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安全閥是承壓設(shè)備、容器和管路上的超壓保護(hù)裝置，當(dāng)介質(zhì)壓力升高超過允許值時(shí)，安全閥自動(dòng)開啟，繼而全量（或微量）排放，防止壓力繼續(xù)升高，當(dāng)壓力降低至規(guī)定值時(shí)，安全閥及時(shí)自動(dòng)關(guān)閉。
安全閥設(shè)計(jì)、制造、驗(yàn)收技術(shù)標(biāo)準(zhǔn)符合GB/T12243-2005的要求。
封閉式安全閥的閥蓋是封閉的，利于防止灰塵和雜物侵入，及防止有毒或易燃介質(zhì)溢出；開放式安全閥由于閥蓋敞開，利于降低彈簧腔室的溫度，主要用于蒸汽介質(zhì)管道及容器，帶散熱器安全閥主要適用于介質(zhì)溫度超過350℃的工況。
帶扳手彈簧式安全閥當(dāng)介質(zhì)壓力達(dá)到開啟壓力的75％以上時(shí)，能利用扳手手動(dòng)開啟。
全啟式安全閥開啟高度≥1/4流道直徑，排放量大，微啟式安全閥開啟高度為1/20 ～1/40流道直徑。
Brief Description Of Safety Valve
Safety valve is a pressure equipment, container and pipeline optimal overpressure protection device, when the medium pressure rise exceeds the allowable value, the valve automatically opens, then the whole amount (or trace) emissions to prevent the pressure continues to rise, when the pressure is reduced to the specified value, the safety valve timely and automatically closes.
Safety valve design, manufacturing, and acceptance of technical standards in accordance with the requirements of GB/T12243-2005.
Closed type safety valve of the valve cover is closed, to prevent the intrusion of dust and debris, and prevent toxic or flammable medium overflow; open type safety valve because the valve cap is open, to reduce the temperature of the spring chamber, mainly for steam medium piping and vessel, safety valve with radiator is mainly used in medium temperature more than 350 DEG C condition.
Spring type safety valve with a wrench when the medium pressure to open more than 75% of the pressure, can use a wrench to manually open.
Full Kai type safety valve opening height is greater than or equal to 1 / 4 runner diameter, emissions from large, enlight type safety valve opening height is 1 / 20 to 40 runner diameter.
