安(an)(an)(an)全(quan)閥：空(kong)氣(qi)壓(ya)(ya)縮機(ji)安(an)(an)(an)全(quan)閥是(shi)(shi)(shi)保(bao)證壓(ya)(ya)力(li)管道、壓(ya)(ya)力(li)容器的(de)(de)(de)關鍵(jian)安(an)(an)(an)全(quan)應(ying)用(yong)保(bao)障，是(shi)(shi)(shi)空(kong)氣(qi)壓(ya)(ya)縮機(ji)配(pei)件之一(yi)。為了(le)保(bao)證安(an)(an)(an)全(quan)閥的(de)(de)(de)正(zheng)常(chang)工作及(ji)延長(chang)安(an)(an)(an)全(quan)閥的(de)(de)(de)使用(yong)壽命，在使用(yong)中應(ying)做到(dao)定期檢(jian)查運(yun)行中的(de)(de)(de)安(an)(an)(an)全(quan)閥是(shi)(shi)(shi)否泄(xie)漏(lou)，卡阻及(ji)彈簧銹(xiu)蝕(shi)等不(bu)正(zheng)常(chang)現象，并注意觀察調(diao)節螺套及(ji)調(diao)節圈緊定螺釘的(de)(de)(de)鎖緊螺母是(shi)(shi)(shi)否有松動，若發(fa)(fa)現問題及(ji)時(shi)采取(qu)適當的(de)(de)(de)維護措施(shi)。空(kong)氣(qi)壓(ya)(ya)縮機(ji)安(an)(an)(an)全(quan)閥屬于自動閥類，它的(de)(de)(de)工作原理是(shi)(shi)(shi)，當空(kong)氣(qi)壓(ya)(ya)縮機(ji)或(huo)(huo)者是(shi)(shi)(shi)管道內的(de)(de)(de)介質壓(ya)(ya)力(li)升高(gao)超過(guo)規(gui)定值的(de)(de)(de)時(shi)候，就會通過(guo)向系統外(wai)排放介質來(lai)防(fang)止(zhi)管道或(huo)(huo)設備介質壓(ya)(ya)力(li)超過(guo)規(gui)定數值的(de)(de)(de)特殊閥門(men)，控制壓(ya)(ya)力(li)不(bu)超過(guo)規(gui)定值的(de)(de)(de)時(shi)候，就可(ke)以對(dui)空(kong)氣(qi)壓(ya)(ya)縮機(ji)運(yun)行和人身安(an)(an)(an)全(quan)起到(dao)一(yi)個重要的(de)(de)(de)保(bao)護作用(yong)。據《安(an)(an)(an)全(quan)閥安(an)(an)(an)全(quan)技術(shu)監察規(gui)程》中規(gui)定安(an)(an)(an)全(quan)閥的(de)(de)(de)定期校(xiao)驗，一(yi)般是(shi)(shi)(shi)每年至少一(yi)次的(de)(de)(de)，安(an)(an)(an)全(quan)技術(shu)規(gui)范應(ying)該要有相應(ying)的(de)(de)(de)規(gui)定。發(fa)(fa)現泄(xie)漏(lou)應(ying)及(ji)時(shi)檢(jian)修或(huo)(huo)更換，嚴(yan)禁(jin)用(yong)加大載荷的(de)(de)(de)辦法來(lai)消除(chu)泄(xie)漏(lou)。在線安(an)(an)(an)全(quan)閥熱態(tai)校(xiao)驗

國家(jia)質量監督局鍋(guo)(guo)(guo)(guo)(guo)爐(lu)壓(ya)(ya)力(li)(li)容器監察局頒布的(de)《蒸汽鍋(guo)(guo)(guo)(guo)(guo)爐(lu)安(an)(an)全(quan)(quan)技(ji)(ji)術監察規程(cheng)》也有明(ming)確的(de)規定，第(di)146條(tiao)“用在(zai)(zai)(zai)鍋(guo)(guo)(guo)(guo)(guo)爐(lu)的(de)安(an)(an)全(quan)(quan)閥(fa)(fa)每(mei)年(nian)至少應(ying)(ying)校(xiao)驗(yan)(yan)(yan)(yan)一(yi)次(ci)。安(an)(an)全(quan)(quan)閥(fa)(fa)的(de)校(xiao)驗(yan)(yan)(yan)(yan)一(yi)般應(ying)(ying)在(zai)(zai)(zai)鍋(guo)(guo)(guo)(guo)(guo)爐(lu)運行(xing)狀態下進(jin)行(xing)。”純機械彈簧(huang)式安(an)(an)全(quan)(quan)閥(fa)(fa)可采用液壓(ya)(ya)裝置(zhi)進(jin)行(xing)校(xiao)驗(yan)(yan)(yan)(yan)調整，一(yi)般在(zai)(zai)(zai)75%～80%額(e)定壓(ya)(ya)力(li)(li)下進(jin)行(xing)。