Pelsis CURTIS DYNA-FOG HURRICANE ES HESEU, User Manual, Page: 7 / 10

4.0 Principles of Operation - Hurricane ES
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This machine consists of a motor/blower assembly, high voltage power supply, charging ring and electrode, blower
housing, a nozzle, formulation tank and metering valve.
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The blower is a two-stage centrifugal compressor driven by a universal motor operating at a speed of 20,000 rpm.
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The blower moves a large amount of air through the nozzle system.
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The nozzle has six (6) stationary fins, which direct the air to create a swirling effect of the air mass as it leaves the nozzle.
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In the centre of this exiting swirling air, a liquid supply spout tube injects formulation.
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The liquid is delivered to the nozzle by a negative pressure at the nozzle caused by the exiting air mass.
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The flow rate is controlled by a one turn precision metering valve located at the formulation tank.
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Generally, the sizes of the output droplets increase with increasing flow rates and with increasing viscosity of the liquid
being dispensed.
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After the nozzles shear the formulation into billions of droplets, the droplets are dispersed into the atmosphere. As the
droplets exit the nozzles they pass through an “electrostatic ion field”.
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This field is created using the combination of a high voltage power supply, an emitting electrode and charging ring (Collector).
The result is billions of electrostatically charged droplets that gravitate to neutral objects to form a uniform coverage.
5.0 Flow Rates, Droplet Sizes and Applications
Liquid flow rate of the Hurricane ES is created by the suction caused by the design of the 3 nozzles. The Flow rate
is regulated by adjusting the metering valve. The liquid flow rate can be increased by rotating the metering valve
anticlockwise and decreased by rotating it clockwise.
There are three flow indicator marks on the side of the tank that designate position 1, position 2 and position 3. All flow rate
information is based on using water with a temperature of 21 C. Increasing the viscosity will decrease flow rate and can
increase droplet size.
Refer to the table below for approximate flow rates and droplet sizes at the various valve settings. Droplet sizes are shown
in microns VMD (Volume Median Diameter). The VMD is an industry standard and represents the “middle point” of the spray
droplet spectrum of the liquid being applied.
Metering Valve Setting
Hurricane ES Flow Rate And Droplet Size
Flow Rate Droplet Size
mL/Min Microns - Volume Median Diameter
#1 60 10 - 20 MICRONS
#2 90 20 - 30 MICRONS
#3 120 30 - 50 MICRONS
IMPORTANT
To maximise electrostatic efficiency, only use Water-Based formulations with the Hurricane ES.
Warning: To prevent damage to sensitive objects or surfaces such as wood finishes, carpeting, and upholstery.
Do not over apply the formulation being sprayed. If in doubt, always perform a spray test on a small area to check
the effects prior to doing the actual spray treatment.
5.1 Insect Control
Depending on the target insect, droplets are generated in the 10-30 Micron range so that even with some evaporation and
settling time, the droplets remain in the correct range for optimal air born suspension and insect impaction. In dry climates
evaporation will tend to cause droplets to “shrink”. Therefore, it may be necessary to increase flow rate to get adequate
coverage. The smaller the droplet size the greater the number of droplets that are created. For example: If 1 millilitre of spray
is dispersed as 20 Micron droplets, there will be 239 million droplets produced. For the same spray mixture using 100 micron
droplets, only 1.91 million will be produced. The large quantity of droplets greatly increases the chances of contact being
made with the insect.