套(tao)管(guan)(guan)伸縮節(jie)由能夠作(zuo)軸(zhou)向(xiang)(xiang)相對(dui)運(yun)動(dong)(dong)(dong)的內外套(tao)管(guan)(guan)組(zu)成(cheng)。內外套(tao)管(guan)(guan)之間采(cai)用填料函密(mi)封。使(shi)用時保持兩(liang)端管(guan)(guan)子(zi)在一條軸(zhou)線上移動(dong)(dong)(dong)。產品主要有套(tao)筒(芯管(guan)(guan)),外殼(ke),密(mi)封材料等(deng)組(zu)成(cheng).用于補(bu)償管(guan)(guan)道的軸(zhou)向(xiang)(xiang)伸縮及任意角度(du)的軸(zhou)向(xiang)(xiang)轉動(dong)(dong)(dong).具有體積(ji)小(xiao)補(bu)償量大(da)的特點適(shi)用于熱水、蒸氣、油脂(zhi)類介質(zhi)，通過(guo)滑(hua)動(dong)(dong)(dong)套(tao)筒對(dui)外套(tao)筒的滑(hua)移運(yun)動(dong)(dong)(dong)，達到(dao)熱膨脹的補(bu)償。