液動(dòng)截止閥是一種常用的截?cái)嚅y，主要用來(lái)接通或截?cái)喙苈分械慕?br>質(zhì)。截止閥適用的壓力、溫度范圍很大、小口徑的管道。主要優(yōu)點(diǎn)：
結(jié)構(gòu)簡(jiǎn)單，制造與維修都比較方便；
密封面不易磨損、擦傷，密封性較好，壽命較長(zhǎng)；
啟閉時(shí)閥瓣行程較小，啟閉時(shí)間較短，閥門(mén)高度較小。

液動(dòng)截止閥概述：
截止閥是一種常用的截?cái)嚅y，主要用來(lái)接通或截?cái)喙苈分械慕?br>質(zhì)。截止閥適用的壓力、溫度范圍很大、小口徑的管道。主要優(yōu)點(diǎn)：
結(jié)構(gòu)簡(jiǎn)單，制造與維修都比較方便；
密封面不易磨損、擦傷，密封性較好，壽命較長(zhǎng)；
啟閉時(shí)閥瓣行程較小，啟閉時(shí)間較短，閥門(mén)高度較小。

液動(dòng)截止閥基本設(shè)計(jì)：
設(shè)計(jì)制造：API602/API6D
結(jié)構(gòu)長(zhǎng)度：ANSI B16.10
法蘭端尺寸：ANSI B16.5（RF）
對(duì)焊端尺寸：ANSI B16.25
承插端尺寸：ANSI B16.11
閥門(mén)的檢驗(yàn)和試驗(yàn)：API598

液動(dòng)截止閥結(jié)構(gòu)特點(diǎn)：
 1、靈活可靠的氣動(dòng)一一手動(dòng)轉(zhuǎn)換機(jī)構(gòu)。裝在氣缸蓋上部的氣動(dòng)/手動(dòng)轉(zhuǎn)換機(jī)構(gòu)，在截止閥開(kāi)啟和關(guān)閉過(guò)程的任體何位置上，都可十分方便地轉(zhuǎn)動(dòng)操作手柄，直接地進(jìn)行由氣動(dòng)至手動(dòng)或由手動(dòng)至氣動(dòng)的操作方式的轉(zhuǎn)換，轉(zhuǎn)換操作手柄采用定位銷(xiāo)式自鎖設(shè)計(jì)、手柄定位后，可靠鎮(zhèn)定。
 2、由電磁閥及其控制電路或供風(fēng)系統(tǒng)以生故障時(shí)，不需其他輔助工具，即可迅速轉(zhuǎn)換成手動(dòng)操作狀態(tài)，保證線路正常運(yùn)行，避免事故發(fā)生。
 3、在新建工程的自控系統(tǒng)未完成之前，本系列截止閥可以可靠地作為手動(dòng)截止閥使用，動(dòng)作時(shí)靈活輕快。本閥門(mén)按順時(shí)針?lè)较蛐D(zhuǎn)手輪時(shí)，閥瓣下降切斷通道，即為關(guān)閉，逆時(shí)針轉(zhuǎn)時(shí)則為開(kāi)啟。
 4、本閥可分為氣動(dòng)雙作用式和氣動(dòng)常開(kāi)式及氣動(dòng)常閉式。
 5、工作介質(zhì)應(yīng)由閥瓣下面往上流（氣動(dòng)的與之相反）
 6、本閥可以配用電的或氣的回訊器，用以發(fā)送閥門(mén)開(kāi)關(guān)狀態(tài)信息。因此，使用本閥可以實(shí)現(xiàn)遠(yuǎn)距離控制，集中控制和自動(dòng)控制。
 7、本閥的氣缸選用無(wú)縫鋼管制造，內(nèi)表面鍍以耐腐性硬鉻，并經(jīng)拋光處理，具有磨擦力小、不易銹蝕、高硬度、壽命長(zhǎng)等優(yōu)點(diǎn)。
 8、氣缸中的密封圈采用ding腈橡膠。形密封圈，密封性能可靠，維修時(shí)更換方便。

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