U,W,andY--MULTIPLELEGELEMENTS,SILICON.doc

U, W, and Y -- MULTIPLE LEG ELEMENTS, SILICON CARBIDE HEATING ELEMENTS U,W,Y型多段硅碳棒电热元件 GENERAL DESCRIPTION 概述 Made of high density recrystallized silicon carbide, these multiple leg Elements use the same hot zone and cold end material as the RR type Elements and offer a configuration that allows the electrical connections to be made at one end. The low resistance terminal ends allow for cool operation. The LRE (low resistance ends) have a high (15:1) electrical resistance ratio to the hot zone section. The first several inches of the cold ends are metallized with aluminum to provide a low electrical resistance contact surface. The electrical connections are made using flat aluminum braids held in compression to the circumference by a stainless steel spring clamp. U type Elements are described by giving the overall length, the heating section length, the cold end length and the diameter. As an example -- U 23.5 x 12 x 9.5 x 1 is a Element 23.5 overall with a 12 hot zone, 9.5 cold ends and 1 in diameter (U 597 x 305 x 241 x 25 is a Element 597mm overall with a 305mm hot zone, 241mm cold ends and 25mm diameter). 由高密度可再结晶的碳化硅制成，这种多段型硅碳棒和RR型硅碳棒拥有相同的发热部和冷端部，这种结构在连接电路时用其中一根的末端。低阻值末端允许低温操作。冷端部和发热部的有一个高电阻比（15：1）。冷端部的头几个英寸长度有掺入了一定量的金属铝，使其接触面保持一个较低阻值。电路连接是用一个不锈钢弹簧夹具固定在这层铝的周围。U型硅碳棒的总长，发热部的长度，冷端部的长度和直径会给出。例如，U 23.5 x 12 x 9.5 x 1表示其总长为23.5英寸，发热部的长度为12英寸，冷端部的长度为9.5英寸，直径为1英寸(U 597 x 305 x 241 x 25 表示其总长为597毫米，发热部长为305毫米，冷端部长为241毫米，直径为25毫米). SUPERIOR PERFORMANCE 优越性能 Elements have superior performance due to their high density – approximately 2.4 gms/cc. This gives the Element very slow aging characteristics and strength. 这种硅碳棒的优越性能主要归因于它的高密度——大约2.4gms/cc.因此使得该产品具有老化非常缓慢的特性并且非常坚固。 INTERCHANGEABILITY 可替换性 Elements are interchangeable with all silicon carbide heating elements of similar design manufactured in the United States as well as higher resistance heating elements manufactured for the Asian and European markets. It is important to provide the nominal electr