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FAQ
14
2016-07
為什么雙座閥小開度工作容易震蕩?
對單芯而言,當介質是流開型時,閥穩定性較好;當介質是流閉型時,閥的穩定性差,雙座閥有兩個閥芯,下閥芯處于流閉,上閥芯處于流開,這樣車小開度工作時,流閉型的閥芯就容易引起閥震動,這就是雙閥座不能用于小開度工作的原因所在。
12
2015-11
為什么切斷閥應盡量選用硬密封?
切斷閥要求泄露越低越好,軟密封的泄露是最低,切斷閥效果當然好,但不耐磨,可靠性差,從泄漏量對密封及可靠性的雙重標準來看,軟密封切斷就不如硬密封切斷好。
09
2015-09
法蘭泄露
1.閥門的法蘭密封連接在接觸部位之間根據設計要求安放密封墊片,依靠連接螺栓所產生的預緊力達到足夠足夠的比壓,阻止介質向外泄露。2.墊片材料和結構有:橡膠墊片、石棉橡膠墊片、石墨墊片、不銹鋼和石墨纏繞式墊片、波紋管形和金屬墊片。3.墊片密封屬于強制密封。
08
2015-01
填料泄露和閥體與閥蓋連接處泄露
1.填料泄露泄露及原因:1)填料密封原理:對填料施加的軸向力,填料產生塑性變形,閥門由于多個填料安裝,部位相互交替接觸,形成“迷宮效應”,起到阻止壓力介質外泄露的作用。
17
2014-10
閥門啟閉有卡阻、不靈活或者不能正常啟閉,甚至無法繼續啟閉
一.閥門啟閉有卡阻、不靈活或者不能正常啟閉,甚至無法繼續啟閉,主要是由于閥桿與其他零件卡阻,主要是閥桿與填料之間的卡阻。一般有: 1.填料壓蓋偏斜后碰閥桿--處理方法:調整壓蓋調節螺栓。 2.填料安裝不正確或壓得過緊--處理方法:填料預緊,適當放松填料。
10
2014-11
閥門密封面擦傷、閥桿光柱部分咬擦傷和閥桿螺紋部分咬傷等
1.密封面研磨后有磨粒嵌入密封面里,末清除干凈,造成密封面擦傷;有的經使用后,磨粒在介質的沖刷下,磨粒排出而粘在密封面上,經閥門開關,造成擦傷。 --處理方法:合理選用研磨劑,密封面研磨后必須清洗干凈。2.介質中的贓物或者焊渣末清除干凈,造成擦傷。
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Melamine is special
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Check valve
Multi-function hydraulic control valve
Pipe fittings and special valves
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18701760109
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