●止回阀用于管路系统，其主要作用是防止介质倒流、防止泵及其驱动电机机反转，以及容器内介质的泄放。止回阀还可用于给其中的压力可能升至超过主系统压力的辅助系统提供补给的管路上。
●产品的设计制造符合美国国家标准ANSI B16.34，美国石油学会标准API6D要求
●阀门承压件采用精密铸造工艺浇铸，表面质量美观，无粘沙、冷隔等表面缺陷;内在质量稳定，无疏松、砂眼、裂纹等内在缺陷。
●旋启式止回阀采用内装摇臂旋启式结构，阀门的所有启闭件都装于阀体内部，不穿透阀体，除了中法兰部位用密封垫片或密封环密封外，整体没有外漏点，杜绝了阀门外泄的可能。
●旋启式止因阀摇臂和阀瓣连接处采用球面连接的结构，使得阀瓣在360℃范围内有一定的自由度，有适当的微量位置补偿。
●旋启式止回阀密封副的密封面堆焊合金钢(13Cr)或硬质合金Stellite6,即使用在有细颗粒的介质中并不会因冲蚀而很快磨损。
美标铸钢旋启式止回阀设计与制造标准:
●设计与制造:API6D、ANSI/ASME B16.34
●结构长度:ANSI/ASME B16.10、API6D
●法兰尺寸:ANSI/ASME B16.5、API605
●压力温度:ANSI/ASME B16.34
●对焊连接尺寸:ANSI/ASME B16.25
●检验与试验:API598、API6D 美标铸钢止回阀主要安装尺寸及重量:(Dimensions and Weight) 单位:mm/in
Class 150 |
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DN(mm) | 15 | 25 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 700 | 750 |
NPS (in) | 1/2 | 1 | 1-1/2 | 2 | 2-1/2 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 | 28 | 30 |
L(RF-BW) | 108 | 127 | 165 | 203 | 216 | 241 | 292 | 330 | 356 | 495 | 622 | 699 | 787 | 864 | 978 | 978 | 1295 | 1448 | 1524 |
4.3 | 5 | 6.5 | 8 | 8.5 | 9.5 | 11.5 | 13 | 14 | 19.5 | 24.5 | 27.5 | 31 | 34 | 38.5 | 38.5 | 51 | 57 | 60 |
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L(RTJ) | 119 | 140 | 178 | 216 | 229 | 254 | 305 | 343 | 368 | 508 | 635 | 711 | 800 | 876 | 991 | 991 | 1308 | 1461 | 1537 |
4.7 | 5.5 | 7 | 8.5 | 11.5 | 10 | 12 | 13.5 | 14.5 | 20 | 25 | 28 | 31.5 | 34.5 | 39 | 39 | 51.5 | 57.5 | 60.5 |
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H | 130 | 140 | 150 | 170 | 180 | 185 | 215 | 240 | 260 | 300 | 350 | 400 | 450 | 480 | 540 | 600 | 680 | 710 | 790 |
5.1 | 5.5 | 6 | 6.8 | 7.1 | 7.4 | 8.5 | 9.5 | 10.3 | 11.9 | 13.9 | 15.8 | 17.8 | 19 | 21.3 | 25.6 | 26.8 | 28 | 31.1 |
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RF(Kg) | 7 | 8 | 11 | 15 | 23 | 33 | 44 | 69 | 78 | 137 | 207 | 279 | 428 | 555 | 775 | 835 | 1295 | 1450 | 1620 |
BW(Kg) | 6 | 7 | 8.5 | 12 | 16 | 24 | 34 | 57 | 63 | 122 | 175 | 229 | 368 | 483 | 685 | 720 | 1150 | 1300 | 1450 |
Class 300 |
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DN(mm) | 25 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 700 | 750 |
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NPS (in) | 1 | 1-1/2 | 2 | 2-1/2 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 | 28 | 30 |
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L(RF-BW) | 216 | 241 | 267 | 292 | 318 | 356 | 400 | 444 | 533 | 622 | 711 | 838 | 864 | 978 | 1016 | 1346 | 1499 | 1594 |
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8.5 | 9.5 | 10.5 | 11.5 | 12.5 | 14 | 15.8 | 17.5 | 21 | 24.5 | 28 | 33 | 34 | 38.5 | 40 | 53.9 | 59 | 62.8 |
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L(RTJ) | 229 | 254 | 283 | 308 | 333 | 371 | 416 | 460 | 549 | 638 | 727 | 854 | 879 | 994 | 1035 | 1368 | 1524 | 1619 |
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9 | 10 | 11.1 | 12.1 | 13.1 | 14.6 | 16.4 | 18.1 | 21.6 | 25.1 | 28.6 | 33.6 | 34.6 | 39.1 | 40.8 | 53.9 | 60 | 63.8 |
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H | 150 | 160 | 170 | 185 | 215 | 235 | 270 | 300 | 340 | 350 | 420 | 480 | 520 | 600 | 670 | 750 | 780 | 810 |
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5.9 | 6.3 | 6.8 | 7.4 | 8.5 | 9.3 | 10.6 | 11.9 | 13.4 | 13.9 | 16.6 | 18.9 | 20.5 | 23.6 | 26.4 | 29.6 | 30.7 | 31.9 |
