图示的阀门具有独
特的“管道”阀帽。
也可提供带有常规
轭架的标准阀帽
Valve shown has a special
“Pipeline” bonnet.
Standard bonnets
with regular yoke
also available.
B结构
DN350-DN1500阀座-楔板结构*
STYLE B
14-60" SEAT-WEDGE DESIGN*
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结构特征：
DESIGN FEATURES:
- 通过阀座气密性的短程或远程保护提供完全关闭。
Positive shutoff with visual or remote proof
of seat tightness.
- 没有产品污染的绝对气密性。
No product contamination absolute tightness.
- 双阀座。
合成橡胶 -金属阀座加上金属-金属第二重密封。
Dual seating.
Elastomer-to-metal seat plus metal-to-metal secondary seal.
- 防火。
如果第二重合成橡胶阀座在火灾期间被损坏，则金属-金属阀座还可以保证气密性。
Fire Safe.
The metal-to-metal seat ensures tightness if the secondary elastomer
seat is damaged during the fire.
- PTFE阀座镶嵌件
抗介质的腐蚀，在工作温度达到204°C时，具有很好的抗磨能力。
PTFE seat insert
resists corrosive media, has high abrasion resistance and operates
up to +400°F (204°C).
- 配置410不锈钢和密封焊接的阀座硬面。
Seat hardfaced with SS 410 and seal welded.
A结构
DN50-DN300 - 楔板结构
STYLE A
2–12" SEAT - WEDGE DESIGN
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阀座镶嵌件的说明
SPECIFICATIONS FOR SEAT INSERT MATERIALS |
类型
TYPE |
最大工作温度
MAXIMUM OPERATING
TEMPERATURE |
不推荐
NOT RECOMMENDED |
聚四氟乙烯
PTFE |
-100°F to +400°F
-73°C to +204°C |
氟化烃
Fluorinated hydrocarbons |
丁纳橡胶
Buna-N |
-20°F to +200°F
-29°C to +93°C |
卤化烃，硝基苯，苯胺，液压油，特种液压工作油，Cellulube，Pydrazil，丙酮
Halogenated hydrocarbons, Nitrobenzene, Aniline,
Hydraulic fluids, Skydrol, Cellulube, Pydrazil, Acetone |
氟化橡胶
Viton |
-20°F to +400°F
-29°C to +240°C |
丙酮，芳香树脂，无水氨，热氢氟酸，酯，醚类
Acetone, Anines, Anhydrous ammonia,
Hot Hydrofluoric acid, Ester, Ethers |
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适用范围
AVAILABLE RANGE
Velan隔断闸阀和排泄闸阀具有下列通径：
Velan block and bleed gate valves are available
in the following sizes: |
150磅级：
Class 150: |
碳钢，法兰或对焊
DN50-DN1500
carbon steel, flanged
or butt weld,
2– 60" (50–1500 mm). |
300磅级：
Class 300: |
碳钢，法兰或对焊
DN50-Dn900
carbon steel, flanged
or butt weld,
2–36" (50–900 mm). |
易于在线进行阀门阀座维修
EASY IN-LINE VALVE RESEATING
阀座用410不锈钢进行硬面，通过焊接装配延长使用寿命。将楔板从阀体上拆卸后，磨损的软阀座镶嵌件就很容易更换了。在更换阀座镶嵌件之前，关闭流体，减轻压力。
Seats are hardfaced with SS 410 and welded-in
for lifetime service. A worn soft seat insert can easily be replaced after
removal of wedge from the body. Shut off flow and relieve pressure before
replacing the seat insert.
试验栓塞
TEST PLUG
*制造商自行选择A结构
或B结构的DN350-DN600阀门
*14 – 24" (350 –600 mm)
may be STYLE A or B at
manufacturer's option |
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