Electric heating radiant tube is to put the electric heating element enclosed in a protective sleeve, after electrify heats, the casing of heat radiation to furnace lining and heated indirectly artifacts.Radiant tube heating is suitable for the general protection of atmosphere and corrosive atmosphere furnace, continuous furnace, such as roller furnace, pit type furnace and so on.Electric heating radiant tube:1, feeds spiral around a electric heating radiant tube this electric heating radiant tube is composed of heat-resistant alloy steel casing and heater, electric heater by phi is commonly 3-5 mm wire around the open with spiral groove of the heat insulation on the ceramic tube core, working voltage 220 v, general 5 to 7 kw power.2, banded spiral around the structure of the electric heating radiant tube this heater is basically the same as the first kind of structure, just heating element USES belt winding resistance, resistance to take general thickness of 1-3 mm, width of 10-20 mm, tube core of radiant tube also for multiple groups more type of tube core, under the same surface load, radiant tube heat radiating surface is big, can save material, general power point heat radiant tube using this form.3, axial twists and turns form cage cabinet type electric heating radiant tube (commonly known as squirrel cage) its structure is the resistance wire heating element (with) series with a "U" shaped bend more pieces of insulation resistance to high temperature ceramic support plate, the middle with a heat-resistant bar, generally effective length: 900 ~ 2400;General: casing diameter from 80 ~ 80.Such a radiant tube joint power: 2 kw and 40 kw;Single voltage: 30 v ~ 220 v.The radiant tube longer service life.