截止閥(Globe Valve)的啟閉件是塞形的閥瓣,密封面呈平面或錐面,閥瓣沿流體的中心線作直線運(yùn)動。閥桿的運(yùn)動形式,有升降桿式(閥桿升降,手輪不升降),也有升降旋轉(zhuǎn)桿式(手輪與閥桿一起旋轉(zhuǎn)升降,螺母設(shè)在閥體上)。截止閥只適用于全開和全關(guān),不允許作調(diào)節(jié)和節(jié)流。 電動截止閥結(jié)構(gòu)圖
主要特點(diǎn)及用途 Chief features and usages |
1、結(jié)構(gòu)緊湊、設(shè)計合理,閥門剛性好,通道流暢,流阻系數(shù)小。 |
2、密封面采用不銹鋼和硬質(zhì)合金,使用壽命長 |
3、采用柔性石墨填料、密封可靠、操作輕便靈活 |
4、驅(qū)動方式分手動、電動、氣動、齒輪傳功,結(jié)構(gòu)型式:彈性楔式單閘板、剛性楔式單閘板和雙閘板型式。 |
5、廣泛適用于石油化工,火力發(fā)電廠等油品、水蒸汽管路上作接通或截斷管路中介質(zhì)的啟閉裝置。 |
1、Compact structure,neasonnable design,good rigidity,smooth channel,small coefficient of flow resistance. |
2、The sealing face uses stainless steel and carbide alloy and is of long duration |
3、Using flexible graphite fillings,reliable sealing,light and nimble operation |
4、Four driving ways,manually,electrically,air-ioerating and gear-driving,structure type,elastic wedge type with single gate board,right rigi-dwedge type with single or dual-gate board. |
5、Widely used as the device of open or close to connect or cut off the medium inside of the pioeline of water,steam or oil goods in steam power plants |
主要性能規(guī)范 Chief property and specification |
試驗(yàn)壓力Test pressure |
公稱壓力PN(MPa) Nominal pressure | 實(shí)驗(yàn)壓力(MPa)Test pressure | |||
殼體Shell | 密封(液)Seal | 密封(氣)Seal | 上密封Back seal | |
1.6 | 2.4 | 1.8 | 0.6 | 1.8 |
2.5 | 3.8 | 2.8 | 0.6 | 2.8 |
4.0 | 6.0 | 4.4 | 0.6 | 4.4 |
6.4 | 9.6 | 7.0 | 0.6 | 7.0 |
10.0 | 15.0 | 11.0 | 0.6 | 11.0 |
16.0 | 24.0 | 18.0 | 0.6 | 18.0 |