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型号28
Figure 28
法兰
Flanged
型号281/2
Figure 281/2
对焊
Butt Weld
通径范围：
Size Range:
DN50至DN250
2 through 10 inches
压力温度等级
碳钢
ASTM A216等级WCB
740 psi @ -28oC至37oC
Pressure Temperature Rating
Carbon Steel
ASTM A216 Grade WCB
740 psi @ -20oF to 100oF
注释
Notes
- 除非另有说明，否则DN250及以下
通径的阀门的对焊连接端口都经过
镗孔，以便配置标准管道。对于更
大的阀门，则必须指定镗孔的直径
(管道内径)。
Butt weld ends on valves 10" and
smaller are bored to match standard
pipe unless otherwise specified. For
larger valves, diameter (I.D. of pipe) of
bore must be specified.
- 通径DN200和DN250，压力等级
Class 300，配置锤击手轮。
Sizes 8" and 10", Class 300 are
equipped with a hammer-blow
handwheel.
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结构材料
Material of Construction |
描述
Description |
材料
Material |
阀体
Body |
ASTM A216 WCB碳钢
ASTM A216 WCB |
阀盖
Bonnet |
ASTM A216 WCB碳钢
ASTM A216 WCB |
阀瓣
Disc |
硬面
Hardfaced |
阀杆
Stem |
13%铬
13% Chrome |
阀体垫圈
Body Gasket |
低碳钢
Soft Steel |
阀体柱头螺栓
Body Studs |
ASTM A194 B7 |
阀体螺母
Body Nuts |
ASTM A194 2H |
有眼螺栓
Eye Bolt |
碳钢
Carbon Steel |
有槽销钉
Groove Pins |
碳钢
Carbon Steel |
衬筒
Liner |
碳钢
Carbon Steel |
阀座
Seat |
13%铬
13% Chrome |
压盖
Gland |
13%铬
13% Chrome |
压盖法兰
Gland Flange |
碳钢
Carbon Steel |
手轮
Handwheel |
球墨铸铁
Ductile Iron |
轭架套管
Yokesleeve |
青铜
Bronze |
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