Curtis Dyna-Fog TWISTER XL 3 3950, Инструкция по установке, эксплуатации и техническому обслуживанию

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LINE NO. 2
C
U
R
T
IS
D
Y
N
A
-F
O
G
L
td
.
(FLOWABILITY TIME)
LINE NO. 1 TO LINE NO. 2
FLUID TO DRAIN FROM
COUNT SECONDS IT TAKES
LINE N0. 1
Measuring Liquid Flowability (Viscosity)
In order to achieve consistent results in generating aerosols with a mass median
diameter (MMD) 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 (MMD) will increase assuming that the liquids viscosity and flow rate
remains constant.
2. The flow rate of the liquid governed by the diameter of the flow control orifice.
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 centipoises (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
Dow MFC 3-4
Pyrethrin, Resmethrin 6-7
Dursban 1.5 ULV 12-14
Technical Malathion 28
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 takes
for the liquid level to fall from the top line
to the bottom line.
Flowability
Test Meter