The terminal clamps are used to hold the aluminum straps in compression around the circumference of the Starbars. The aluminum strap and terminal clamp should be installed at the very end of the Starbar. There are two types of clamps:
"M" - which derives its name from its similarity to the letter M, and manual.
"T" - which is used with an expansion tool.
The T type clamp is useful for installations where space is limited.
(14) Clamp Strap Combination: The "D" type clamp strap does not require an additional clamp. It is secured around the circumference of the Starbar by the use of a bolt. The strap connection must be flexible so that no physical stress is transmitted to the Starbars. Avoid using large gauge, heavy wire.
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 ...