。闸阀闸体内部介质通道是直通的，介质流经闸阀时不改变其流动方向，因而流动阻力较小。
（2）启闭较省力。启闭时闸板运动方向与介质流动方向相垂直。
| 低温闸阀 闸阀是zui常用的截断阀之一，主要用来接通或截断管路中的介质，不适用于调节介质流量。闸阀适用的压力、温度及口径范围很大，尤其适用于中、大口径的管道。 闸阀的主要优点： （1）流体阻力小。闸阀闸体内部介质通道是直通的，介质流经闸阀时不改变其流动方向，因而流动阻力较小。 （2）启闭较省力。启闭时闸板运动方向与介质流动方向相垂直。与截止阀相比，闸阀的启闭较为省力。 （3）介质流动方向一般不受限制。介质可从闸阀两侧任意方向流过，均能达到接通或截断的目的。便于安装，适用于介质的流动方向可能改变的管路中。 | |||||||||
| 主要零件材料及性能规范 | |||||||||
| 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 | ||
| 闸板阀座 | 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 | -45～150 | |||
| 型号 | 公称 | 主要结构尺寸（mm） | 阀体材料 | 性能规范 | |||||
| 通径 DN（mm） | 压力 PN（MPa） | D | D0 | L | H | 适用温度（℃） | 适用介质 | ||
| SFD46Z | 1/2" | 150 | 89 | 140 | 108 | 345 | LCB | ≥-46 | NH3、丙烷 |
| " | 3/4" | " | 98 | 150 | 117 | 355 | " | " | " |
| " | 1" | " | 108 | 150 | 127 | 454 | " | " | " |
| " | 2" | " | 152 | 200 | 178 | 481 | " | " | " |
| " | 3" | " | 190 | 230 | 203 | 574 | " | " | " |
| " | 4" | " | 229 | 280 | 229 | 708 | " | " | " |
| " | 6" | " | 279 | 330 | 267 | 946 | " | " | " |
| " | 8" | " | 343 | 380 | 292 | 1118 | " | " | " |
| " | 10" | " | 406 | 460 | 330 | 1312 | " | " | " |
| " | 12" | " | 483 | 510 | 356 | 1547 | " | " | " |
| " | 14" | " | 533 | 560 | 381 | 1811 | " | " | " |
| " | 16" | " | 597 | 560 | 406 | 2002 | " | " | " |
| " | 18" | " | 635 | 610 | 432 | 2256 | " | " | " |
| " | 20" | " | 698 | 760 | 457 | 2532 | " | " | " |
| " | 24" | " | 813 | 810 | 508 | 3000 | " | " | " |
| SFD101Z | 1/2" | 150 | 89 | 140 | 108 | 405 | LC3 | ≥-101 | 乙烯等 |
| " | 3/4" | " | 98 | 150 | 117 | 415 | " | " | " |
| " | 1" | " | 108 | 150 | 127 | 514 | " | " | " |
| " | 2" | " | 152 | 200 | 178 | 591 | " | " | " |
| " | 3" | " | 190 | 230 | 203 | 634 | " | " | " |
| " | 4" | " | 229 | 280 | 229 | 768 | " | " | " |
| " | 6" | " | 279 | 330 | 267 | 1006 | " | " | " |
| " | 8" | " | 343 | 380 | 292 | 1128 | " | " | " |
| " | 10" | " | 406 | 460 | 330 | 1372 | " | " | " |
| " | 12" | " | 483 | 510 | 356 | 1607 | " | " | " |
| " | 14" | " | 533 | 560 | 381 | 1871 | " | " | " |
| " | 16" | " | 597 | 560 | 406 | 2062 | " | " | " |
| " | 18" | " | 635 | 610 | 432 | 2316 | " | " | " |
| " | 20" | " | 698 | 760 | 457 | 2592 | " | " | " |
| " | 24" | " | 813 | 810 | 508 | 3060 | " | " | " |
| SFD196Z150P | 1/2" | 150 | 89 | 140 | 108 | 405 | ZGOCr18Ni9 | ≥-196 | 液氨、乙烯、液化天然气等 |
| " | 3/4" | " | 98 | 150 | 117 | 415 | " | " | " |
| " | 1" | " | 108 | 150 | 127 | 514 | " | " | " |
