 81
lower Performance Curve <<<<<<<<<<<<<<. 82
ENGINE OWNER MANUAL ....................................................... See Attached Manual
LOWER SERVICE & REPAIR .................................................. See Attached Manual

MACHINE SPECIFICATIONS
FOR MAXI PRO

 4, MODEL 2742 SERIES 5
TYPE: Aerosol Generator, Non-Thermal, Insecticide,
Ultra-Low-Volume, (ULV
ENGINE: Briggs & Stratton, 4-cycle, 2 cylinders, gasoline engine, 18
HP, equipped with electric starter and alternator.
Gasoline consumption: 1.6 U.S. gal./hr. (6.05 Lt./hr.
Operating Speed: 2,500 RPM
BLOWER: Positive displacement. Straight lobe, rotary type, direct drive.
Output Air Pressure: Rated at 0-10 PSI (.68 Bar
Output Air Flow: Rated at 0-400 CFM (11.2 m³/min.
FORMULATION PUMP: 3-Types Available:
1 High volume, corrosion resistant diaphram pump.
2 Stainless steel gear pump with optional radar syncroflow control.
3 Fmi ceramic piston pump with carbon cylinder with optional
syncroflow control.
NOZZLE SYSTEM: Boom mounted, cluster type with 180° horizontal adjustment
(azimuth and 180° vertical adjustment (elevation , 4 nozzles.
TANKS: Corrosion resistant, high-density Polyethylene.
Formulation: 15 U.S. Gallons (56.7 liters .
Flush: 1 U.S. Gallon (3.78 liters , Optional 1.25 gallons (4.73 liters
Gasoline: 12.2 U.S. gallons (46 Lt , cap with level gage.
PARTICLE SIZE: 5-30 Microns Volume-Median-Diameter (VMD depending on flow
rate and viscosity.
WEIGHT EMPTY: 450 lbs. (204 Kg.
LENGTH: 44 in. (112 cm.
WIDTH: 33 in. (84 cm.
HEIGHT: 32 in. (81 cm.
MOUNTING BASE
FRAME: 39” L x 30” W (97 cm x 76 cm
SHIPPING INFORMATION (CRATED
DIMENSIONS: 46” L x 36” W x 36” H (117 cm. x 99 cm. x 99 cm.
VOLUME: 37 cu.ft. (1.1 cu. Meter
SHIPPING WEIGHT: 495 lbs (225 Kg.
5
5

Maxi-Pro
TM
4
Major Components Diagram
FORMULATION
TANK ASS MBLY
FU L TANK
ASS MBLY
BATT RY
GASOLIN
NGIN
NOZZL BOOM
ASS MBLY
COUPLING
GUARD
NO
ZZL BOOM
PR SSUR GAUG
3
-
WAY VALV
(FORM/FLUSH)
BLOW R
INTAK
AIR FILT R
R MOT CONTROL
CABL ASS MBLY
R MOT
CONTROL
BOX
FORMULATION
PUMP NCLOSUR
FORMULATION
FILT R
FLUSH TANK
ASS MBLY
6

FOREWORD
The application of insecticides is the predominant method by which man attempts to
control the size of insect populations. Due to environmental and economical reasons, it
is desirable to treat a given area with the least amount of insecticide that can be made
to be effective. The most efficient method is to break up the liquids into aerosols and
distribute these fine droplets over the target area. The small droplets stay suspended for
longer periods of time due to their size and are distributed more evenly, remaining
effective longer.
The term ULV is an abbreviation for Ultra-Low-Volume, the technology used to treat
areas with small amounts of chemical in an aerosol form. These chemicals are usually
in a more concentrated state than chemicals used in other methods of application.
For best results, the Dyna-Fog ULV aerosol generator model 2742 should be operated
and maintained in compliance with this manual. Insecticides must be applied in
compliance with their label instructions.
WARNING
Read and thoroughly understand all information, cautions and warnings on the
formulation label which may affect personal safety. Know any dangers of the
solution used and know what to do in case of an accident involving the solution.
Always use the appropriate safety equipment and dress accordingly to the
chemical formulation which is being used.
DESCRIPTION
The Dyna-Fog model 2742 ULV Aerosol Generator is designed to disperse
concentrated formulations at flow rates in the range of 0 to 18 oz./min. (0-540 ml/min)
with droplet sizes less than 20 microns VMD (Volume-Median-Diameter).
This machine is to be vehicle or trailer mounted and is designed to be operated by the
driver of the vehicle using the remote control box.
7

