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Starbar® & Moly-D® Heating Elements > Starbar Silicon Carbide SiC Heating Elements > Starbar Silicon Carbide Heating Element Accessories > Terminal Gasket Assemblies > Item # TGA-70-1  
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Item # TGA-70-1, Terminal Gasket Assembly



The TGA consists of two ceramic fiber washers, one steel washer, and a spring.

The TGA is used as an alternative to packing ceramic fiber insulation around the Starbar cold end. Ceramic fiber insulation is often used at the cold face of the furnace to help reduce furnace energy losses.

There are advantages to using the TGA rather than packing ceramic fiber insulation around the Starbar. Because the TGA is spring-loaded it allows the Starbar freedom of movement. If ceramic fiber is packed too tightly it can cause tremendous physical stresses to be exerted to the Starbars, possibly leading to failures due to breakage. Freedom of movement is important because there is movement between the Starbars and the furnace walls created by different thermal expansion rates.

Installing of TGA is also quicker than packing with ceramic fiber.

Neither of these methods are intended to be an atmosphere seal. It is to help reduce radiant energy losses, and to a smaller degree some convection heat losses.

There are two free spring lengths, 1 inch (25 mm) and 3 inches (75 mm). The last digit of the part number is used to call out the free spring length.





Specifications  · Tables and Charts

Specifications

Starbar Diameter

2.75 Inch
70
mm

Steel Washer ID

2.88 Inch
73
mm

Steel Washer OD

4.12 Inch
105
mm

Ceramic Fiber Washer ID

2.75 Inch
70
mm

Ceramic Fiber Washer OD

4.50 Inch
114
mm

Free Spring Length

1 Inch
25
mm

Approx. Ceramic Fiber Washer Thickness

0.125 Inch
3.2
mm

Availability

Most sizes are available from stock. Others can be shipped in one week, or quicker for emergencies.

Note

The last digit of the part number represents the Free Spring Length in Inches, either 1 or 3.

This Strap and Clamps are shown for illustrative purposes and are not supplied with TGA assembly.


Tables and Charts

Terminal Gasket Assembly

TERMINAL GASKET ASSEMBLY
Starbar Diameter * Part Number Steel Washer ID Steel Washer OD Ceramic Fiber Washer ID Ceramic Fiber Washer OD
MM Inch   MM Inch MM Inch MM Inch MM Inch
10 0.38 TGA-10-_ 11 0.44 25 1.00 9.5 0.38 32 1.25
11 0.44 TGA-11-_ 13 0.50 32 1.25 11 0.44 38 1.50
13 0.50 TGA-13-_ 14 0.56 32 1.25 13 0.50 38 1.50
16 0.63 TGA-16-_ 17 0.65 35 1.38 16 0.63 45 1.88
19 0.75 TGA-19-_ 20 0.78 38 1.50 19 0.75 51 2.00
25 1.00 TGA-25-_ 27 1.06 51 2.00 25 1.00 64 2.50
32 1.25 TGA-32-_ 33 1.31 70 2.75 30 1.18 83 3.25
35 1.38 TGA-35-_ 36 1.44 70 2.75 35 1.38 83 3.25
38 1.50 TGA-38-_ 40 1.56 70 2.75 37 1.44 83 3.25
44 1.75 TGA-44-_ 47 1.88 83 3.25 43 1.69 95 3.75
54 2.12 TGA-54-_ 56 2.22 89 3.50 51 2.00 101 4.00
64 2.50 TGA-64_ 63 2.50 105 4.12 63 2.50 114 4.50
70 2.75 TGA-70-_ 73 2.88 105 4.12 70 2.75 114 4.50
For All TGA: MM Inch  
Free Spring Length 25 or 75 1 or 3
Ceramic Fiber Washer Thickness Approx. 3.2 Approx. 0.125
* The last digit of the part number represents the Free Spring Length in Inches, either 1 or 3.
Parts can also be purchased separately. When ordering separately
the steel washers, ceramic fiber washers, and springs are designated
by TW-_ _, TG-_ _, and TS-_ _-1 or TS-_ _-3 respectively.


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