Four Hole Round Ceramic Tube Insulators

Four Hole Round Ceramic Tube Insulators 1.Material: 85 - 99.7% alumina ceramic 2.Purpose:used in thermocouple   Four Hole Round Ceramic Tube Insulators

Gongtao company mainly produce alumina tubes, rods and various industrial ceramic parts, which are mainly used in thermalcouple temperature, liquid steel continous temperature, various industrial furnace(containig vacuum furnace, carburizing furnace, wire furnace, atmosphere furnace etc), especially widely used in petrochemical, spinning, electric, instrumentation, mechanical workout, military project etc industry.

Our items are various and exported to many countries.Welcome to contact us!

They are recommended for use in mass spectrometers and other vacuum systems as feed through lines, thermocouple insulators, and in other applications requiring electrical and thermal insulators. Other types are also available - two hole, four hole insulator tubes, and solid rods.

Single bore ceramic beads:

ID	0.2	0.3	1	1	1	1.5	1.5	1.5	2	2	2
OD	0.6	1.5	2	2	2.2	3	3	3	4	4	4
Length	4	2.5	10	10	3.5	4	10	30	4	6	10

 

Double rond bore ceramic beads

ID	2	3	4	6	7	9	1.2	1.2	1.5	2	2
OD	5	7	9	11	13	15	5	5	7	8	9
Length	5	7	9	11	13	15	10	35	10	25	50

 

Oval double bore ceramic beads

Dia of bore	2.5	3.5	3.5	4	4
Long dia.	9	10	10	13	13
Oval dia.	7	8	8	10	10
Length	25	20	20	25	25

Property of material:

Material	85 Al2o3	90 Al2o3	95 Al2o3	99 Al2o3
Al2o3	85%	90%	93%	99.30%
Fe2o3	≤ 1.0	≤ 0.5	≤ 0.5	≤ 0.3
Desnsity: g / cm3	3.4	3.5	3.6	3.85
Vickers Hardness	≥ 8.6	≥ 8.8	9	9
Water Absorption:%	≤ 0.2	≤ 0.1	≤ 0.085	≤ 0.01
Refractoriness:°C	1580 °C	1600 °C	1650 °C	1800°C
Flexural Strength:Mpa	180	200	240	280
Wear Rate( at room temperature,  erosion, 100 grinding)%	≤ 3	≤ 2.5	≤ 1	≤ 0.5

Other information:

Feature	Application	Main usage
1.Great mechanical strength	Electric appliance industry                                      Automotive industry	1.Heat treatment furnace  and toughened furnace
2.High softening temperature
3.Good resistance to thermal impact
4.Small thermal expansion coefficient	Mechanical industry               Engineer industry	2.Inner liner tube and heating  tube in electric furnace
5.Good chill and abrupt heat properties
6. Resistance to acid and alkali corrosion

Four Hole Round Ceramic Tube Insulators