安全閥與特殊結構安全閥的選用

點擊數：17062016-09-30 09:23:39　來源: 閥門|管件|真空破壞閥|汽水分離器|管道連接件|邯鄲市源諾閥門管件制造有限公司|邯鄲閥門管件生產廠家

    安(an)(an)全(quan)閥是一種(zhong)用(yong)(yong)于(yu)受壓設備，容器或管路上的(de)自動(dong)壓力釋(shi)放(fang)裝置(zhi)。當(dang)被(bei)保(bao)護系(xi)統內的(de)壓力升高超(chao)過允許值時，閥門(men)自動(dong)開啟，排出(chu)部分多余的(de)介質，以(yi)防止系(xi)統壓力繼續升高，當(dang)系(xi)統壓力降低到某規定值時，閥門(men)由能自動(dong)關閉，從(cong)而保(bao)證系(xi)統正常運(yun)行。如何正確選用(yong)(yong)安(an)(an)全(quan)閥直接關系(xi)到使用(yong)(yong)單(dan)位(wei)的(de)經濟效益和操作人員及設備的(de)安(an)(an)全(quan)，下面(mian)概略介紹(shao)安(an)(an)全(quan)閥選用(yong)(yong)的(de)幾個要點： 

    1、工(gong)(gong)(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)級(ji)（壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)等級(ji)）的(de)(de)(de)(de)確定(ding)。 安(an)全閥的(de)(de)(de)(de)工(gong)(gong)(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)與工(gong)(gong)(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)以及彈(dan)簧的(de)(de)(de)(de)工(gong)(gong)(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)級(ji)有著不同的(de)(de)(de)(de)含(han)義，不能(neng)混(hun)為一談。工(gong)(gong)(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)是指(zhi)安(an)全閥正常運行時閥前所(suo)承受的(de)(de)(de)(de)靜壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)，它與被保護系統(tong)或設(she)備的(de)(de)(de)(de)工(gong)(gong)(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)相同。而彈(dan)簧的(de)(de)(de)(de)工(gong)(gong)(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)級(ji)則(ze)是指(zhi)某一根彈(dan)簧所(suo)允許使(shi)用的(de)(de)(de)(de)工(gong)(gong)(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)范圍，在該壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)范圍內，安(an)全閥的(de)(de)(de)(de)開啟壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)（即(ji)整定(ding)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)）可以通過改變彈(dan)簧的(de)(de)(de)(de)預緊壓(ya)(ya)(ya)(ya)縮(suo)量進行調節。同一公稱壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)的(de)(de)(de)(de)安(an)全閥，根據彈(dan)簧設(she)計(ji)要(yao)求(qiu)，可以分(fen)(fen)為多種(zhong)不同的(de)(de)(de)(de)工(gong)(gong)(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)級(ji)。劃(hua)分(fen)(fen)的(de)(de)(de)(de)前提是能(neng)足以保證(zheng)各個工(gong)(gong)(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)級(ji)的(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)力(li)(li)(li)(li)上限(xian)與下限(xian)均能(neng)符合有關標準所(suo)規(gui)定(ding)的(de)(de)(de)(de)動作(zuo)(zuo)性能(neng)指(zhi)標。 

    2、一般安全閥(fa)訂貨須知：訂購一般安全閥(fa)應注明下列各項內容a安全閥(fa)的型號、公稱通(tong)徑、公稱壓力(li)b安全閥(fa)的工作壓力(li)級或開啟(qi)壓力(li)（整(zheng)定壓力(li)）值c閥(fa)體(ti)材質及(ji)密封面材質。 

     3、特殊規格安全(quan)(quan)閥(fa)(fa)(fa)訂貨(huo)須知(zhi)：訂購特殊安全(quan)(quan)閥(fa)(fa)(fa)時，除應注(zhu)明安全(quan)(quan)閥(fa)(fa)(fa)的(de)型(xing)(xing)號、公稱通徑以及(ji)(ji)(ji)開啟(qi)(qi)壓(ya)(ya)力之(zhi)外(wai)，尚(shang)需注(zhu)明以下各項(xiang)：安全(quan)(quan)閥(fa)(fa)(fa)排(pai)放壓(ya)(ya)力的(de)最(zui)高值(zhi)及(ji)(ji)(ji)回(hui)座(zuo)壓(ya)(ya)力（或(huo)啟(qi)(qi)閉壓(ya)(ya)差）最(zui)低值(zhi)；被保護系統或(huo)設備的(de)必(bi)須排(pai)量(liang)及(ji)(ji)(ji)擬裝設閥(fa)(fa)(fa)門的(de)數量(liang)；使用介(jie)質(zhi)(zhi)及(ji)(ji)(ji)其重度（液(ye)體）或(huo)分子(zi)量(liang)（氣(qi)體）；閥(fa)(fa)(fa)門進口介(jie)質(zhi)(zhi)溫度；閥(fa)(fa)(fa)門承受背壓(ya)(ya)的(de)類型(xing)(xing)及(ji)(ji)(ji)數值(zhi)；其他要求。