304不銹(xiu)鋼法蘭逆止(zhi)閥?適用于(yu)公(gong)稱壓(ya)力PN1.6~16.0Mpa,工(gong)(gong)作溫度(du)-29~550℃的石油、化(hua)工(gong)(gong)、制藥、化(hua)肥(fei)、電力行(xing)業等各種工(gong)(gong)況(kuang)的管(guan)道上,切斷或接通介(jie)質。適用介(jie)質為:水(shui)、油品、蒸(zheng)汽、酸性介(jie)質等。依靠介(jie)質本身流動而(er)自動開、閉(bi)閥瓣,用來防止(zhi)介(jie)質倒流的不銹(xiu)鋼閥門,又稱逆止(zhi)閥、單向閥、逆流閥、和背(bei)壓(ya)閥。止(zhi)