HOT
WATT introduces tubular heating elements having tube diameter 10.5 mm instead
of 8.2 mm diameter conventional heater. This results in increased surface area
and lower watt density, which increases the life of the heater. A conventional
tubular heater of 8.2 mm tube diameter will have a watt density of 21 watts per
sq.inch where as HOT WATT heavy duty heater of 10.5 mm diameter will have a watt
density of 16 watts per sq.inch i.e. there is a 20 % reduction in watt density.
Also these heaters if required can give more wattages than conventional heater
of the same length. For example a 24" "U" shaped conventional heater
is of 1000 watts where as HOT WATT heavy duty heater can give 1200 watts in the
same length without compromising on any parameter.
CONSTRUCTION:-
HOT WATT Tubular heater consists of a helical Nickel Chromium resistance coil
with a cold terminal attached to each end, precisely centered and uniformly stretched
within a heavy gauge metal pipe. It is then filled with high purity Magnesium
Oxide insulation. This assembly is then swaged, reducing the diameter of the tube
and compacting insulation to insure rapid heat transfer and hold the coil in its
position. The sheath materials used are SS 304, SS 316 Incoloy etc as the case
may be.
