橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)密封件(jian)是(shi)(shi)實現泵(beng)密封的(de)(de)(de)(de)(de)(de)(de)(de)關(guan)鍵之(zhi)(zhi)一(yi)。常(chang)見(jian)的(de)(de)(de)(de)(de)(de)(de)(de)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)密封材(cai)料：三(san)(san)(san)(san)(san)元(yuan)(yuan)乙(yi)(yi)丙(bing)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)、丁(ding)腈(jing)(jing)(jing)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)、硅橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)和(he)氟(fu)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)，它(ta)們(men)有(you)(you)不同的(de)(de)(de)(de)(de)(de)(de)(de)性(xing)(xing)(xing)(xing)(xing)(xing)(xing)能(neng)(neng)和(he)用(yong)(yong)途。如何選擇正確(que)的(de)(de)(de)(de)(de)(de)(de)(de)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)密封材(cai)料，是(shi)(shi)保證(zheng)產品(pin)(pin)(pin)質量的(de)(de)(de)(de)(de)(de)(de)(de)關(guan)鍵之(zhi)(zhi)一(yi)。下面先(xian)來介紹每(mei)種(zhong)材(cai)料的(de)(de)(de)(de)(de)(de)(de)(de)性(xing)(xing)(xing)(xing)(xing)(xing)(xing)能(neng)(neng)。 三(san)(san)(san)(san)(san)元(yuan)(yuan)乙(yi)(yi)丙(bing)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)（英文(wen)簡稱EPDM）是(shi)(shi)目前飲(yin)用(yong)(yong)水輸送系(xi)統(tong)中(zhong)*常(chang)用(yong)(yong)的(de)(de)(de)(de)(de)(de)(de)(de)一(yi)種(zhong)材(cai)料。三(san)(san)(san)(san)(san)元(yuan)(yuan)乙(yi)(yi)丙(bing)生膠(jiao)(jiao)(jiao)由(you)乙(yi)(yi)烯(xi)、丙(bing)烯(xi)和(he)*三(san)(san)(san)(san)(san)種(zhong)特殊(shu)結構(gou)的(de)(de)(de)(de)(de)(de)(de)(de)單體共聚反應合成(cheng)。由(you)于其(qi)分子主(zhu)鏈(lian)結構(gou)上沒(mei)有(you)(you)不飽和(he)鍵，三(san)(san)(san)(san)(san)元(yuan)(yuan)乙(yi)(yi)丙(bing)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)具(ju)有(you)(you)優(you)異(yi)(yi)的(de)(de)(de)(de)(de)(de)(de)(de)抗氧(yang)(yang)化、耐(nai)(nai)(nai)(nai)臭氧(yang)(yang)性(xing)(xing)(xing)(xing)(xing)(xing)(xing)、耐(nai)(nai)(nai)(nai)紫外線和(he)耐(nai)(nai)(nai)(nai)熱性(xing)(xing)(xing)(xing)(xing)(xing)(xing)（即耐(nai)(nai)(nai)(nai)候(hou)(hou)(hou)性(xing)(xing)(xing)(xing)(xing)(xing)(xing)好）。同時，它(ta)還具(ju)有(you)(you)優(you)異(yi)(yi)的(de)(de)(de)(de)(de)(de)(de)(de)耐(nai)(nai)(nai)(nai)水性(xing)(xing)(xing)(xing)(xing)(xing)(xing)和(he)耐(nai)(nai)(nai)(nai)水蒸(zheng)汽性(xing)(xing)(xing)(xing)(xing)(xing)(xing)。三(san)(san)(san)(san)(san)元(yuan)(yuan)乙(yi)(yi)丙(bing)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)的(de)(de)(de)(de)(de)(de)(de)(de)使(shi)(shi)(shi)(shi)用(yong)(yong)溫度(du)范圍也很(hen)(hen)廣，一(yi)般(ban)地說，它(ta)可(ke)以在(zai)(zai)(zai)(zai)-40℃到(dao)125℃之(zhi)(zhi)間長(chang)期使(shi)(shi)(shi)(shi)用(yong)(yong)。