安全閥、穩壓閥、減壓閥、洩壓閥的區别與不同

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安全閥、穩壓閥、減壓閥、洩壓閥的區别與不同
發布時間:2019-12-04 11:34:12 點擊浏覽:
閥門根據其種類和用途有不同的要求,主要有密封、強度、調節、流通、啟閉等性能。在設計和選用閥門時,傑克龍閥門除了要考慮基本參數和性能外,還要考慮流體的性能,包括流體的相态(氣體、液體或含固體顆粒)、腐蝕性、粘度、毒性、易燃易爆性,貴重稀有程度和放射性等。
 
    減壓閥是将壓力高的介質降為壓力低的介質的設備,該閥的特點,是在進口壓力不斷變化的情況下,保持出口聽壓力和溫度值在一定的範圍内。減壓閥:無論進口壓力如何變化,都把出口壓力減到額定值,起到減壓作用。減壓閥是将介質壓力降低到一定數值的自動閥門, 一般閥後壓力要小于閥前壓力的50% 。減壓閥種類很多, 主要有活塞式和彈簧薄膜式兩種。活塞式減壓閥是通過活塞的作用進行減壓的閥門。彈簧薄膜式減壓閥, 是依靠彈簧和薄膜來進行壓力平衡的。
 
     安全閥用以防止鍋爐、壓力容器等設備或管道因超壓而發生損壞的閥門。當壓力略高于正常工作壓力時,安全閥自動開啟,使壓力下降。當壓力略低于正常工作壓力時,安全閥自動關閉,停止排放流體并保持密封。
 

 
    洩壓閥主要是用在壓力過大的場合,當壓力大于設定值時閥内片被頂開及時釋放壓力,壓力減小後恢複到原來的位置,和安全閥區别不大,洩壓閥多指用于液體的,安全閥多指用于氣體,蒸汽的。
 
     穩壓閥是将一個區域内的介質保持在一定的壓力範圍的設備。和減壓閥的區别:穩壓閥:無論下遊壓力和需求量如何變化,都維持一個恒定的上遊壓力。
 
    安全閥及減壓閥是兩種閥門類型,是專用閥門。其中,安全閥屬于安全洩發裝置,是專用閥門,隻在工作壓力超過允許範圍時動作,對系統起到保護作用。減壓閥屬于工藝閥門,可使高壓物流減壓,以滿足後系統對壓力的要求,其工作過程是連續的,當容器壓力超過設計規定時,安全閥自動開啟,排出氣體降低器内的過高壓,防止容器或管線破壞。而當容器内的壓力降至正常操作壓力時,即自動關閉避免因容器超壓排出全部氣體,從而造成浪費和生産中斷。
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