一、DQ911F電動(dong)低溫(wen)球(qiu)閥,DQ941F低溫(wen)電動(dong)球(qiu)閥的基(ji)本介紹：

DQ911F電(dian)(dian)動(dong)(dong)(dong)低溫球閥(fa),DQ941F低溫電(dian)(dian)動(dong)(dong)(dong)球閥(fa)由電(dian)(dian)動(dong)(dong)(dong)執行器、球閥(fa)和特質(zhi)加長桿組(zu)合而成，主要用于輸(shu)出液(ye)(ye)態(tai)(tai)低溫介質(zhi)如LNG（液(ye)(ye)化(hua)天然氣）LO2（液(ye)(ye)態(tai)(tai)氧(yang)氣）LN2（液(ye)(ye)氮(dan)）LAR（燃料(liao)）液(ye)(ye)化(hua)石油產品等。電(dian)(dian)動(dong)(dong)(dong)低溫球閥(fa)在選配的時(shi)候可以選用CHR、3810R、DZW、HQ、PSQ的電(dian)(dian)動(dong)(dong)(dong)執行器配上電(dian)(dian)源電(dian)(dian)壓（220V/50HZ）、（380V/50HZ）、輸(shu)入信號4~20mA或者1-5V-DC或者輸(shu)出信號4~20Ma-dc，來取代(dai)人工的開關調節(jie)操作。

DQ911F電動(dong)(dong)低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)球(qiu)閥(fa)(fa),DQ941F低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)電動(dong)(dong)球(qiu)閥(fa)(fa)分為低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)浮動(dong)(dong)球(qiu)閥(fa)(fa)和(he)(he)低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)固(gu)定球(qiu)閥(fa)(fa)兩類,對于溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)高(gao)于-50℃,一般(ban)不采用長頸(jing)(jing)結構(gou),對于溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)低(di)于-50℃的(de)(de)(de)球(qiu)閥(fa)(fa),頸(jing)(jing)部長度(du)一般(ban)為250mm,或根(gen)據設計和(he)(he)計算(suan)確定。電動(dong)(dong)低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)球(qiu)閥(fa)(fa)主要用于輸出液態(tai)低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)介(jie)質如乙(yi)烯、液氧、液氫、液化(hua)天然氣、液化(hua)石油產品等(deng)，不但易燃易爆(bao)，而且在升溫(wen)(wen)(wen)(wen)(wen)(wen)時(shi)要氣化(hua)，氣化(hua)時(shi)，體積膨脹數百倍。電動(dong)(dong)低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)球(qiu)閥(fa)(fa)的(de)(de)(de)材(cai)(cai)料(liao)非常重要，材(cai)(cai)質不合格(ge)，會造成(cheng)殼(ke)體及(ji)密封面(mian)的(de)(de)(de)外漏或內漏；零(ling)部件的(de)(de)(de)綜合機械性(xing)能、強度(du)和(he)(he)鋼度(du)滿足不了使用要求甚至斷(duan)裂。導(dao)(dao)致液化(hua)天然氣介(jie)質泄(xie)漏引起爆(bao)炸。電動(dong)(dong)低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)球(qiu)閥(fa)(fa)經特殊(shu)的(de)(de)(de)低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)處理(li)，將粗加工的(de)(de)(de)零(ling)件置于冷卻介(jie)質中(zhong)數小(xiao)時(shi)(2-6小(xiao)時(shi))，以(yi)釋(shi)放(fang)應(ying)力，確保(bao)材(cai)(cai)料(liao)的(de)(de)(de)低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)性(xing)能，保(bao)證精加工尺寸(cun)，以(yi)防閥(fa)(fa)門在低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)工況時(shi)，因溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)變(bian)化(hua)造成(cheng)變(bian)形而導(dao)(dao)致的(de)(de)(de)泄(xie)漏。

二(er)、DQ911F電動(dong)低溫(wen)球(qiu)閥,DQ941F低溫(wen)電動(dong)球(qiu)閥的詳(xiang)細參數：

通用型號：DQ941F法蘭  DQ961F焊接

閥門通(tong)徑：DN15mm～DN1200 mm （ 1/2～48" ）

壓力等級(ji)：1.6MPa~45MPa、150LB~2500LB

閥(fa)門材(cai)料(liao)：LCB、LC3、CF8。

工作溫(wen)度(du)：-46℃、-101℃、 -196℃、-253℃

適用介質(zhi)：LO2、LNG、LAR、LPG

連(lian)結形式(shi)：法蘭(lan)式(shi)、焊(han)接(jie)式(shi)、螺紋。

驅動方式(shi)：電(dian)(dian)動 （智(zhi)能(neng)調(diao)節型電(dian)(dian)動執行(xing)器(qi)）(防爆型電(dian)(dian)動執行(xing)器(qi))

三、DQ911F電動(dong)低(di)溫(wen)球(qiu)閥(fa)(fa),DQ941F低(di)溫(wen)電動(dong)球(qiu)閥(fa)(fa)的低(di)溫(wen)處(chu)理(li)：

由(you)于(yu)低(di)溫(wen)介質(zhi)比較特別，不但易燃易爆，而(er)(er)且在(zai)升(sheng)溫(wen)時(shi)要氣(qi)化，氣(qi)化時(shi)，體(ti)積(ji)膨脹(zhang)數(shu)百倍，所(suo)(suo)以電(dian)動低(di)溫(wen)球閥經特殊的(de)(de)低(di)溫(wen)處理，在(zai)制造過程(cheng)將零件浸入低(di)溫(wen)-196℃的(de)(de)液氮中保(bao)冷2至6小時(shi)后取出自然處理，重復(fu)循環2次(ci)，減少溫(wen)差(cha)和金相組織改變而(er)(er)產生(sheng)變形，提高閥門(men)在(zai)低(di)溫(wen)時(shi)的(de)(de)密(mi)封性(xing)，增加(jia)了工件的(de)(de)硬度，使加(jia)工時(shi)做(zuo)到(dao)精密(mi)，電(dian)動低(di)溫(wen)球閥是用(yong)于(yu)易燃介質(zhi)的(de)(de)閥門(men)所(suo)(suo)以也需防靜電(dian)設計。