10
RTD-Style
Hot Melt Hose
2. Description
Nordson
RTD-style hoses
provide
superior
temperature control, reliability,
and improved safety. Thermalaccuracy is
improved through
the
use
of
area-sensing
rather than
point-sensing
devices. Area sensing
provides
a
truer indication
of hose temperature by measuring
temperature over a
larger
area. Unlike
point
sensing,
which can
produce
a
false reading
when
affected by
hot
or
cold
spots, area sensing averages temperatures
to
provide
a
reliable reading over
a
wide
range of operating conditions.
Nordson RTD-
(resistance
temperature detector)style automatic
gun
and
handgun hoses may be used only to transport hot
melt adhesives and
other
thermoplastic materials to an appropriate dispensing
point.
RTD-style
hoses are
precision
wound
and
calibrated
prior
to assembly,
ensuring that resistance and controlvalues match
and eliminating the
need for temperature control calibration. The RTD
precision
combined
with
proportional
temperature controls eliminate
under- and
over-temperature conditions. These features
offer more consistent
application rates and improved
pattern
control in
high-volume
production
situations.
A
low watt-density heating element reduces
hot spot
potential.
The
element
is spirally wound around the core for increased flexibility.
Closely
spaced wraps
ensure efficient and uniform heat transfer to the hot melt
material for
fast startup and consistent flow rates. Three layers of
high-temperature
felt insulation increase thermal efficiency, decrease
heat loss, and reduce operating costs.
lntended
Use
RT
D
Tem
pe
ratu re Sen
s
i n
g
Uniform Heating
Manual 45-21 108232E
lssued 1/00
@
2000 Nordson Corporation
All rights resswed
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