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JAV-1夾套呼吸閥安裝在儲罐(guan)(guan)頂部，既有(you)(you)保(bao)溫(wen)功能又(you)解決罐(guan)(guan)內(nei)(nei)正(zheng)壓，負(fu)壓的氣(qi)體(ti)(ti)(ti)，使罐(guan)(guan)內(nei)(nei)的液體(ti)(ti)(ti)進出沒有(you)(you)受到阻礙，當外(wai)液體(ti)(ti)(ti)輸入罐(guan)(guan)內(nei)(nei)時(shi)(shi)(shi)有(you)(you)大量的氣(qi)體(ti)(ti)(ti)往外(wai)呼（稱(cheng)正(zheng)壓）。如罐(guan)(guan)內(nei)(nei)液體(ti)(ti)(ti)往外(wai)輸出時(shi)(shi)(shi)罐(guan)(guan)內(nei)(nei)必(bi)須(xu)從外(wai)空氣(qi)吸進罐(guan)(guan)內(nei)(nei)（稱(cheng)負(fu)壓）。如停止工作時(shi)(shi)(shi)呼吸閥自動關(guan)閉不會把罐(guan)(guan)內(nei)(nei)液氣(qi)往外(wai)泄(xie)漏，使罐(guan)(guan)內(nei)(nei)的液體(ti)(ti)(ti)質量得到了有(you)(you)利(li)的保(bao)障。