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截止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）。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。
執(zhí)行標(biāo)準(zhǔn) Administer Standard
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設(shè)計與制造 Design and Manufacture
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結(jié)構(gòu)長度
Face To Face |
法蘭尺寸
Flange Dimension |
壓力-溫度 Pressure Temperature Lating
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試驗-檢驗 Inspection And Test
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GB122235
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GB12221
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GB9113 JB79
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GB9131
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GB/T13927 JB/T9092
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法蘭高壓截止閥 壓力試驗 Pressure Test
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公稱壓力NominalPressure
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1.6
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2.5
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4.0
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6.4
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10.0
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16.0
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強(qiáng)度試驗 Shell Test
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2.4
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3.8
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6.0
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9.6
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15.0
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24.0
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水密封試驗 Water Seal Test
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1.8
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2.8
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4.4
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7.0
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11.0
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18.0
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上密封試驗Backseat Test
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1.8
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2.8
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4.4
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7.0
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11.0
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18.0
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氣密封試驗 Air Seal Test
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0.5-0.7
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法蘭高壓截止閥 主要零件材料及性能 Main Part Materials and Property
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體、蓋、板 Body Cover Disc
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閥桿
Stem |
密封面 Sealing Face
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墊片
Sealing Shim |
填料
Packing |
工作溫度℃ Working Temperature
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適用介質(zhì)Suitable Medium
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WCB
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2Cr13
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13Cr
STL
木體材料
With Body
Material
尼龍
Nylon
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增強(qiáng)柔性石墨
Enhanced Flexible Graphite
13Cr/柔性石墨
1Cr13/Flexible Graphite
08軟鋼
08 Soft Steal
0Cr18Ni9Ti
0Cr17Ni12Mo2Ti
XD550F(T)
PTFE
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柔性石墨
增強(qiáng)柔性石墨
Flexible Graphite
Enhanced Flexible Graphite
SFB/260
SFP/260
PTFE
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≤425
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水
蒸汽
油品
Water
Steam
Petroleum
Ptoducts
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WC1
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38CrMoAl
25Cr2MoV
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≤450
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WC6
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≤540
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WC9
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≤570
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C5 C12
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≤540
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ZGCr5Mo
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≤200
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硝酸類Nitric acid
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ZG1Cr18Ni9Ti
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1Cr18Ni9Ti
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≤200
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醋酸類Acetic acid
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ZG1Cr18Ni12Mo2Ti
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1Cr18Ni12Mo2Ti
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