高壓安全閥的一些選用標準
1.蒸(zheng)汽發電(dian)設備的(de)高(gao)壓旁路安(an)全(quan)(quan)閥，一(yi)般(ban)選用具有安(an)全(quan)(quan)和控制(zhi)雙(shuang)重(zhong)功能的(de)先導式安(an)全(quan)(quan)閥2.若(ruo)要(yao)求對安(an)全(quan)(quan)閥做(zuo)定期開(kai)啟試驗時，應選用帶提升扳(ban)手的(de)安(an)全(quan)(quan)閥。當(dang)介質壓力達到開(kai)啟壓力的(de)75%
以(yi)上(shang)(shang)時，可利(li)用提升扳手將閥瓣(ban)從閥座上(shang)(shang)略(lve)為提起，以(yi)檢查安(an)全閥開(kai)啟的靈活性；3.若(ruo)介質溫度(du)較高時，為了降低彈(dan)簧腔室的溫度(du)，一(yi)般當封閉式(shi)安(an)全閥使(shi)用溫度(du)超過300℃及敞開(kai)式(shi)。
安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)使用(yong)(yong)(yong)(yong)溫度超(chao)過(guo)350℃時(shi)，應(ying)選(xuan)(xuan)用(yong)(yong)(yong)(yong)帶散熱(re)器的安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)；4.若安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)出口背壓(ya)是變動的，其變化量超(chao)過(guo)開啟(qi)壓(ya)力的10%時(shi)，應(ying)選(xuan)(xuan)用(yong)(yong)(yong)(yong)波紋管(guan)安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)；5.若介(jie)(jie)質(zhi)具有腐蝕性時(shi)，應(ying)選(xuan)(xuan)用(yong)(yong)(yong)(yong)波紋管(guan)安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)，防止重要(yao)零件(jian)因受介(jie)(jie)質(zhi)腐蝕而失效。6.蒸汽鍋爐(lu)安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)，一般選(xuan)(xuan)用(yong)(yong)(yong)(yong)敞開全(quan)(quan)(quan)啟(qi)式(shi)(shi)彈簧(huang)(huang)安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)；7.液體(ti)介(jie)(jie)質(zhi)用(yong)(yong)(yong)(yong)安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)，一般選(xuan)(xuan)用(yong)(yong)(yong)(yong)微啟(qi)式(shi)(shi)彈簧(huang)(huang)安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)；8.空氣或其他氣體(ti)介(jie)(jie)質(zhi)用(yong)(yong)(yong)(yong)安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)，一般選(xuan)(xuan)用(yong)(yong)(yong)(yong)封(feng)閉全(quan)(quan)(quan)啟(qi)式(shi)(shi)彈簧(huang)(huang)安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)；9.液化石油(you)氣汽車(che)(che)槽車(che)(che)或液化石油(you)氣鐵路罐車(che)(che)用(yong)(yong)(yong)(yong)安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)，一般選(xuan)(xuan)用(yong)(yong)(yong)(yong)全(quan)(quan)(quan)啟(qi)式(shi)(shi)內裝(zhuang)安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)；10.采(cai)油(you)井出口用(yong)(yong)(yong)(yong)安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)，一般選(xuan)(xuan)用(yong)(yong)(yong)(yong)先導式(shi)(shi)安(an)(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)(fa)(fa)；
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2014-09-05
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