經(jing)液壓(ya)(ya)裝置(zhi)調整后的(de)安(an)(an)全(quan)(quan)閥(fa)(fa)，應(ying)(ying)至少對(dui)比較低(di)起(qi)座值的(de)安(an)(an)全(quan)(quan)閥(fa)(fa)進(jin)行(xing)實際起(qi)座復核。安(an)(an)全(quan)(quan)閥(fa)(fa)檢驗(yan)(yan)(yan)(yan)小知(zhi)識在(zai)(zai)(zai)役電站鍋(guo)(guo)(guo)(guo)(guo)爐(lu)安(an)(an)全(quan)(quan)閥(fa)(fa)每(mei)年(nian)至少應(ying)(ying)校(xiao)驗(yan)(yan)(yan)(yan)一(yi)次(ci)。每(mei)一(yi)個小周期應(ying)(ying)進(jin)行(xing)檢查，必(bi)要時應(ying)(ying)進(jin)行(xing)校(xiao)驗(yan)(yan)(yan)(yan)或(huo)排放(fang)試驗(yan)(yan)(yan)(yan)。各類壓(ya)(ya)力(li)(li)容器的(de)安(an)(an)全(quan)(quan)閥(fa)(fa)每(mei)年(nian)應(ying)(ying)至少進(jin)行(xing)一(yi)次(ci)排放(fang)試驗(yan)(yan)(yan)(yan)或(huo)在(zai)(zai)(zai)線校(xiao)驗(yan)(yan)(yan)(yan)。安(an)(an)全(quan)(quan)閥(fa)(fa)一(yi)經(jing)校(xiao)驗(yan)(yan)(yan)(yan)合格(ge)就應(ying)(ying)加(jia)鎖或(huo)加(jia)鉛封，并在(zai)(zai)(zai)鍋(guo)(guo)(guo)(guo)(guo)爐(lu)技(ji)(ji)術登錄(lu)簿或(huo)壓(ya)(ya)力(li)(li)容器技(ji)(ji)術檔案中(zhong)(zhong)記錄(lu)安(an)(an)順(shun)安(an)(an)全(quan)(quan)閥(fa)(fa)機構中(zhong)(zhong)心(xin)安(an)(an)全(quan)(quan)閥(fa)(fa)與鍋(guo)(guo)(guo)(guo)(guo)爐(lu)的(de)汽包、聯箱之間一(yi)般不得裝設截止閥(fa)(fa)門，或(huo)取(qu)用蒸汽的(de)引出(chu)管。

怎樣(yang)檢驗(yan)(yan)空(kong)壓(ya)機(ji)閥(fa)(fa)(fa)(fa)門(men)(men)(men)：1.校檢臺(tai)線下校檢：便是(shi)(shi)(shi)要(yao)將閥(fa)(fa)(fa)(fa)門(men)(men)(men)安(an)裝在校檢臺(tai)子(zi)上(shang)，隨(sui)后再應用(yong)(yong)校檢物(wu)質(zhi)使閥(fa)(fa)(fa)(fa)門(men)(men)(men)打(da)開(kai)，仔細觀(guan)(guan)察氣壓(ya)表來(lai)確定打(da)開(kai)的(de)(de)(de)工作壓(ya)力(li)(li)。可(ke)(ke)是(shi)(shi)(shi)這類方式沒(mei)法充分考慮凝汽式閥(fa)(fa)(fa)(fa)門(men)(men)(men)和高溫(wen)或是(shi)(shi)(shi)是(shi)(shi)(shi)**溫(wen)物(wu)質(zhi)的(de)(de)(de)安(an)全閥(fa)(fa)(fa)(fa)校驗(yan)(yan)。2.線上(shang)儀器校驗(yan)(yan)：便是(shi)(shi)(shi)根據外(wai)力(li)(li)作用(yong)(yong)將功效在閥(fa)(fa)(fa)(fa)門(men)(men)(men)上(shang)往下的(de)(de)(de)彈黃相(xiang)互作用(yong)(yong)力(li)(li)測到，能(neng)夠為此(ci)來(lai)測算出閥(fa)(fa)(fa)(fa)門(men)(men)(men)的(de)(de)(de)打(da)開(kai)工作壓(ya)力(li)(li)，這類方式一(yi)般不(bu)是(shi)(shi)(shi)危(wei)害生產制(zhi)造、系統(tong)軟(ruan)件(jian)工作壓(ya)力(li)(li)也無(wu)需更改的(de)(de)(de)，其(qi)檢驗(yan)(yan)的(de)(de)(de)速率相(xiang)對而言(yan)也較為快(kuai)、并(bing)且較為便捷(jie)便捷(jie)，可(ke)(ke)是(shi)(shi)(shi)該方式卻不(bu)可(ke)(ke)以(yi)檢驗(yan)(yan)閥(fa)(fa)(fa)(fa)門(men)(men)(men)的(de)(de)(de)密封性特(te)性。3.變壓(ya)式跳法驗(yan)(yan)證：便是(shi)(shi)(shi)將閥(fa)(fa)(fa)(fa)門(men)(men)(men)放到系統(tong)軟(ruan)件(jian)中安(an)裝，系統(tong)軟(ruan)件(jian)人(ren)為因(yin)素變壓(ya)，直到閥(fa)(fa)(fa)(fa)門(men)(men)(men)跳起，來(lai)觀(guan)(guan)察閥(fa)(fa)(fa)(fa)門(men)(men)(men)的(de)(de)(de)打(da)開(kai)工作壓(ya)力(li)(li)，這類校檢方式對閥(fa)(fa)(fa)(fa)門(men)(men)(men)的(de)(de)(de)突面損害回很大，實際操作的(de)(de)(de)危(wei)險因(yin)素也相(xiang)對性別的(de)(de)(de)來(lai)講很大。

