套(tao)管(guan)伸(shen)縮節(jie)由能夠作(zuo)軸(zhou)向相(xiang)對(dui)運(yun)動(dong)的(de)內(nei)外套(tao)管(guan)組成(cheng)(cheng)。內(nei)外套(tao)管(guan)之間采用(yong)(yong)填(tian)料函密(mi)封(feng)(feng)。使用(yong)(yong)時保持兩(liang)端管(guan)子在一條軸(zhou)線上移動(dong)。產品主要有套(tao)筒(tong)(tong)(芯管(guan)),外殼,密(mi)封(feng)(feng)材料等組成(cheng)(cheng).用(yong)(yong)于補(bu)(bu)償管(guan)道的(de)軸(zhou)向伸(shen)縮及任意角度(du)的(de)軸(zhou)向轉動(dong).具(ju)有體積小補(bu)(bu)償量大(da)的(de)特(te)點(dian)適用(yong)(yong)于熱水、蒸氣、油脂類介質，通過滑(hua)動(dong)套(tao)筒(tong)(tong)對(dui)外套(tao)筒(tong)(tong)的(de)滑(hua)移運(yun)動(dong)，達到熱膨脹(zhang)的(de)補(bu)(bu)償。