WORKING PRINCIPLES
An 18 Horsepower, electric start, four-cycle gasoline engine with a flexible coupling
on its output shaft is used to drive a positive displacement rotary-blower. The air
entering the blower is first filtered through a large stainless steel filtering element.
The blower supplies air pressure to 4) nozzles. The air pressure is adjustable
between 2-8 PSI 0.14 - 0.54 Bar) By varying the engine speed. The formulation is
delivered to each nozzle by means of a variable speed positive displacement, rotary
gear pump that draws the formulation from the tank, through a filter and 3-way
valve, and into each nozzle. Each of the 4) nozzles has six stationary fins that
create a swirling effect of the air mass as it leaves each nozzle. In the center of this
swirling air mass is a liquid supply spray tube. The spray tube directs the formulation
into the air mass where it is sheared into billions of tiny droplets and dispersed into
the atmosphere.
This unit is equipped with a flushing system that is controlled from the remote
control unit. The flushing liquid is conveyed to the nozzles in the same manner as
the formulation. The system must be flushed after each use.
FLUI SYSTEMS IAGRAM
8

WORKING PRINCIPLES (Continued)
All liquid conveying components such as tubing, fittings, pump, filters, and valves
are made of corrosion resistant materials.
The machine is equipped with a remote control unit that contains the following ;
• Machine ON OFF switch
• Engine remote start switch
• Formulation Flush selector switch
• Five function rotary switch that selects:
1. Low formulation flow rates (English units)
2. High formulation flow rates (English units)
3. Low formulation flow rates (Metric units)
4. High formulation flow rates (Metric units)
5. Fuel level, Optional (Gallons)
• Digital readout of any of the five functions selected
• Spray output ON OFF switch
• Pump flow rate control knob
• Colored L.E.D.'s to designate selected function
REMOTE CONTROL BOX
9

ASSEMBLY INSTRUCTIONS
1) Uncrate the unit and remove all packing materials.
NOTE: It is a good idea to retain the original machine shipping carton
for storage.
2) Place the remote control unit where it will not be damaged while the machine
is being installed.
3) Remove the machine from the shipping skid by removing the three lag screws
that retain the shipping brackets. Keep the brackets for mounting the machine
to your vehicle or trailer bed.
4) Check the lubricating oil level in both the engine and blower. Refer the engine
and blower sections of this manual and to the engine and blower manuals
for the correct filling procedure and add oil if necessary.
5) Activate the dry charge storage battery according to the following instructions:
CHARGING THE BATTERY
DANGER POISON
Batteries produce explosive gases. Keep sparks, flame and cigarettes away ! Ventilate
when charging or using in an enclosed space.
The battery contains Sulfuric Acid, which causes severe burns. If acid contacts eyes,
skin or clothing, flush well with water. For contact with eyes, get immediate medical
attention.
Keep battery and acid away from children and other persons who may not be aware of
dangers involved.
A. Remove battery from its mounting and place on a stable workbench.
B. Remove vent caps from battery. Remove or destroy any sealing device which may
Have been used to close or restrict the vent openings in the vent caps.
C. Fill each cell of the battery to the top of the separators with approved battery
Electrolyte of 1.265 specific gravity.
NOTE: The temperature of the battery and electrolyte at time of filling should be
Be above 60°F (15 °).
10

CAUTION
NEVER FILL BATTERY IN MACHINE AS SPILLS WILL DAMAGE FINISH AND CAUSE
PREMATURE CORROSION AND/OR DAMAGE TO COMPONENTS.
D. Charge 12 volt battery at 3 - 4 amps until the acid temperature is above 80°F
(26 °C), and the hydrometer reading is 1.250 or higher. Acid temperature
must never exceed 125 °F while charging.
NOTE: Both temperature and hydrometer readings must be met.
E. After charging the battery, check acid levels in all cells and fill each cell with
acid to the proper level.
F.Re-install vented caps.
G. Re-install the battery onto the machine in same position as it was before being
H. Connect the RED positive (+) cable to the positive terminal of the battery and
fasten it securely with the hardware provided.
I. Connect the BLACK negative (-) cable to the negative terminal of the battery
and fasten it securely with the hardware provided.
CAUTION
i When installing the battery, connect the negative (-) cable last
to prevent sparking and shorting.
i When disconnecting is required, remove the negative (-) cable
first.
i Reverse polarity can cause damage to the starting and
charging system.
After battery has been initially service, only water should be added to restore the
liquid level in each cell. Further addition of acid will cause battery failure.
7
11