特殊(shu)的(de)(de)(de)(de)(de)(de)(de)(de)配方(fang)可(ke)以將低溫性(xing)(xing)(xing)(xing)(xing)(xing)(xing)能(neng)(neng)降(jiang)(jiang)到(dao)-55℃左右；或(huo)者將高(gao)(gao)溫上限提高(gao)(gao)到(dao)150℃。值得注意的(de)(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)，三(san)(san)(san)(san)(san)元(yuan)(yuan)乙(yi)(yi)丙(bing)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)不耐(nai)(nai)(nai)(nai)脂(zhi)肪烴和(he)芳香烴等(deng)油(you)(you)(you)(you)(you)類(lei)(lei)。在(zai)(zai)(zai)(zai)有(you)(you)礦(kuang)物油(you)(you)(you)(you)(you)、汽油(you)(you)(you)(you)(you)、燃油(you)(you)(you)(you)(you)等(deng)環境下，三(san)(san)(san)(san)(san)元(yuan)(yuan)乙(yi)(yi)丙(bing)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)件(jian)會(hui)很(hen)(hen)快溶(rong)脹，同時機(ji)械(xie)(xie)強度(du)會(hui)大大降(jiang)(jiang)低。所以，三(san)(san)(san)(san)(san)元(yuan)(yuan)乙(yi)(yi)丙(bing)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)件(jian)不能(neng)(neng)使(shi)(shi)(shi)(shi)用(yong)(yong)基于石油(you)(you)(you)(you)(you)的(de)(de)(de)(de)(de)(de)(de)(de)潤滑油(you)(you)(you)(you)(you)。 丁(ding)腈(jing)(jing)(jing)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)（英文(wen)簡稱NBR）在(zai)(zai)(zai)(zai)水輸送系(xi)統(tong)中(zhong)也很(hen)(hen)常(chang)見(jian)。這類(lei)(lei)彈性(xing)(xing)(xing)(xing)(xing)(xing)(xing)體是(shi)(shi)由(you)丁(ding)二(er)烯(xi)和(he)丙(bing)烯(xi)腈(jing)(jing)(jing)共聚而成(cheng)的(de)(de)(de)(de)(de)(de)(de)(de)。一(yi)般(ban)地說，丁(ding)腈(jing)(jing)(jing)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)產品(pin)(pin)(pin)可(ke)以在(zai)(zai)(zai)(zai)-55℃到(dao)100℃之(zhi)(zhi)間使(shi)(shi)(shi)(shi)用(yong)(yong)。當丙(bing)烯(xi)腈(jing)(jing)(jing)成(cheng)分增加(jia)時，該丁(ding)腈(jing)(jing)(jing)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)產品(pin)(pin)(pin)的(de)(de)(de)(de)(de)(de)(de)(de)耐(nai)(nai)(nai)(nai)熱性(xing)(xing)(xing)(xing)(xing)(xing)(xing)、耐(nai)(nai)(nai)(nai)油(you)(you)(you)(you)(you)性(xing)(xing)(xing)(xing)(xing)(xing)(xing)、耐(nai)(nai)(nai)(nai)磨性(xing)(xing)(xing)(xing)(xing)(xing)(xing)等(deng)都有(you)(you)提高(gao)(gao)，但其(qi)耐(nai)(nai)(nai)(nai)低溫性(xing)(xing)(xing)(xing)(xing)(xing)(xing)會(hui)下降(jiang)(jiang)。丁(ding)腈(jing)(jing)(jing)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)的(de)(de)(de)(de)(de)(de)(de)(de)耐(nai)(nai)(nai)(nai)水膠(jiao)(jiao)(jiao)好。一(yi)般(ban)在(zai)(zai)(zai)(zai)水輸送系(xi)統(tong)中(zhong)選擇丁(ding)腈(jing)(jing)(jing)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)是(shi)(shi)因為橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)件(jian)在(zai)(zai)(zai)(zai)使(shi)(shi)(shi)(shi)用(yong)(yong)中(zhong)可(ke)能(neng)(neng)會(hui)碰(peng)到(dao)礦(kuang)物油(you)(you)(you)(you)(you)等(deng)油(you)(you)(you)(you)(you)脂(zhi)，比如污水處理等(deng)。 