視(shi)(shi)(shi)鏡(jing)(jing)(jing)有兩種(zhong)種(zhong)：閥(fa)門(men)(men)(men)視(shi)(shi)(shi)鏡(jing)(jing)(jing)，汽車視(shi)(shi)(shi)鏡(jing)(jing)(jing)；我們生產(chan)的(de)視(shi)(shi)(shi)鏡(jing)(jing)(jing)主(zhu)要是閥(fa)門(men)(men)(men)視(shi)(shi)(shi)鏡(jing)(jing)(jing)，視(shi)(shi)(shi)鏡(jing)(jing)(jing)在管(guan)道中(zhong)一般(ban)應(ying)當水平安(an)(an)裝。閥(fa)門(men)(men)(men)視(shi)(shi)(shi)鏡(jing)(jing)(jing)可用(yong)于溫度高，腐(fu)蝕性(xing)強(qiang)、易(yi)中(zhong)毒、危險性(xing)較大(da)，易(yi)結晶的(de)化工(gong)(gong)塔(ta)器、管(guan)道上，儲罐上、過(guo)濾器上、人孔上等等，方(fang)便觀察(cha)流體以(yi)保(bao)證其安(an)(an)全生產(chan)。閥(fa)門(men)(men)(men)視(shi)(shi)(shi)鏡(jing)(jing)(jing)主(zhu)要由(you)(you)視(shi)(shi)(shi)鏡(jing)(jing)(jing)底(di)板、視(shi)(shi)(shi)鏡(jing)(jing)(jing)玻(bo)璃(li)(li)(li)、閥(fa)門(men)(men)(men)組件等組成。安(an)(an)裝尺寸小，而(er)且(qie)驅動力(li)矩小，操(cao)作(zuo)(zuo)簡便、迅(xun)速(su)，并且(qie)還同時(shi)具有良好的(de)流量調節(jie)功(gong)能(neng)和關閉密封特(te)性(xing)，視(shi)(shi)(shi)鏡(jing)(jing)(jing)在大(da)中(zhong)口徑、中(zhong)低(di)壓力(li)的(de)使用(yong)領域，它是主(zhu)導的(de)視(shi)(shi)(shi)鏡(jing)(jing)(jing)形式。尿素生產(chan)過(guo)程中(zhong)，在帶視(shi)(shi)(shi)鏡(jing)(jing)(jing)的(de)中(zhong)低(di)壓塔(ta)器內，由(you)(you)于工(gong)(gong)作(zuo)(zuo)溫度高，液體腐(fu)蝕性(xing)強(qiang)的(de)特(te)點(dian)，容(rong)易(yi)造成液面計視(shi)(shi)(shi)鏡(jing)(jing)(jing)玻(bo)璃(li)(li)(li)損壞，視(shi)(shi)(shi)鏡(jing)(jing)(jing)底(di)板變形，而(er)且(qie)在安(an)(an)裝視(shi)(shi)(shi)鏡(jing)(jing)(jing)玻(bo)璃(li)(li)(li)過(guo)程中(zhong)，有時(shi)因(yin)受力(li)不均勻，易(yi)造成視(shi)(shi)(shi)鏡(jing)(jing)(jing)玻(bo)璃(li)(li)(li)破(po)裂(lie)。如果(guo)沒有及時(shi)發現(xian)，開車后必然發生泄漏，這(zhe)時(shi)就必須(xu)全系(xi)統停車進行(xing)熱洗更(geng)換(huan)。這(zhe)樣不但給系(xi)統長周期(qi)安(an)(an)全運行(xing)帶來困(kun)難，而(er)且(qie)嚴重(zhong)影響尿素生產(chan)的(de)效率(lv)。如果(guo)視(shi)(shi)(shi)鏡(jing)(jing)(jing)泄漏或視(shi)(shi)(shi)鏡(jing)(jing)(jing)玻(bo)璃(li)(li)(li)損壞，可先(xian)關閉底(di)板上的(de)閥(fa)門(men)(men)(men)，這(zhe)樣既起到(dao)(dao)不停車就可更(geng)換(huan)視(shi)(shi)(shi)鏡(jing)(jing)(jing)玻(bo)璃(li)(li)(li)的(de)目的(de)，又能(neng)夠保(bao)證生產(chan)的(de)正(zheng)常(chang)進行(xing)，而(er)且(qie)操(cao)作(zuo)(zuo)人員的(de)人身(shen)安(an)(an)全及工(gong)(gong)作(zuo)(zuo)環境(jing)安(an)(an)全也得到(dao)(dao)了保(bao)障。