贯流式止回阀又称单向阀或逆止阀,启闭件靠介质流动和力量自行开启或关闭,以防止介质倒流的阀门叫止回阀。止回阀属于自动阀类,主要用于介质单向流动的管道上,只允许介质向一个方向流动,以防止发生事故。
贯流式止回阀主要特点:
1. 流线型流道,介质不绕流,阀门流阻小,节省能源。
2. 采用特殊密封结构,无论阀后压力的高低,阀门都关闭严密,密封性能好。克服了一般止回阀在低背压时密封性能差的缺点。
3. 采用浮动的阀瓣结构,能自动补偿因安装和使用中磨损所引起的误差,保证密封面紧密贴合,提高了密封性能。
4. 启闭行程短,并能自动复位无冲击,在较小的流速下,阀门即可全开,关闭时间短。
5. 阀门不受安装位置限制,可以水平、垂直及任意角度安装。
主要零件材质及参数
产品材料 | WCB系列 | 304系列 | 304L系列 | 316系列 | 316L系列 | 321系列 | |
主要零件材料 | 阀体 | WCB | CF8 | CF3 | CF8M | CF3M | 0Cr18Ni10Ti |
支架 | WCB | CF8 | CF3 | CF8M | CF3M | 0Cr18Ni10Ti | |
弹簧 | 304 | 304 | 316 | 316 | 316L | 316 | |
阀瓣 | WCB | CF8 | CF3 | CF8M | CF3M | 0Cr18Ni10Ti | |
适用工况 | 适用介质 | 水、油品、蒸汽 | 硝酸腐蚀性介质 | 醋酸腐蚀性介质 | |||
适用温度 | -29~425℃ | -28~300℃ | |||||
应用规范 | 设计制造按 | GB/T12235 | |||||
法兰尺寸按 | HG 20592 | ||||||
检验试验按 | JB/T 9092 | ||||||
公称压力 | 1.0~1.6MPa |
PN1.6MPa 连接尺寸
DN | L | D | D1 | D2 | b | f | Z-φd |
15 | 100 | 95 | 65 | 46 | 14 | 2 | 4-φ14 |
20 | 110 | 105 | 75 | 56 | 16 | 2 | 4-φ14 |
25 | 120 | 115 | 85 | 65 | 16 | 2 | 4-φ14 |
32 | 130 | 140 | 100 | 76 | 18 | 2 | 4-φ18 |
40 | 130 | 150 | 110 | 84 | 18 | 2 | 4-φ18 |
50 | 140 | 165 | 125 | 99 | 20 | 2 | 4-φ18 |
65 | 165 | 185 | 145 | 119 | 20 | 2 | 4-φ18 |
80 | 190 | 200 | 160 | 132 | 20 | 2 | 8-φ18 |
100 | 210 | 220 | 180 | 156 | 22 | 2 | 8-φ18 |
125 | 240 | 250 | 210 | 184 | 22 | 2 | 8-φ18 |
150 | 280 | 285 | 240 | 211 | 24 | 2 | 8-φ22 |
200 | 340 | 340 | 295 | 266 | 24 | 2 | 12-φ22 |
250 | 400 | 405 | 355 | 319 | 26 | 2 | 12-φ26 |
300 | 460 | 460 | 410 | 370 | 28 | 2 | 12-φ26 |
350 | 530 | 520 | 470 | 429 | 30 | 2 | 16-φ26 |
400 | 600 | 580 | 525 | 480 | 32 | 2 | 16-φ30 |
450 | 660 | 640 | 585 | 548 | 34 | 2 | 20-φ30 |
500 | 730 | 715 | 650 | 609 | 34 | 2 | 20-φ33 |
600 | 860 | 840 | 770 | 720 | 36 | 2 | 20-φ36 |
PN2.5MPa 连接尺寸
DN | L | D | D1 | D2 | b | f | Z-φd |
15 | 100 | 95 | 65 | 46 | 14 | 2 | 4-φ14 |
20 | 110 | 105 | 75 | 56 | 16 | 2 | 4-φ14 |
25 | 120 | 115 | 85 | 65 | 16 | 2 | 4-φ14 |
32 | 130 | 140 | 100 | 76 | 18 | 2 | 4-φ18 |
40 | 130 | 150 | 110 | 84 | 18 | 2 | 4-φ18 |
50 | 140 | 165 | 125 | 99 | 20 | 2 | 4-φ18 |
65 | 165 | 185 | 145 | 118 | 22 | 2 | 8-φ18 |
80 | 190 | 200 | 160 | 132 | 24 | 2 | 8-φ18 |
100 | 210 | 235 | 190 | 156 | 24 | 2 | 8-φ22 |
125 | 240 | 270 | 220 | 184 | 26 | 2 | 8-φ26 |
150 | 280 | 300 | 250 | 211 | 28 | 2 | 8-φ26 |
200 | 340 | 360 | 310 | 274 | 30 | 2 | 12-φ26 |