MACHINE INSTALLATION
1. Remove the machine from the skid and lift the machine onto the vehicle with the
discharge end of the machine toward the rear of the vehicle.
2. Pass the remote control unit through an open window and locate it within reach of
the person operating the machine. If permanent vehicle installation is desired, the
remote control cable can be fed through a clearance hole in the vehicle chassis
and then reconnected. When drilling clearance holes, ensure that all sharp edges
are removed and covered to prevent premature wearing of the remote cable. When
routing the cable to the vehicle cab, do not allow the cable to be exposed to an
sharp edges. Avoid sharp bends when routing the cable. Once the cable has been
routed to the cab, reseal all drilled openings to prevent moisture and/or exhaust
gases from entering the cab.
3. Using the (3) hold-down brackets used for mounting the machine to the shipping
skid, securel mount the machine to the bed of the vehicle (see diagram below).
Depending on the t pe of bed surface, it ma be necessar to use additional
mounting hardware to secure the machine.
WARNING
NEVER ATTEMPT TO OPERATE THE MACHINE WITHOUT FIRST VERIFYING THAT IT IS
SECURELY MOUNTED. FAILURE TO DO SO COULD RESULT IN SEVERE INJURY.
12

SAFETY PRECAUTIONS
WARNING
READ AND UNDERSTAND THESE SAFETY
PRECAUTIONS BEFORE OPERATING MACHINE
1.ENGINE AND FUEL; This machine uses gasoline as the fuel for the internal
combustion engine and all precautions commonly applying to this volatile fuel
should be observed. Exercise extreme caution to avoid spilling of gasoline. If
spillage occurs, wipe it off and allow evaporation time before starting the engine.
DO NOT attempt to put fuel in tank while the machine is still running. Avoid
smoking or open flames in area when handling gasoline. Never run the unit
indoors unless exhaust is vented to outside. These fumes contain carbon
monoxide which is colorless and odorless and can be fatal.
CAUTION
DO NOT OPERATE ENGINE WITHOUT MUFFLER.
NOTE: The engine is equipped with a muffler that has a U.S. Forestry Service
approved spark arrester which is required by law in some states.
DO NOT TOUCH HOT MUFFLER, CYLINDERS OR FINS AS CONTACT MAY
CAUSE BURNS.
EXCEPT FOR ADJUSTMENT, DO NOT OPERATE THE ENGINE IF AIR
CLEANER OR COVER DIRECTLY OVER THE CARBURETOR AIR INTAKE
IS REMOVED.
DO NOT RUN THE UNIT IF THE COUPLING GUARD IS REMOVED.
DO NOT TAMPER WITH GOVERNOR SPRINGS, GOVERNOR LINKS OR
OTHER PARTS WHICH MAY INCREASE OR DECREASE THE GOVERNED
ENGINE SPEED.
2.MACHINE DAMAGE: Never operate a machine after it has been damaged.
A damaged machine can be very hazardous.
3. WIND: Spraying during windy conditions is not usually practical because the
formulation will drift out of the intended area. However, under NO
circumstances should spraying into the wind be attempted. This may cause
hazardous accumulations on the machine or carrying vehicle.
13

SAFETY PRECAUTIONS (Continued)
4. SAFETY EQUIPMENT: In addition to any safety equipment that may be
required by the type of formulation which is being used, the following items
should be mandatory for each vehicle which carries this machine during
fogging operations.
a. Fire Extinguisher, chemical-type rated for fuel fires.
b. First Aid it.
c. Eye Wash Solution.
d. Safety Glasses.
e. Container of Oil Dry Compound.
f. Gloves Rated for High Temperature.
g. Respirator Adequate for Formulation being used.
5. CHIL REN: Many spraying operations are performed in residential areas,
commonly at dusk. This presents the operator with the problem of children
who are attracted to the noise and/or mist being created. Children have been
observed running into and riding bicycles through the mist. The possible
hazard lies in the toxic effect of some formulations, the severity of which
depends upon the chemical used, mist density and the length of time of direct
exposure.
IT IS THE OPERATOR'S RESPONSIBILITY TO DISCOURAGE ANYONE
FROM PLAYING IN THE MIST OR BEING NEAR THE MOVING VEHICLE.
6. FORMULATIONS: Ensure that formulations are applied only in strict
compliance with the formulation label as well as local, state and federal
regulations and that these formulations are dispersed only by trained
personnel of public health organizations, mosquito abatement districts, pest
control operators or other qualified personnel.
a. Always comply with any requirements for protective clothing, goggles,
gloves, facial masks or respirators required on the formulation label.
b. Do not exceed the dosage set forth on the registration label of the
insecticide to be used.
c. Always store formulation in its original labeled container.
7. BLOWER PRESSURE: Do not allow to operate with blower pressure above 8
psi, and never under any circumstance exceed 10 psi. For most applications,
a blower pressure (nozzle pressure) of 6-7 psi is satisfactory (see table 2).
14

