安全閥的防護措施,止回閥的防護措施,蒸汽疏水閥的防護措施 - 廣州富山閥門有限公司_威客电竞

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安全閥 止回閥 蒸汽疏水閥的防護措施

2015-09-18 10:00:47| 發布者: 廣州富山閥門有限公司| 查看: 1630

1.安全閥的防護設施

  一般情況下,安全閥前後不設置隔斷閥,隻有在個别情況下,安全閥前後才設置隔斷閥。如介質中含有固體雜質,影響安全閥起跳後不能關嚴時,要在安全閥前面安裝一隻帶鉛封的閘閥。應在全開位置,閘閥與安全閥之間裝設一隻通徑大氣的DN20的檢查閥。
  對于安全閥洩放的蠟、酚等介質在常溫下為固體狀态時,或減壓汽化而使輕質液态烴等介質溫度低于0度時,安全閥需加蒸伴熱。
  對用于腐蝕性介質的安全閥,視閥門耐蝕性能考慮在閥進口處加耐腐蝕的防爆膜。
  氣體安全閥一般按其通徑設置一個旁路閥,作為手動放空用。
2.止回閥的防護設施
  為了防止止回閥洩漏或失效後介質倒流,止回閥前後應設置一個或兩個切斷閥。如果設置兩個切斷閥,可便于止回閥拆卸下來維修。
3.蒸汽疏水閥的防護設施
  蒸汽疏水閥有帶旁通管和不帶旁通管之分;有凝結水回收和凝結不回收之分。排水量大以及其他特殊要求的蒸汽疏水閥,可采用并聯形式的安裝設施。
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