低(di)溫(wen)儲罐安全閥(fa)(fa)(fa)(fa)(fa)(fa)校驗更(geng)換注意事項低(di)溫(wen)三(san)(san)通(tong)(tong)(tong)球(qiu)(qiu)(qiu)閥(fa)(fa)(fa)(fa)(fa)(fa)使用(yong)須知1.結(jie)構(gou)特(te)點與(yu)工作原(yuan)理(li)a)結(jie)構(gou)特(te)點浮(fu)(fu)動(dong)球(qiu)(qiu)(qiu)設(she)計,可利用(yong)閥(fa)(fa)(fa)(fa)(fa)(fa)桿(gan)帶動(dong)球(qiu)(qiu)(qiu)體旋(xuan)轉(zhuan)180°運動(dong)。實現對通(tong)(tong)(tong)道(dao)的(de)(de)選(xuan)擇(ze)與(yu)調節(jie)介質(zhi)流量(liang)的(de)(de)功能(neng)。適(shi)用(yong)于低(di)溫(wen)及深冷介質(zhi)的(de)(de)管路系(xi)統,b)工作原(yuan)理(li)①三(san)(san)通(tong)(tong)(tong)浮(fu)(fu)動(dong)球(qiu)(qiu)(qiu)與(yu)兩個閥(fa)(fa)(fa)(fa)(fa)(fa)座(球(qiu)(qiu)(qiu)襯(chen))配(pei)合達(da)到(dao)密封(feng),球(qiu)(qiu)(qiu)體借(jie)助閥(fa)(fa)(fa)(fa)(fa)(fa)桿(gan)可以(yi)自由地在(zai)(zai)閥(fa)(fa)(fa)(fa)(fa)(fa)座中180°旋(xuan)轉(zhuan)②當閥(fa)(fa)(fa)(fa)(fa)(fa)桿(gan)轉(zhuan)動(dong)至(zhi)(90°)手(shou)(shou)柄垂(chui)直居(ju)中時,閥(fa)(fa)(fa)(fa)(fa)(fa)門趨(qu)于雙通(tong)(tong)(tong)道(dao)開(kai)啟(qi)(三(san)(san)通(tong)(tong)(tong))模(mo)式；③閥(fa)(fa)(fa)(fa)(fa)(fa)桿(gan)位子(180°)手(shou)(shou)柄水平時,閥(fa)(fa)(fa)(fa)(fa)(fa)門趨(qu)于単通(tong)(tong)(tong)道(dao)切換開(kai)啟(qi)模(mo)式(左(zuo)通(tong)(tong)(tong)或右(you)通(tong)(tong)(tong))；2.操(cao)作A手(shou)(shou)動(dong)操(cao)作①將(jiang)(jiang)閥(fa)(fa)(fa)(fa)(fa)(fa)桿(gan)(手(shou)(shou)柄)轉(zhuan)至(zhi)(90°)手(shou)(shou)柄垂(chui)直居(ju)中時,閥(fa)(fa)(fa)(fa)(fa)(fa)門趨(qu)于雙通(tong)(tong)(tong)道(dao)開(kai)啟(qi)（三(san)(san)通(tong)(tong)(tong)）模(mo)式；②將(jiang)(jiang)閥(fa)(fa)(fa)(fa)(fa)(fa)桿(gan)(手(shou)(shou)柄)轉(zhuan)至(zhi)(180°)手(shou)(shou)柄在(zai)(zai)左(zuo)時,左(zuo)面(mian)通(tong)(tong)(tong);手(shou)(shou)柄在(zai)(zai)右(you)時，右(you)面(mian)通(tong)(tong)(tong)；③將(jiang)(jiang)閥(fa)(fa)(fa)(fa)(fa)(fa)桿(gan)(手(shou)(shou)柄)在(zai)(zai)5°至(zhi)175°之間(jian)調節(jie),可控制二出口的(de)(de)流量(liang)。仍然趨(qu)于三(san)(san)通(tong)(tong)(tong)模(mo)式;說明(ming):手(shou)(shou)柄垂(chui)直居(ju)中時完全趨(qu)于三(san)(san)通(tong)(tong)(tong)模(mo)式;手(shou)(shou)柄必須在(zai)(zai)180°時才能(neng)進行左(zuo)右(you)通(tong)(tong)(tong)道(dao)切換；b)注意事項①請勿使用(yong)加力桿(gan)等輔(fu)助工具開(kai)關閥(fa)(fa)(fa)(fa)(fa)(fa)門,避免零件(jian)(jian)(jian)及密封(feng)件(jian)(jian)(jian)受損！