套(tao)管(guan)伸縮(suo)節(jie)由能夠作(zuo)軸(zhou)向(xiang)相對(dui)運動(dong)的內(nei)外(wai)套(tao)管(guan)組成。內(nei)外(wai)套(tao)管(guan)之間采(cai)用(yong)(yong)(yong)填料函(han)密封。使用(yong)(yong)(yong)時保持兩(liang)端管(guan)子(zi)在一(yi)條軸(zhou)線(xian)上移(yi)動(dong)。產品主(zhu)要有(you)套(tao)筒(tong)(芯管(guan)),外(wai)殼,密封材料等組成.用(yong)(yong)(yong)于(yu)補償(chang)管(guan)道的軸(zhou)向(xiang)伸縮(suo)及任意角度的軸(zhou)向(xiang)轉動(dong).具(ju)有(you)體積小補償(chang)量大的特點(dian)適(shi)用(yong)(yong)(yong)于(yu)熱水、蒸氣、油脂類介質，通過(guo)滑動(dong)套(tao)筒(tong)對(dui)外(wai)套(tao)筒(tong)的滑移(yi)運動(dong)，達到(dao)熱膨脹的補償(chang)。