焊接閘閥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)。紋管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。
焊接閘閥屬于強(qiáng)制密封式閥門,所以在閥門關(guān)閉時,必須向閥瓣施加壓力,以強(qiáng)制密封面不泄漏。當(dāng)介質(zhì)由閥瓣下方進(jìn)入閥六時,操作力所需要克服的阻力,是閥桿和填料的摩擦力與由介質(zhì)的壓力所產(chǎn)生的推力,關(guān)閥門的力比開閥門的力大,所以閥桿的直徑要大,否則會發(fā)生閥桿頂彎的故障。從自密封的閥門出現(xiàn)后,截止閥的介質(zhì)流向就改由閥瓣上方進(jìn)入閥腔,這時在介質(zhì)壓力作用下,關(guān)閥門的力小,而開閥門的力大,閥桿的直徑可以相應(yīng)地減少。同時,在介質(zhì)作用下,這種形式的閥門也較嚴(yán)密。我國閥門“三化給”曾規(guī)定,截止閥的流向,一律采用自上而下。
開啟時,閥瓣的開啟高度,為公稱直徑的25%~30%時,流量已達(dá)到zui大,表示閥門已達(dá)全開位置。所以截止閥的全開位置,應(yīng)由閥瓣的行程來決定。
執(zhí)入標(biāo)準(zhǔn)Administer standard | ||||||
● 制造與驗收技術(shù)條件按日本火力發(fā)電用閥門標(biāo)準(zhǔn)E101和JB/T3595-93的規(guī)定; | ||||||
● 結(jié)構(gòu)長度按E101的規(guī)定或按用戶提供尺寸 | ||||||
● 焊接坡口接電力工業(yè)管理標(biāo)準(zhǔn)78DG的規(guī)定或按用戶提供尺寸。 | ||||||
● The manufalture and aueptanle specigication shan be based on the japanese standard E101 applied for the thermal powerand JB/T3595-93 | ||||||
● The length shall bein line with E101 or by user’s speeification. | ||||||
● Welding groove shan be in auordanle with power industrh spe-cification 78DG or hg user’ specification | ||||||
● The size in inclose is old production’s size |
性能規(guī)范Property and specifiecation | ||||||
產(chǎn)品型號 Product type公稱壓力PN(MPa)Nominal pressure | 試驗壓力(MPa)Test pressure | 工作壓力(MPa)Working pressure | 工作溫度(℃)Working temperature | 適用介質(zhì)Appicable medium | ||
強(qiáng)度試驗Sheel test | 密封試驗/上密封實驗Seal test | |||||
Z960Y-250 | 25 | 37.5 | 27.5 | - | ≤425 | 水、蒸汽、Water,steam |
Z960Y-320 | 32 | 48.0 | 36.0 | - | ≤425 | |
Z960Y-P54100 | - | 30.0 | 22.0 | P5410 | ≤540 | 蒸汽 Steam |
Z960Y-P54170 | - | 48.0 | 36.0 | P5417 | ≤540 | |
主要零件材料Matecrial for main parts | ||||||
零件名稱Part name | 材料牌號Material designation | |||||
閥體Body | WCB | WC6 | WC9 | |||
閥板Disc | WCB | WC6 | WC9 | |||
閥蓋Bonnet | 25 | 12Cr1Mo1VA | ||||
閥桿Stem | 1Cr17Ni2 | 20Cr1Mo1VA | ||||
閥座Seat | 25 | 12Cr1Mo1VA | ||||
密封環(huán)Sealing ring | S軟鋼(增強(qiáng)柔性石墨)S soft steel (flexible graphite) | S軟鋼S soft steel | F軟鋼F Soft steel | |||
填料Packing | 增強(qiáng)柔性石墨Fexible graphite | |||||
支架Yoke | WCB | WCB或WC6 | ||||
閥桿螺母Stem nut | 45(ZCuZn25A16Fe3Mn3) | |||||
四開環(huán)Four piece ring | 1Cr13 | 20Cr1MoVA |
主要尺寸及重量Main dimensions and weight |
公稱通徑DNNominal diameter | 主要外形尺寸和連接尺寸(mm)Main external and connecting dimensions | 電動裝置Electric dewice | 重量(kg)Weight | ||||
d | L | H | L1 | L2 | |||
Z60Y/Z62Y-250 | |||||||
100 | 84 | 406 | 1164 | 437 | 277 | DZW45 | 234 |
125 | 100 | 483 | 1402 | 437 | 277 | DZW60 | 343 |
175 | 158 | 711 | 1650 | 554 | 309 | DZW180 | 638 |
225 | 200 | 864 | 1650 | 554 | 309 | DZW180 | 654 |
所有評論僅代表網(wǎng)友意見,與本站立場無關(guān)。