②低(di)溫(wen)下嚴禁敲擊各部件(jian)(jian)(jian)上的(de)(de)冰(bing)霜(shuang),。不支持(chi)采用(yong)任何方(fang)式的(de)(de)高(gao)溫(wen)對閥(fa)(fa)(fa)(fa)(fa)(fa)門升溫(wen)、解凍！3.日(ri)常(chang)維(wei)護保養①定期檢査:a.閥(fa)(fa)(fa)(fa)(fa)(fa)門各緊固件(jian)(jian)(jian)的(de)(de)緊固狀態(鏈接螺(luo)栓(shuan))。B.密封(feng)件(jian)(jian)(jian)是(shi)否完好。②易損件(jian)(jian)(jian)：經常(chang)檢查鉛(qian)封(feng)，防(fang)止他(ta)人隨意移(yi)動(dong)杠桿(gan)式安全閥(fa)(fa)(fa)(fa)(fa)(fa)的(de)(de)重(zhong)錘或擰動(dong)彈簧式安全閥(fa)(fa)(fa)(fa)(fa)(fa)的(de)(de)調節(jie)螺(luo)絲；

安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)的(de)(de)(de)(de)(de)選(xuan)(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)(yong)(yong)原則：1、蒸汽鍋爐安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)，一般(ban)(ban)(ban)選(xuan)(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)(yong)(yong)敞(chang)開(kai)全(quan)(quan)(quan)啟(qi)(qi)式彈簧(huang)(huang)(huang)安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)0490系列；2、液(ye)體(ti)介質(zhi)(zhi)用(yong)(yong)(yong)(yong)(yong)(yong)安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)，一般(ban)(ban)(ban)選(xuan)(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)(yong)(yong)微啟(qi)(qi)式彈簧(huang)(huang)(huang)安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)0485系列；3、空氣(qi)或其他氣(qi)體(ti)介質(zhi)(zhi)用(yong)(yong)(yong)(yong)(yong)(yong)安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)，一般(ban)(ban)(ban)選(xuan)(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)(yong)(yong)全(quan)(quan)(quan)啟(qi)(qi)式彈簧(huang)(huang)(huang)安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)；4、液(ye)化石油氣(qi)汽車(che)槽車(che)或液(ye)化石油氣(qi)鐵路(lu)罐車(che)用(yong)(yong)(yong)(yong)(yong)(yong)安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)，一般(ban)(ban)(ban)選(xuan)(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)(yong)(yong)全(quan)(quan)(quan)啟(qi)(qi)式內裝安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)；5、采(cai)油井出(chu)口用(yong)(yong)(yong)(yong)(yong)(yong)安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)，一般(ban)(ban)(ban)選(xuan)(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)(yong)(yong)先導式安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)；6、蒸汽發電設備(bei)的(de)(de)(de)(de)(de)高壓(ya)(ya)旁(pang)路(lu)安