API焊接截止阀是一种常用的截断阀，主要用来接通或截断管路中的介质，一般不用于调节流量。截止阀适用的压力、温度范围很大，但一般用于中、小口径的管道。
API焊接截止阀的主要优点：
1）与闸阀相比，截止阀的结构较简单，制造与维修都较方便。
2）密封面不易磨损、擦伤，密封性较好，寿命较长。
3）启闭时阀瓣行程较小，启闭时间较短，阀门高度较小。
主要零件材质：
主要零部件 | 阀体 阀盖 | 碳钢 | 铬镍钛不锈钢 | 铬镍钼钛不锈钢 | 超低碳不锈钢 | 铬钼合金钢 | 低温碳钢 | ||
阀瓣 阀座 | 碳钢堆焊硬质合金或不锈钢 | 铬镍钛不锈钢 堆焊硬质合金 | 铬镍钼钛不锈钢 堆焊硬质合金 | 超低碳不锈钢 | 铬钼合金钢 堆焊硬质合金 | 不锈钢堆焊硬质合金 | |||
阀杆 | 铬不锈钢 | 铬镍钛不锈钢 | 铬镍钼钛不锈钢 | 超低碳不锈钢 | 铬钼合金钢 | 不锈钢 | |||
填料 | 石墨石棉盘根 | 浸聚四氟乙烯石棉盘根 | 柔性石墨石棉盘根 | 浸聚四氟乙烯石棉盘根 | |||||
垫片 | 石棉垫片 | 不锈钢带四氟乙烯缠绕垫片 | 柔性石墨+不锈钢 | 聚四氟乙烯 | |||||
阀杆螺母 | 高镍球铁/ZguAL10Fe3 | ||||||||
主要参数 | 适用介质 | 水、蒸汽、油品 | 硝酸类 | 醋酸类 | 尿素、甲铵液等 | 水、蒸汽、石油及石油产品 | 氨气、液氨 | ||
适用温度℃ | ≤425 | ≤200 | ≤200 | ≤200 | ≤550 | -45～1 | |||
外形及连接尺寸：
型号 | 公称 通径 NPS(in) | 压力级 Class | 主要结构尺寸(mm) | 阀体 材料 | 性能规范 | ||||
Do | D | L | H | 适用温度(℃) | 适用介质 | ||||
SFJ-61C150C | 2" | 150 | 200 |
| 203 | 380 | WCB | ≤425 | 蒸气、油品、水等 |
" | 3" | " | 250 |
| 241 | 465 | " | " | " |
'' | 4" | " | 300 |
| 292 | 530 | " | " | " |
" | 6" | " | 350 |
| 406 | 650 | " | " | " |
" | 8" | " | 400 |
| 495 | 760 | " | " | " |
" | 10" | " | 500 |
| 622 | 860 | " | " | " |
" | 12" | " | 600 |
| 699 | 1000 | " | " | " |
" | 14" | " | 600 |
| 787 | 1050 | " | " | " |
" | 16" | " | 750 |
| 914 | 1150 | " | " | " |
SFJ-61C300C | 2" | 300 | 200 |
| 267 | 425 | WCB | ≤425 | 蒸气、油品、水等 |
" | 3" | " | 250 |
| 318 | 530 | " | " | " |
" | 4" | " | 300 |
| 356 | 610 | " | " | " |
" | 6" | " | 400 |
| 445 | 790 | " | " | " |
" | 8" | " | 500 |
| 559 | 870 | " | " | " |
" | 10" | " | 500 |
| 622 | 1040 | " | " | " |
" | 12" | " | 600 |
| 711 | 1140 | " | " | " |
" | 14" | " | 750 |
| 838 | 1200 | " | " | " |
" | 16" | " | 850 |
| 864 | 1400 | " | " | " |
SFJ-61C600C | 2" | 600 | 250 |
| 292 | 475 | WCB | ≤425 | 蒸气、油品、水等 |
" | 3" | " | 300 |
| 356 | 585 | " | " | " |
" | 4" | " | 350 |
| 432 | 675 | " | " | " |
" | 6" | " | 450 |
| 559 | 885 | " | " | " |
" | 8" | " | 500 |
| 660 | 945 | " | " | " |
" | 10" | " | 600 |
| 787 | 1040 | " | " | " |
" | 12" | " | 750 |
| 838 | 1280 | " | " | " |
" | 14" | " | 850 |
| 889 | 1350 | " | " | " |
" | 16" | " | 960 |
| 991 | 1550 | " | " | " |
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