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RF(Kg) | 10 | 12 | 21 | 24 | 39 | 60 | 80 | 90 | 175 | 210 | 286 | 700 | 774 | 1000 | 1273 | 1650 | 1725 | 1819 |
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BW(Kg) | 8 | 10 | 16 | 17 | 30 | 50 | 61 | 68 | 145 | 180 | 260 | 490 | 640 | 850 | 1100 | 1400 | 1570 | 1700 |
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Class 600 |
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DN(mm) | 50 | 65 | 80 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 |
NPS (in) | 2 | 2-1/2 | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 |
L(RF-BW) | 292 | 330 | 356 | 432 | 559 | 660 | 787 | 838 | 889 | 991 | 1092 | 1194 | 1397 |
11.5 | 13 | 14 | 17 | 22 | 26 | 31 | 33 | 35 | 39 | 43 | 47 | 55 |
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L(RTJ) | 295 | 333 | 359 | 435 | 562 | 664 | 791 | 841 | 892 | 994 | 1095 | 1200 | 1407 |
11.6 | 13.1 | 14.1 | 17.1 | 22.1 | 26.1 | 31.1 | 33.1 | 35.1 | 39.1 | 43.1 | 47.3 | 55.4 |
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H | 175 | 200 | 230 | 295 | 360 | 400 | 460 | 520 | 560 | 650 | 730 | 800 | 900 |
6.9 | 7.9 | 9.1 | 11.6 | 14.3 | 15.8 | 18.1 | 20.5 | 22.1 | 25.6 | 28.8 | 31.5 | 35.5 |
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RF ( Kg ) | 28 | 38 | 55 | 87 | 208 | 355 | 580 | 790 | 892 | 1200 | 1600 | 2420 | 3150 |
BW ( Kg ) | 20 | 30 | 42 | 65 | 145 | 280 | 490 | 670 | 750 | 1020 | 1350 | 2050 | 2720 |
Class 900 |
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DN(mm) | 50 | 65 | 80 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 |
NPS (in) | 2 | 2-1/2 | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 |
L(RF-BW) | 368 | 419 | 381 | 457 | 610 | 737 | 838 | 965 | 1029 | 1130 | 1219 | 1321 | 1549 |
14.5 | 16.5 | 15 | 18 | 24 | 29 | 33 | 38 | 40.5 | 44.5 | 48 | 52 | 61 |
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L(RTJ) | 371 | 422 | 384 | 460 | 613 | 740 | 841 | 968 | 1038 | 1140 | 1232 | 1334 | 1568 |
14.6 | 16.6 | 15.1 | 18.1 | 24.1 | 29.1 | 33.1 | 38.1 | 40.9 | 44.9 | 48.5 | 52.5 | 61.73 |
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H | 250 | 270 | 280 | 310 | 380 | 430 | 480 | 560 | 630 | 700 | 750 | 850 | - |
9.9 | 10.6 | 11 | 12.3 | 15 | 17 | 18.9 | 22 | 24.9 | 27.6 | 29.6 | 33.5 | - |
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RF ( Kg ) | 69 | 72 | 85 | 145 | 310 | 500 | 772 | 1080 | 1380 | 1810 | 2400 | 3500 | - |
BW ( Kg ) | 60 | 65 | 70 | 120 | 265 | 385 | 600 | 860 | 1140 | 1510 | 2050 | 3100 | - |
Class 1500 |
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DN (mm) | 50 | 65 | 80 | 100 | 150 | 200 | 250 | 300 |
NPS(in) | 2 | 2-1/2 | 3 | 4 | 6 | 8 | 10 | 12 |
L(RF-BW) | 368 | 419 | 470 | 546 | 705 | 832 | 991 | 1130 |
14.5 | 16.5 | 18.5 | 21.5 | 27.8 | 32.8 | 39 | 44.5 |
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L(RTJ) | 371 | 422 | 473 | 549 | 711 | 841 | 1000 | 1146 |
14.6 | 16.6 | 18.6 | 21.6 | 28 | 33.1 | 39.4 | 45.1 |
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H | 250 | 270 | 300 | 330 | 450 | 500 | 560 |
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9.9 | 10.6 | 11.9 | 13 | 17.8 | 19.8 | 22.1 |
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RF ( Kg ) | 69 | 93 | 120 | 235 | 540 | 949 | 1270 |
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BW ( Kg ) | 60 | 78 | 90 | 185 | 450 | 785 | 1055 |
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