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)，一般(ban)(ban)(ban)選(xuan)(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)(yong)(yong)具有(you)安(an)(an)(an)(an)(an)全(quan)(quan)(quan)和控制雙重功能的(de)(de)(de)(de)(de)先導式安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)7、若要求對安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)做定期開(kai)啟(qi)(qi)試驗時，應選(xuan)(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)(yong)(yong)帶提升扳手的(de)(de)(de)(de)(de)安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)。當介質(zhi)(zhi)壓(ya)(ya)力達到開(kai)啟(qi)(qi)壓(ya)(ya)力的(de)(de)(de)(de)(de)75%以(yi)上時，可利用(yong)(yong)(yong)(yong)(yong)(yong)提升扳手將閥(fa)瓣從閥(fa)座上略為提起，以(yi)檢(jian)查安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)開(kai)啟(qi)(qi)的(de)(de)(de)(de)(de)靈活(huo)性；8、若介質(zhi)(zhi)溫度較(jiao)高時，為了降低彈簧(huang)(huang)(huang)腔室的(de)(de)(de)(de)(de)溫度，一般(ban)(ban)(ban)當封閉式安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)使(shi)用(yong)(yong)(yong)(yong)(yong)(yong)溫度超過300℃及敞(chang)開(kai)式安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)使(shi)用(yong)(yong)(yong)(yong)(yong)(yong)溫度超過350℃時，應選(xuan)(xuan)(xuan)(xuan)用(yong)(yong)(yong)(yong)(yong)(yong)帶散熱(re)器(qi)的(de)(de)(de)(de)(de)安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)。排放管要直(zhi)通(tong)安(an)(an)(an)(an)(an)全(quan)(quan)(quan)地點，并有(you)足夠的(de)(de)(de)(de)(de)流(liu)通(tong)截面積，保證排汽暢通(tong)。畢節通(tong)用(yong)(yong)(yong)(yong)(yong)(yong)安(an)(an)(an)(an)(an)全(quan)(quan)(quan)閥(fa)檢(jian)測

安全閥與鍋爐或壓(ya)力容器之間的(de)連接管和(he)管件的(de)通(tong)孔；在線安全閥熱態校驗

安(an)(an)全(quan)(quan)(quan)(quan)(quan)(quan)閥(fa)(fa)(fa)(fa)(fa)用(yong)(yong)(yong)于加壓(ya)(ya)設(she)備(bei)、容器或(huo)(huo)(huo)(huo)(huo)管道(dao)，作(zuo)為過(guo)壓(ya)(ya)保(bao)護(hu)裝置(zhi)。當設(she)備(bei)、容器或(huo)(huo)(huo)(huo)(huo)管道(dao)內(nei)的(de)(de)(de)(de)(de)壓(ya)(ya)力(li)上(shang)升(sheng)超過(guo)允許(xu)(xu)值時(shi)，閥(fa)(fa)(fa)(fa)(fa)門(men)自動(dong)(dong)(dong)開(kai)(kai)啟(qi)(qi)，然(ran)(ran)后(hou)滿量排放，防止設(she)備(bei)、容器或(huo)(huo)(huo)(huo)(huo)管道(dao)內(nei)的(de)(de)(de)(de)(de)壓(ya)(ya)力(li)持續上(shang)升(sheng)；當壓(ya)(ya)力(li)降至規(gui)定值時(shi)，閥(fa)(fa)(fa)(fa)(fa)門(men)應(ying)(ying)自動(dong)(dong)(dong)及時(shi)關(guan)(guan)閉，以(yi)(yi)(yi)(yi)保(bao)護(hu)設(she)備(bei)、容器或(huo)(huo)(huo)(huo)(huo)管道(dao)的(de)(de)(de)(de)(de)安(an)(an)全(quan)(quan)(quan)(quan)(quan)(quan)運行。