MACHINE OPERATION
CAUTION
READ THIS COMPLETE OPERATION SECTION AND THE SECTION ON SAFETY
PRECAUTIONS BEFORE STARTING THE MACHINE FOR THE FIRST TIME.
For first time operation, the sections on MACHINE INSTALLATION and MACHINE
OPERATION must be performed before proceeding with this section.
When operating this machine for the first time, move to an uncongested and well-vented
work area away from flammable materials.
WARNING
READ THE SECTION ON SAFETY PRECAUTIONS BEFORE PREPARING TO
DISPENSE FORMULATION.
READ AND THOROUGHLY UNDERSTAND ALL INFORMATION, CAUTIONS AND
WARNINGS ON THE FORMULATION LABEL WHICH MAY AFFECT PERSONAL
SAFETY. KNOW ANY DANGERS OF THE SOLUTION USED AND KNOW WHAT TO
DO IN CASE OF AN ACCIDENT INVOLVING THE SOLUTION.
ALWAYS USE THE APPROPRIATE SAFETY EQUIPMENT AND DRESS
ACCORDING TO THE CHEMICAL FORMULATION WHICH IS BEING USED.
WARNING
i DO NOT USE ANY SUBSTANCES FROM UNMARKED CONTAINERS OR
FROM CONTAINERS WITH OBVIOUSLY ALTERED LABELS.
i READ AND FOLLOW THE INSTRUCTIONS ON THE CHEMICAL
SOLUTION LABEL FOR ULV SPRAYING OF THE SOLUTION .
i DO NOT SPRAY NEAR AN OPEN FLAME OR HOT MATERIALS.
i DO NOT LEAVE THE MACHINE UNATTENDED.
15

PRE-SPRAY CHECK LIST
1. Verify that the remote control box is within easy reach of the operator.
2. Verify that the adjustable nozzle boom is in the correct position as required for
the spraying operation to be accomplished, and that the ring damp which allows
this positioning is tight.
3. Verify that the engine has sufficient fuel and is properly lubricated.
4. Verify that the blower has been serviced.
5. Inspect all hoses for abnormal conditions.
6. Verify that no foreign objects or tools have been left in or about the machine.
7. Verify that the sufficient amount of formulation is in the tank and that the tank
filling cap is tight and it’s air vent hole is not restricted.
8. Verify that the battery is mounted security and cable connections are proper
and tight.
9. Verify that all safety equipment is in place and is in proper working order.
10. Verify that the flow rate control has been calibrated and is dispensing
formulation in accordance with the manufacturers label requirements.
CAUTION
BEFORE PROCEEDING WITH ANY SPRAYING OPERATION, THE OPERATOR
SHOULD BE THOROUGHLY FAMILIAR WITH STARTING AND STOPPING THE
MACHINE AND WITH ALL THE OPERATING^ CONTROLS. IF YOU ARE OPERATING
THE MACHINE FOR THE FIRST TIME, EXERCISE THE MACHINE THROUGH ITS FULL
OPERATIONAL SEQUENCES FROM A POSITION OF FULL VISIBILITY OF THE
MACHINE BEFORE OPERATING THE MACHINE FULLY REMOTE. THIS IS ALSO A
GOOD IDEA FOR EXPERIENCED OPERA TORS WHO MAY BE OPERATING A NEW
MACHINE OR WHO MAY BE REACTIVATING A MACHINE AFTER REPAIRS OR A
PERIOD OF INACTIVITY. REFER TO THE ENGINE MANUAL FOR STARTING AND
STOPPING INSTRUCTIONS.
16

