Working Principles - Curtis Dyna-Fog 2790 Manual Del Usaurio

The machine consists of a motor/blower assembly, a nozzle system, a nozzle
housing, a formulation tank and a metering valve. The various components are
identified in diagram below. The blower is a single stage/centrifugal impeller/axial
flow driven by a universal motor operating at a speed of about 20,000 RPM. The
blower moves a large amount of air through the nozzle system consisting of three
individual nozzles, each of which has two sets of directing vanes. One vane set
causes the air to be rotated clockwise and the other causes the air to be rotated
counterclockwise. The intersection action of the circular forces shears the material
being dispensed into small particles. Further, the air rushing by the specially
shaped liquid tubes creates a negative pressure in the liquid tube. This negative
pressure causes the liquid to be drawn from the formulation tank through the control
valve and into the nozzle system where it is pneumatically sheared into aerosol or
mist sized droplets. After break-up, the droplets are driven away from the machine
by the air passing through the nozzle system.
Generally, the size of the output droplets increases with increasing flow rate and
with increasing viscosity.
AIR
FILTER
AIR
INTAKE
FORMULATION
OPTIONAL
FILTER

WORKING PRINCIPLES

FLUID SYSTEMS DIAGRAM
- Page 2 -
NOZZLES
MOTOR
METERING
VALVE
VENTED
TANK
AIR
LIQUID
MIST