A44Y-16/25/40C型(xing)帶扳手彈簧全啟封閉式(shi)安(an)全閥(fa)適用于工(gong)(gong)作(zuo)溫(wen)度≤300℃的空氣、蒸汽、石(shi)油(you)等(deng)介(jie)質的設備和管(guan)路(lu)上，A44Y-16/25/40P/R型(xing)帶扳手彈簧全啟封閉式(shi)安(an)全閥(fa)適用于工(gong)(gong)作(zuo)溫(wen)度≤200℃有腐蝕性介(jie)質的設備上，作(zuo)為超壓保(bao)護裝(zhuang)置。