ENGINE PREPARATION
Oil Recommendations
Change and add oil according to chart below. Do not overfill. Use high quality detergent oil
classified "For service SC, SD, SE, SF, SG" as &S "warranty certified" SAE 30 oil, part no.
100005. Use no especial additives with recommended oils.
(*) Air cooled engines run hotter
than automotive engines. Use of
multi-viscosity oils (10W-30,
etc.) Above 40 °F (4°C) will
result in high oil consumption
and possible engine damage.
Check oil level more frequently if
using these types of oil.
(**) SAE 30 oil, if used below 40
°F (4 °C), will result in hard
starting and possible engine
bore damage due to inadequate lubrication. Check oil level before starting engine. Add oil (If
required) as shown below.
Start and run the engine at idle for 30 seconds. Shut engine off. Wait 30 seconds and
check oil level. Add oil to bring level to Full mark on dipstick, if required.
Oil capacity is about 1.5 quarts (1.4 liters) if engine is not equipped with oil filter. Oil
capacity is about 1.75 quarts (1.7 liters) if engine is equipped with oil filter.
Note :Engine is shipped from factory without oil. efore starting the engine, check oil level.
Fuel Recommendations
The engine will operate satisfactorily using any automobile gasoline. Use clean, fresh, lead-
free gasoline with a minimum of 77 octane. (Leaded gasoline may be used if it is
commercially available, and if lead-free is not available). Purchase fuel in quantity that can
be used within 30 days. DO NOT MIX OIL WITH GASOLINE. &S do not recommend
using gasoline which contains alcohol, such a gasohol. If gasoline with alcohol is used, it
must contain less than 10% Ethanol and must be removed from engine during storage. Do
not use gasoline which contains Methanol. Fuel Level : Do not overfill. Allow space in fuel
tank for fuel expansion.
17

STARTING THE ENGINE
1. CHOKE ENGINE: Move engine choke control to position lever in "choke" position
(pulling the control rod). NOTE: This should fully dose choke on carburetor.
Note: The anual choke is provided for cold starting of the engine. Once the
engine has been allowed to war -up, choking the engine should not be needed
for restarting.
2. TURN "ON" THE MACHINE "ON/OFF" SWITCH: Position Machine "ON/OFF"
switch on the re ote control box to "ON" position. Also verify that the "OUTPUT"
switch on the re ote control box is in the "OFF" position.
3. TURN "ON" (RUN) THE "RUN/STOP" SWITCH:
Position kill switch on engine to "ON". This switch is located next to the starter
button.
4. START ENGINE: Activate the spring-loaded starter switch on the engine or
activate the toggle switch on the re ote control box to the start position. NOTE:
To prevent overheating the engine starter otor, do not activate the otor longer
than 15 seconds at a ti e.
5. SET ENGINE SPEED: Allow the engine to war -up and gradually ove the choke
lever to the "unchoked" position (pushing the control rod).
Adjust the engine Speed control to achieve the desired Boo Pressure. Pulling the
control rod increase the engine speed (increase the boo pressure).
The engine speed control is located dose to the cap of the oil level indicator
(dipstick).
CHOKE CONTROL
ON/OFF SWITCH
SPEED CONTROL
18

MEASURING LIQUID FLOWABILITY (VISCOSITY)
In order to achieve consistent results in generating aerosols with a volume-median-
diameter (VMD) in the sub 20 micron range, several variables must be kept under
control at the same time. The ability of an aerosol generator to consistently break up
a liquid into appropriate sized droplets depends on (3) key elements:
1.The available energy flow (air flow) through the nozzle is governed by the
blower speed. As the air mass and its velocity through the nozzle decreases,
the droplet size (VMD) will increase assuming that the liquids viscosity and
flow rate remains constant.
2. The flow rate of the liquid governed by the speed of the liquid pump.
3. The viscosity of the liquid.
Various liquids have different viscosities. Viscosity is defined as a fluids resistance
to flow commonly measured in units of a centipoise (CP). Generally, the thicker the
liquid, the greater the viscosity and the higher the CP number. Examples of some
liquid viscosities are:
LIQUID VISCOSITY (CP)
WATER 1
DIBROM 3-4
DOWMFC 3-4
PYRETHRIN, RESMETHRIN 6-7
DURSBAN 1.5 ULV 12-14
TECHNICAL MALATHION 28
By measuring the flowability of a liquid, adjusting the engine speed to produce the
desired nozzle boom pressure, and by setting the flow rate on the digital readout
remote control box, accurate particle size can be achieved.
19

To measure the flowability (viscosity) of your formulation:
1. Place a sample of the formulation liquid to be dispensed in the relative
flowability meter provided with the machine such that the liquid level is above
the top line.
2. Hold the meter vertical and allow the liquid to flow through the brass orifice at
the outlet end of the meter into an appropriate container.
3. Using a stopwatch or a watch with a sweep second hand, determine the
flowability time in seconds that it ta es for the liquid level to fall from the top line
to the bottom line.
Once the flowability of the liquid has been measured, tables 1 and 2 can be used as
an approximate guide for setting the pump flow rate and nozzle boom pressure for
your spray application.
NOTE: Periodically calibrate the flowability meter using plain water. Water should
flow through the orifice such that the time between the top line and the bottom line
is 32 + 2 seconds.
20