Atomizing Fine Spray Nozzles
The JJB nozzle system uses the energy in
compressed air to produce highly atomized sprays at low
flow rates. There are many interhangeable components
that can be assembled to achieve a variety of spraying options.
Spray Set-Ups. JJB nozzles
produce eight distinctly different types of sprays, depending
on which interchangeable air and fluid caps are selected.
The spray type and flow rate are determined by the "set-up"
- a specific combination of one air cap and one fluid
Internal Mix Set-Ups. Liquid
and air streams meet within the nozzle and are mixed together
and expelled through the same orifice(s). This internal
mixing means the streams are not independent; a change in
air flow will affect the liquid flow. This makes precise
metering of the liquid more difficult than with an
External Mix Set-Up. Internal mix Set-Ups are able
to produce the finest atomization of any of the JJB set-ups,
but they are generally not suitable for use with liquids
which have a viscosity that is above 200 centipoise.
External Mix Set-Ups. The
air and liquid streams exit the nozzle independently and
are combined and mixed outside of the nozzle. Because there
is no connection between the air and liquid lines within
the nozzle, the air and liquid flow rates can be controlled
independently, allowing precise metering of the liquid.
The atomization can be controlled by adjusting the air flow
rate - more air produces finer atomization. In most cases
these set-ups do not atomize as finely as Internal Mix Set-Ups.
External Mix Set-Ups may be sued with liquids having a viscosity
above 200 centipoise and for abrasive suspensions.
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