| " | 2" | " | 152 | 200 | 178 | 591 | " | " | " |
| " | 3" | " | 190 | 230 | 203 | 634 | " | " | " |
| " | 4" | " | 229 | 280 | 229 | 768 | " | " | " |
| " | 6" | " | 279 | 330 | 267 | 1006 | " | " | " |
| " | 8" | " | 343 | 380 | 292 | 1128 | " | " | " |
| " | 10" | " | 406 | 460 | 330 | 1372 | " | " | " |
| " | 12" | " | 483 | 510 | 356 | 1607 | " | " | " |
| " | 14" | " | 533 | 560 | 381 | 1871 | " | " | " |
| SFD196Z150P | 16" | 150 | 597 | 560 | 406 | 2062 | ZGOCr18Ni9 | ≥-196 | 液氨、乙烯、液化天然气等 |
| " | 18" | " | 635 | 610 | 432 | 2316 | " | " | " |
| " | 20" | " | 698 | 760 | 457 | 2592 | " | " | " |
| " | 24" | " | 813 | 810 | 508 | 3060 | " | " | " |
| SFD46Z | 16" | 150 | 597 | 560 | 406 | 2002 | LCB | ≥-46 | NH3、丙烷 |
| " | 18" | " | 635 | 610 | 432 | 2256 | " | " | " |
| " | 20" | " | 698 | 760 | 457 | 2532 | " | " | " |
| " | 24" | " | 813 | 810 | 508 | 300 | " | " | " |
| SFD101Z | 16" | 150 | 597 | 560 | 406 | 2062 | LC3 | ≥-101 | 乙烯等 |
| " | 18" | " | 635 | 610 | 432 | 2316 | " | " | " |
| " | 20" | " | 698 | 760 | 457 | 2592 | " | " | " |
| " | 24" | " | 813 | 810 | 508 | 3060 | " | " | " |
| SFD196Z150P | 16" | 150 | 597 | 560 | 406 | 2062 | ZGOCr18Ni9 | ≥-196 | 液氨、乙烯、液化天然气等 |
| " | 18" | " | 635 | 610 | 432 | 2316 | " | " | " |
| " | 20" | " | 698 | 760 | 457 | 2592 | " | " | " |
| " | 24" | " | 813 | 810 | 508 | 3060 | " | " | " |
| SFD46Z | 1/2" | 300 | LCB | ≥-46 | NH3、丙烷 | ||||
| " | 3/4" | " | " | " | " | ||||
| " | 1" | " | " | " | " | ||||
| " | 2" | " | 165 | 230 | 216 | 501 | " | " | " |
| " | 3" | " | 210 | 280 | 283 | 603 | " | " | " |
| " | 4" | " | 254 | 330 | 305 | 727 | " | " | " |
| " | 6" | " | 318 | 380 | 403 | 969 | " | " | " |
| " | 8" | " | 381 | 460 | 419 | 1175 | " | " | " |
| " | 10" | " | 444 | 510 | 457 | 1426 | " | " | " |
| " | 12" | " | 521 | 510 | 502 | 1611 | " | " | " |
| " | 14" | " | 584 | 560 | 762 | 2014 | " | " | " |
| " | 16" | " | 648 | 610 | 838 | 2230 | " | " | " |
| " | 18" | " | " | " | " | ||||
| " | 20" | " | " | " | " | ||||
| " | 24" | " | " | " | " | ||||
| SFD101Z | 1/2" | 300 | LC3 | ≥-101 | 乙烯等 | ||||
| " | 3/4" | " | " | " | " | ||||
| " | 1" | " | " | " | " | ||||
| " | 2" | " | 165 | 230 | 216 | 561 | " | " | " |
| " | 3" | " | 210 | 280 | 283 | 673 | " | " | " |
| " | 4" | " | 254 | 330 | 305 | 797 | " | " | " |
| " | 6" | " | 318 | 380 | 403 | 1039 | " | " | " |
| " | 8" | " | 381 | 460 | 419 | 1245 | " | " | " |
