Principles Of Operation; Fluids System Diagram - Curtis Dyna-Fog CyClone 2730 Operation And Maintenance Manual

PRINCIPLES OF OPERATION

The machine consists of a motor/blower assembly, blower housing, a nozzle, formulation tank, tank
neck filter, metering valve, check valve and shutoff valve (solenoid or manual, depending of the
model). The various components are identified in the fluid systems diagram and major components
diagram. The blower is a two-stage centrifugal compressor driven by a universal motor operating at a
speed of 20,000 rpm. The blower moves a large amount of air through the nozzle system. The
flexible hose is located between the nozzle and the blower housing to allow easy orientation of the
nozzle to direct the spray into hard to reach areas. 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. In the center of this exiting
swirling air, a liquid supply spout tube injects formulation. The formulation is sheared into tiny aerosol
droplets and dispersed into the atmosphere. The liquid is delivered to the liquid spout by a
combination of positive and negative pressures. A negative pressure is generated in the nozzle by
the exiting air mass and a positive pressure is generated inside the blower housing and sampled to
pressurize the formulation tank. The positive pressure minimizes the effect of the variation of the flow
rate due to the difference in the static head of the liquid when the nozzle is at higher or lower position.
The rate of flow is controlled by a metering valve located at the left side of the tank. Generally, the
sizes of the output droplets increase with increasing flow rates and with increasing viscosity of the
liquid being dispensed. The check valve allows the airflow from the blower housing to the tank, and
avoids any return of pressurized air/vapor or liquid to the blower housing. The vented tank cap in
combination with the air coming from the blower housing, allows a medium positive pressure inside
the formulation tank when the machine is in operation, and equalizes the tank pressure to the
atmospheric pressure in a relatively short period of time, when the machine is turned off.
CYCLONE™ FLUID SYSTEM DIAGRAM
Curtis Dyna-Fog, Ltd. 2008 6