公稱通徑：DN25-DN400
公稱壓力：0.6Mpa-4.0Mpa
適用溫度：-30℃~65℃
適用介質：汽油、煤油、柴油等其它石化化工物料
閥體材質：鑄鋼、碳鋼、不銹鋼、鋁合金
連接方式：法蘭連接
制造標準：GB5908-86；SY7511-87
法蘭標準：HG20592-97；JB/T78-94
檢驗標準：SY/T0511-1996《石(shi)油儲罐呼吸閥》；API2000 

GFQ-2全(quan)天(tian)候呼(hu)吸(xi)閥安裝在儲(chu)罐(guan)(guan)(guan)(guan)頂部，是解決罐(guan)(guan)(guan)(guan)內(nei)(nei)正(zheng)壓(ya)，負壓(ya)的氣(qi)體(ti)(ti)，使罐(guan)(guan)(guan)(guan)內(nei)(nei)的液(ye)體(ti)(ti)進出沒(mei)有(you)(you)受到阻礙，當外液(ye)體(ti)(ti)輸(shu)入罐(guan)(guan)(guan)(guan)內(nei)(nei)時(shi)(shi)有(you)(you)大量的氣(qi)體(ti)(ti)往外呼(hu)(稱正(zheng)壓(ya))。如(ru)罐(guan)(guan)(guan)(guan)內(nei)(nei)液(ye)體(ti)(ti)往外輸(shu)出時(shi)(shi)罐(guan)(guan)(guan)(guan)內(nei)(nei)必須(xu)從外空氣(qi)吸(xi)進罐(guan)(guan)(guan)(guan)內(nei)(nei)(稱負壓(ya))。如(ru)停止(zhi)工作時(shi)(shi)呼(hu)吸(xi)閥自動關閉不會把罐(guan)(guan)(guan)(guan)內(nei)(nei)液(ye)氣(qi)往外泄漏，使罐(guan)(guan)(guan)(guan)內(nei)(nei)的液(ye)體(ti)(ti)質(zhi)量得(de)到了有(you)(you)利的保障。全(quan)天(tian)候呼(hu)吸(xi)閥殼體(ti)(ti)選用不銹鋼(gang)(gang)、鑄鋼(gang)(gang)和鋁合金，耐腐(fu)蝕性好；適用于(yu)(yu)儲(chu)存閃點低(di)(di)于(yu)(yu)28 ℃的甲類油(you)品和閃點低(di)(di)于(yu)(yu)60 ℃的乙類油(you)品，如(ru)汽(qi)油(you)、笨(ben)、甲笨(ben)、煤油(you)、輕柴油(you)、機油(you)、原油(you)等油(you)品及(ji)性質(zhi)相同的化(hua)工產品儲(chu)罐(guan)(guan)(guan)(guan)。