| " | 10" | " | 444 | 510 | 457 | 1496 | " | " | " |
| SFD101Z | 12" | 300 | 521 | 510 | 502 | 1671 | LC3 | ≥-101 | 乙烯等 |
| " | 14" | " | 584 | 560 | 762 | 2084 | " | " | " |
| " | 16" | " | 648 | 610 | 832 | 2300 | " | " | " |
| " | 18" | " | " | " | " | ||||
| " | 20" | " | " | " | " | ||||
| " | 24" | " | " | " | " | ||||
| SFD196Z300P | 1/2" | 300 | ZGOCr18Ni9 | ≥-196 | 液氨、乙烯、液化天然气等 | ||||
| " | 3/4" | " | 117 | 150 | 152 | 497 | " | " | " |
| " | 1" | " | 124 | 150 | 165 | 522 | " | " | " |
| " | 2" | " | 165 | 230 | 216 | 561 | " | " | " |
| " | 3" | " | 210 | 280 | 283 | 673 | " | " | " |
| " | 4" | " | 254 | 330 | 305 | 797 | " | " | " |
| " | 6" | " | 318 | 380 | 403 | 1039 | " | " | " |
| " | 8" | " | 381 | 460 | 419 | 1245 | " | " | " |
| " | 10" | " | 444 | 510 | 457 | 1496 | " | " | " |
| " | 12" | " | 521 | 510 | 502 | 1671 | " | " | " |
| " | 14" | " | 584 | 560 | 762 | 2084 | " | " | " |
| " | 16" | " | 648 | 610 | 838 | 2300 | " | " | " |
| " | 18" | " | " | " | " | ||||
| " | 20" | " | " | " | " | ||||
| " | 24" | " | " | " | " | ||||
| SFD46Z | 1/2" | 600 | LF1 | ≥-46 | NH3、丙烷 | ||||
| " | 3/4" | " | 35 | 140 | 92 | 382 | " | " | " |
| " | 1" | " | 41 | 180 | 111 | 447 | " | " | " |
| " | 11/2" | " | 57 | 180 | 141 | 499 | " | " | " |
| " | 2" | " | 165 | 250 | 292 | 580 | " | " | " |
| " | 3" | " | 210 | 300 | 356 | 790 | " | " | " |
| " | 4" | " | 273 | 350 | 432 | 946 | " | " | " |
| " | 6" | " | 356 | 510 | 559 | 1255 | " | " | " |
| SFD101Z | 3/4" | 600 | 38 | 140 | 92 | 422 | LC3 | ≥-101 | 乙烯等 |
| " | 1" | " | 55 | 180 | 127 | 497 | " | " | " |
| " | 11/2" | " | 70 | 180 | 200 | 560 | " | " | " |
| " | 2" | " | 165 | 250 | 292 | 640 | " | " | " |
| " | 3" | " | 210 | 300 | 356 | 860 | " | " | " |
| " | 4" | " | 273 | 350 | 432 | 1010 | " | " | " |
| " | 6" | " | 356 | 510 | 559 | 1320 | " | " | " |
| SFD196Z600P | 1/2" | 600 | 20 | 150 | 92 | 400 | OCr18Ni9 | ≥-196 | 液氨、乙烯、液化天然气等 |
| " | 3/4" | " | 35 | 150 | 92 | 422 | " | " | " |
| " | 1" | " | 41 | 180 | 133 | 497 | " | " | " |
| SFD196Z600P | 11/2" | 600 | 57 | 180 | 152 | 560 | OCr18Ni9 | ≥-196 | 液氨、乙烯、液化天然气等 |
| " | 2" | " | 165 | 250 | 292 | 640 | " | " | " |
| " | 3" | " | 210 | 300 | 356 | 860 | " | " | " |
| " | 4" | " | 273 | 350 | 432 | 1010 | " | " | " |
| " | 6" | " | 356 | 510 | 559 | 1320 | " | " | " |
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