安(an)(an)全(quan)(quan)(quan)(quan)(quan)(quan)閥(fa)(fa)(fa)(fa)(fa)可(ke)以(yi)(yi)(yi)(yi)由(you)閥(fa)(fa)(fa)(fa)(fa)門(men)入口處的(de)(de)(de)(de)(de)系統壓(ya)(ya)力(li)直(zhi)接驅動(dong)(dong)(dong)。在(zai)這(zhe)種(zhong)情況(kuang)下，彈簧或(huo)(huo)(huo)(huo)(huo)重錘提供的(de)(de)(de)(de)(de)機械載荷克服(fu)了作(zuo)用(yong)(yong)(yong)在(zai)閥(fa)(fa)(fa)(fa)(fa)瓣下的(de)(de)(de)(de)(de)介質壓(ya)(ya)力(li)。它(ta)們也可(ke)以(yi)(yi)(yi)(yi)通(tong)過(guo)釋放或(huo)(huo)(huo)(huo)(huo)施加關(guan)(guan)閉力(li)來(lai)打(da)開(kai)(kai)或(huo)(huo)(huo)(huo)(huo)關(guan)(guan)閉安(an)(an)全(quan)(quan)(quan)(quan)(quan)(quan)閥(fa)(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)機構來(lai)引導。因此(ci)，根據上(shang)述(shu)驅動(dong)(dong)(dong)方(fang)式，安(an)(an)全(quan)(quan)(quan)(quan)(quan)(quan)閥(fa)(fa)(fa)(fa)(fa)分(fen)為直(zhi)動(dong)(dong)(dong)式和(he)(he)先導式。安(an)(an)全(quan)(quan)(quan)(quan)(quan)(quan)閥(fa)(fa)(fa)(fa)(fa)可(ke)以(yi)(yi)(yi)(yi)在(zai)整個開(kai)(kai)啟(qi)(qi)高度(du)范圍(wei)或(huo)(huo)(huo)(huo)(huo)大開(kai)(kai)啟(qi)(qi)高度(du)范圍(wei)內(nei)按比例開(kai)(kai)啟(qi)(qi)，也可(ke)以(yi)(yi)(yi)(yi)只在(zai)小開(kai)(kai)啟(qi)(qi)高度(du)范圍(wei)內(nei)按比例開(kai)(kai)啟(qi)(qi)，然(ran)(ran)后(hou)突然(ran)(ran)開(kai)(kai)啟(qi)(qi)到(dao)全(quan)(quan)(quan)(quan)(quan)(quan)開(kai)(kai)位置(zhi)。因此(ci)，安(an)(an)全(quan)(quan)(quan)(quan)(quan)(quan)閥(fa)(fa)(fa)(fa)(fa)可(ke)以(yi)(yi)(yi)(yi)分(fen)為比例型和(he)(he)全(quan)(quan)(quan)(quan)(quan)(quan)開(kai)(kai)型。安(an)(an)全(quan)(quan)(quan)(quan)(quan)(quan)閥(fa)(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)結構、應(ying)(ying)用(yong)(yong)(yong)和(he)(he)標稱(cheng)通(tong)道(dao)的(de)(de)(de)(de)(de)確定應(ying)(ying)受規(gui)范約束或(huo)(huo)(huo)(huo)(huo)經法定機構批準。不(bu)同規(gui)范之間(jian)的(de)(de)(de)(de)(de)限制性條款(kuan)和(he)(he)相關(guan)(guan)定義(yi)可(ke)能不(bu)同。當應(ying)(ying)用(yong)(yong)(yong)安(an)(an)全(quan)(quan)(quan)(quan)(quan)(quan)閥(fa)(fa)(fa)(fa)(fa)時(shi)，必(bi)須遵(zun)循其適用(yong)(yong)(yong)規(gui)范的(de)(de)(de)(de)(de)要(yao)求。由(you)于安(an)(an)全(quan)(quan)(quan)(quan)(quan)(quan)閥(fa)(fa)(fa)(fa)(fa)是自動(dong)(dong)(dong)閥(fa)(fa)(fa)(fa)(fa)，所以(yi)(yi)(yi)(yi)安(an)(an)全(quan)(quan)(quan)(quan)(quan)(quan)閥(fa)(fa)(fa)(fa)(fa)在(zai)結構和(he)(he)性能參數上(shang)與一(yi)般閥(fa)(fa)(fa)(fa)(fa)門(men)有許(xu)(xu)多不(bu)同。在(zai)線安(an)(an)全(quan)(quan)(quan)(quan)(quan)(quan)閥(fa)(fa)(fa)(fa)(fa)熱態校(xiao)驗