不銹鋼截止閥J41W_鍋爐排污_截止閥
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- 請求信息 : 2023-02-25 03:09:53 HTTP/1.1 GET : http://www.cqsenpu.com/product/globe_valve/002-000483.html
- 運行時間 : 0.467566s [ 吞吐率:2.14req/s ] 內存消耗:5,717.92kb 文件加載:241
- 查詢信息 : 239 queries
- 緩存信息 : 0 reads,1 writes
- 會話信息 : SESSION_ID=040b7e098684ac402b255fa5fca04f97
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鍋爐排污是定期排出鍋爐內部分被鹽質和水渣污染的鍋水。廣泛應用于傳統的冶金、新型煤化工、大型氮肥、專業氣體供應等領域。進入汽包的給水總是含有一定量的鹽。在鍋爐中加藥后,鍋爐水中的結垢物質轉化為水渣。另外,當鍋爐水腐蝕金屬時,會產生一些腐蝕產物。因此,鍋爐水中有各種可溶和不可溶的雜質。在鍋爐運行中,這些雜質中只有少數被蒸汽帶走,大部分留在鍋爐水中。隨著鍋爐水的不斷蒸發,這些雜質的濃度逐漸增加。歐拉姆閥門的不銹鋼截止閥具有復合材料超強抗腐,減弱介質沖擊。
不銹鋼截止閥是一種強制密封閥,所以當閥門關閉時,必須對閥瓣施加壓力,以迫使密封面不泄漏。當介質從閥瓣下面進入閥門時,操作力需要克服的阻力是閥桿與填料之間的摩擦力和介質壓力產生的推力。關閥的力要大于開閥的力,所以閥桿的直徑要大一些,否則閥桿會彎曲。近年來,自密封閥出現以來,不銹鋼截止閥的介質流向從閥瓣上方變為閥腔內。此時,在介質壓力的作用下,閉閥力較小,但開閥力較大,可相應減小閥桿直徑。同時,在介質的作用下,這種閥門也是緊密的。我國的“三合一”閥門曾規定不銹鋼截止閥的流向應為自上而下。
不銹鋼截止閥,也叫截門,是使用最廣泛的一種閥門,它之所以廣受歡迎,是由于開閉過程中密封面之間摩擦力小,比較耐用,開啟高度不大,制造容易,維修方便,不僅適用于中 低壓,而且適用于高壓。 不銹鋼截止閥的閉合原理是,依靠閥杠壓力,使閥瓣密封面與閥座密封面緊密貼合,阻止介質流通。 不銹鋼截止閥只許介質單向流動,安裝時有方向性。不銹鋼截止閥的結構 長度大于閘閥,同時流體阻力大,長期運行時,密封可靠性 不強。
結構比閘閥簡單,制造與維修都較方便。密封面不易磨損及擦傷,密封性好,啟閉時閥瓣與閥體密封面之間無相對滑動,因而磨損與擦傷均不嚴重,密封性能好,使用壽命長。
不銹鋼截止閥的閥桿軸線與閥座密封面垂直。閥桿開啟或關閉行程相對較短,并具有很好的切斷動作,使得這種閥門十分適合作為介質的切斷或調節及節流使用。
閥瓣對焊硬質合金耐沖刷能力強。壓力自密封設計,介質的壓力起伏波動對密封性 能無影響。
1、設計制造按BS5352、MSS SP-118;
2、承插口尺寸按ANSI B16.11;JB/T1751
3、螺紋端尺寸按ANSI B1.20.1;JB/T7306
4、對焊端尺寸按ANSI B16.25;JB/T12224
5、法蘭端尺寸按 ANSI B16.5;JB79
6、閥門檢查和試驗API 598; GB/T13927; JB/T9092
結構特征 螺栓連接閥蓋(B.B)和明桿支架(OS & Y) 焊接閥蓋(W.B)和明桿支架(OS & Y)