硅橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)彈性(xing)(xing)(xing)(xing)(xing)(xing)(xing)體是(shi)(shi)由(you)聚二(er)甲基硅氧(yang)(yang)烷(wan)合成(cheng)的(de)(de)(de)(de)(de)(de)(de)(de)。它(ta)具(ju)有(you)(you)優(you)異(yi)(yi)的(de)(de)(de)(de)(de)(de)(de)(de)耐(nai)(nai)(nai)(nai)水性(xing)(xing)(xing)(xing)(xing)(xing)(xing)、耐(nai)(nai)(nai)(nai)候(hou)(hou)(hou)性(xing)(xing)(xing)(xing)(xing)(xing)(xing)、耐(nai)(nai)(nai)(nai)臭氧(yang)(yang)性(xing)(xing)(xing)(xing)(xing)(xing)(xing)等(deng)性(xing)(xing)(xing)(xing)(xing)(xing)(xing)能(neng)(neng)，同時還有(you)(you)氣味(wei)小、易加(jia)工成(cheng)型等(deng)優(you)點(dian)。普通硅橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)可(ke)以在(zai)(zai)(zai)(zai)-55℃到(dao)225℃之(zhi)(zhi)間使(shi)(shi)(shi)(shi)用(yong)(yong)。硅膠(jiao)(jiao)(jiao)的(de)(de)(de)(de)(de)(de)(de)(de)缺(que)點(dian)是(shi)(shi)抗拉伸強度(du)不好，抗撕(si)裂(lie)性(xing)(xing)(xing)(xing)(xing)(xing)(xing)和(he)耐(nai)(nai)(nai)(nai)磨性(xing)(xing)(xing)(xing)(xing)(xing)(xing)也不好，價(jia)格也較高(gao)(gao)。 氟(fu)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)（英文(wen)簡稱FKM）種(zhong)類(lei)(lei)很(hen)(hen)多，但是(shi)(shi)它(ta)們(men)在(zai)(zai)(zai)(zai)結構(gou)上都是(shi)(shi)在(zai)(zai)(zai)(zai)主(zhu)鏈(lian)或(huo)側鏈(lian)的(de)(de)(de)(de)(de)(de)(de)(de)碳原(yuan)子上帶(dai)有(you)(you)氟(fu)原(yuan)子。氟(fu)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)具(ju)有(you)(you)高(gao)(gao)度(du)的(de)(de)(de)(de)(de)(de)(de)(de)耐(nai)(nai)(nai)(nai)熱性(xing)(xing)(xing)(xing)(xing)(xing)(xing)，優(you)良的(de)(de)(de)(de)(de)(de)(de)(de)化學惰(duo)性(xing)(xing)(xing)(xing)(xing)(xing)(xing)（耐(nai)(nai)(nai)(nai)化學品(pin)(pin)(pin)、耐(nai)(nai)(nai)(nai)腐(fu)蝕、耐(nai)(nai)(nai)(nai)油(you)(you)(you)(you)(you)），很(hen)(hen)好的(de)(de)(de)(de)(de)(de)(de)(de)物理機(ji)械(xie)(xie)性(xing)(xing)(xing)(xing)(xing)(xing)(xing)能(neng)(neng)（包括耐(nai)(nai)(nai)(nai)磨）以及優(you)異(yi)(yi)的(de)(de)(de)(de)(de)(de)(de)(de)耐(nai)(nai)(nai)(nai)候(hou)(hou)(hou)性(xing)(xing)(xing)(xing)(xing)(xing)(xing)和(he)抗老化性(xing)(xing)(xing)(xing)(xing)(xing)(xing)。通用(yong)(yong)型的(de)(de)(de)(de)(de)(de)(de)(de)氟(fu)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)產品(pin)(pin)(pin)一(yi)般(ban)可(ke)以在(zai)(zai)(zai)(zai)-25℃到(dao)200℃之(zhi)(zhi)間使(shi)(shi)(shi)(shi)用(yong)(yong)。在(zai)(zai)(zai)(zai)水輸送系(xi)統(tong)中(zhong)，氟(fu)橡(xiang)(xiang)(xiang)(xiang)(xiang)膠(jiao)(jiao)(jiao)的(de)(de)(de)(de)(de)(de)(de)(de)主(zhu)要缺(que)點(dian)是(shi)(shi)價(jia)格太高(gao)(gao)。