套(tao)管(guan)伸縮節由能夠作軸向相(xiang)對運動(dong)(dong)的(de)內外(wai)(wai)套(tao)管(guan)組成。內外(wai)(wai)套(tao)管(guan)之間采用(yong)填料函密(mi)封(feng)。使(shi)用(yong)時保持兩(liang)端管(guan)子在一條軸線上移動(dong)(dong)。產品主(zhu)要(yao)有套(tao)筒(tong)(芯管(guan)),外(wai)(wai)殼,密(mi)封(feng)材料等組成.用(yong)于補償管(guan)道的(de)軸向伸縮及任意角度的(de)軸向轉動(dong)(dong).具有體積小補償量大的(de)特點(dian)適用(yong)于熱水、蒸(zheng)氣、油脂類介(jie)質,通過滑(hua)動(dong)(dong)套(tao)筒(tong)對外(wai)(wai)套(tao)筒(tong)的(de)滑(hua)移運動(dong)(dong),達(da)到(dao)熱膨脹的(de)補償。