heating elements, the most versatile of all types, are used for practically
the entire range of electric resistance heating applications. A cut-a-way
view showing the components of the elements GLO-QUARTZ®
manufactures is shown here.
metal sheath material and the proper size resistance wire for the heating
element are carefully chosen and verified by computer calculations to
insure the longest service life possible.
The nickel/chromium resistor wire is then fusion welded to a terminal
pin to assure a positive connection. It is centered in the metal sheath
and insulated with high quality magnesium oxide, (MgO). The MgO is tightly
compacted around the coil and acts as an electrical insulator. The material
rapidly conducts the heat from the coiled resistor to the metal sheath
and puts the heat where it is required.
Chromium Resistance Wire
80% nickel, 20% chromium alloy resistance wire is the heart of the tubular
element. This wire must meet strict GLO-QUARTZ®
and internationally recognized standards.
Magnesium oxide insulation is carefully selected to give the best transfer
of heat from resistance wire to element sheath. This allows the resistor
wire to operate at the lowest possible temperature. The MgO must meet
rigid GLO-QUARTZ® specifications.
of Sheath Material
A selection of sheath material is available to meet an unlimited variety
Standard sheath materials are Incoloy®, Types 304 and 316 stainless
steel, copper and titanium.
To put heat where it is needed, tubular elements can be formed to fit most
requirements. GLO-QUARTZ® can form tubular
elements to your exact specifications. See BEND
Tubular elements generally have a threaded terminal for electrical connection
at each end. Other types of terminal connections are available.
Virtually any cold zone can be manufactured, provided cold zone parameters
are not violated.
of Mounting Methods
Elements can be supplied with threaded fitting for mounting through walls
of tanks, ovens, etc. Compression threaded fitting are also available for
easy field installation. Rings, clips, brackets and washers can also be
attached to elements for mounting purposes. See TERMINAL
Tubular heaters are designed for long life and will outlast other tubular
element in a given application. Proper application assures long life.
Consult with one of our applications engineers for assistance.