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 Maintaining
Efficiency: Measures
to counter clogging
Foreign matter can clog a nozzle's
internal mechanism or orifice; incidence
of clogging varies according to
the type and characteristics of
the liquid being sprayed. Understandably,
the performance of a clogged nozzle
degrades.
The illustration below shows clogging
in the chamber and around the orifice
of a nozzle.
Although the following measures
can be taken to minimize the likelihood
of clogging, a nozzle manufacturer's
advice should be sought when choosing
a nozzle that will be required to
spray liquids containing impurities
or foreign matter.
- Select a
nozzle that delivers a given flow
rate at low pressure, such nozzles
have a relatively bigger orifice
diameter (or free passage diameter).
- Some nozzles
that deliver a small quantity
of liquid have built-in filters.
- Nozzles
that have no internal components
are effective for avoiding clogging.
- If very
small quantities of liquid are
to be sprayed, nozzles that spray
liquid with gas have bigger orifice
diameters than nozzles that spray
liquids only.
- Eroded internal
surfaces of a nozzle will become
rough, which can trigger an accumulation
of foreign matter. In such cases,
it is wise to choose a nozzle
made of a material that is resistant
to erosion.
- A fundamental
measure to counter clogging is
to filter out any foreign matter
from the liquid to be sprayed
in advance.
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Nozzle Network Co., Ltd.
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