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Dimensional control of aerosol spray nozzle0 pages
Example of SOLEX application - n°1
Dimensional control of aerosol spray nozzle
Objective
Provide a reliable, repeatable and rapid measuring
method for the diameter and geometry of aerosol
spray nozzles (actuator).
Main components
- Solex pneumatic flowmeter
- Adaptor between flowmeter and actuator
Advantages
SOLEX pneumatic flowmeters can give a rapid
measurement (in less than 10 seconds) with an
accuracy of better than 5% of the orifice section.
Figure 1 – Aerosol spray principle
(Source: Wikipedia)
Application
Modern aerosols have three major parts:
A metal container with gas under pressure and the fluid to be vaporised
A valve
A propellant stopper or actuator
The user pushes on the actuator to open the valve and this causes fluid to be ejected
from the container.
The diameter and geometry of the exiting orifice in the actuator are the determining
elements for creating the characteristics of the aerosol spray cloud. These elements
include length, angle, and droplet mean size and distribution patterns.
From the manufacturing point of view, it is essential to have a reliable, repeatable and
quick dimensional checking method. This is provided by SOLEX pneumatic flowmeters.
Their principle rests on taking a direct reading of the fall or rise in pressure following any
variation in a flow of air through an orifice. The Solex flowmeter here measures the
pressure differential linked to the exit flow of the actuator under test, attached to the
flowmeter output by an adaptor. The value measured is compared to that from "good"
and "bad" standardised nozzles.
www.solex-metrology.com
solex@kep-technologies.com
