套管(guan)(guan)伸(shen)(shen)縮節由能(neng)夠作軸向相對(dui)運(yun)動(dong)(dong)的(de)(de)(de)內外(wai)套管(guan)(guan)組成。內外(wai)套管(guan)(guan)之間(jian)采用(yong)填料(liao)函密封。使(shi)用(yong)時保持兩端管(guan)(guan)子在一(yi)條軸線上移(yi)動(dong)(dong)。產品主(zhu)要(yao)有套筒(tong)(芯管(guan)(guan)),外(wai)殼,密封材料(liao)等組成.用(yong)于(yu)補償管(guan)(guan)道的(de)(de)(de)軸向伸(shen)(shen)縮及任意角度的(de)(de)(de)軸向轉動(dong)(dong).具(ju)有體積小補償量大的(de)(de)(de)特點(dian)適用(yong)于(yu)熱(re)水、蒸氣(qi)、油(you)脂類介質，通過滑動(dong)(dong)套筒(tong)對(dui)外(wai)套筒(tong)的(de)(de)(de)滑移(yi)運(yun)動(dong)(dong)，達(da)到(dao)熱(re)膨(peng)脹的(de)(de)(de)補償。