250 | 400 | 425 | 370 | 330 | 32 | 2 | 12-φ30 |
300 | 460 | 485 | 430 | 389 | 34 | 2 | 16-φ30 |
350 | 530 | 555 | 490 | 448 | 38 | 2 | 16-φ33 |
400 | 600 | 620 | 550 | 503 | 40 | 2 | 16-φ36 |
450 | 660 | 670 | 600 | 548 | 42 | 2 | 20-φ36 |
500 | 730 | 730 | 660 | 609 | 44 | 2 | 20-φ36 |
600 | 860 | 845 | 770 | 720 | 46 | 2 | 20-φ39 |
PN4.0MPa 连接尺寸
DN | L | D | D1 | D2 | D6 | f1 | b | f | Z-φd |
15 | 100 | 95 | 65 | 46 | 40 | 3 | 14 | 4 | 4-φ14 |
20 | 110 | 105 | 75 | 56 | 51 | 3 | 16 | 4 | 4-φ14 |
25 | 120 | 115 | 85 | 65 | 58 | 3 | 16 | 4 | 4-φ14 |
32 | 130 | 140 | 100 | 76 | 66 | 3 | 18 | 4 | 4-φ18 |
40 | 130 | 150 | 110 | 84 | 76 | 3 | 18 | 4 | 4-φ18 |
50 | 140 | 165 | 125 | 99 | 88 | 3 | 20 | 4 | 4-φ18 |
65 | 165 | 185 | 145 | 118 | 110 | 3 | 22 | 4 | 8-φ18 |
80 | 190 | 200 | 160 | 132 | 121 | 3 | 24 | 4 | 8-φ18 |
100 | 210 | 235 | 190 | 156 | 150 | 3.5 | 24 | 4.5 | 8-φ22 |
125 | 240 | 270 | 220 | 184 | 176 | 3.5 | 26 | 4.5 | 8-φ26 |
150 | 280 | 300 | 250 | 211 | 204 | 3.5 | 28 | 4.5 | 8-φ26 |
200 | 340 | 375 | 320 | 284 | 260 | 3.5 | 34 | 4.5 | 12-φ30 |
250 | 400 | 450 | 385 | 345 | 313 | 3.5 | 38 | 4.5 | 12-φ33 |
300 | 460 | 515 | 450 | 409 | 364 | 3.5 | 42 | 4.5 | 16-φ33 |
350 | 530 | 580 | 510 | 465 | 422 | 4 | 46 | 5 | 16-φ36 |
400 | 600 | 660 | 585 | 535 | 474 | 4 | 50 | 5 | 16-φ39 |
450 | 660 | 685 | 610 | 560 | 524 | 4 | 57 | 5 | 20-φ39 |
500 | 730 | 755 | 670 | 615 | 576 | 4 | 57 | 5 | 20-φ42 |
600 | 860 | 890 | 795 | 735 | 676 | 4 | 72 | 5 | 20-φ48 |
PN6.4MPa 连接尺寸
DN | L | D | D1 | D2 | D6 | f1 | b | f | Z-φd |
15 | 120 | 105 | 75 | 46 | 40 | 3 | 20 | 4 | 4-φ14 |
20 | 140 | 130 | 90 | 56 | 51 | 3 | 20 | 4 | 4-φ18 |
25 | 150 | 140 | 100 | 65 | 58 | 3 | 24 | 4 | 4-φ18 |
32 | 170 | 155 | 110 | 76 | 66 | 3 | 24 | 4 | 4-φ22 |
40 | 180 | 170 | 125 | 84 | 76 | 3 | 26 | 4 | 4-φ22 |
50 | 190 | 180 | 135 | 99 | 88 | 3 | 26 | 4 | 4-φ22 |
65 | 210 | 205 | 160 | 118 | 110 | 3 | 26 | 4 | 8-φ22 |
80 | 240 | 215 | 170 | 132 | 121 | 3 | 28 | 4 | 8-φ22 |
100 | 290 | 250 | 200 | 156 | 150 | 3.5 | 30 | 4.5 | 8-φ26 |
125 | 330 | 295 | 240 | 184 | 176 | 3.5 | 34 | 4.5 | 8-φ30 |
150 | 350 | 345 | 280 | 211 | 204 | 3.5 | 36 | 4.5 | 8-φ33 |
200 | 430 | 415 | 345 | 284 | 260 | 3.5 | 42 | 4.5 | 12-φ36 |
250 | 510 | 470 | 400 | 345 | 313 | 3.5 | 46 | 4.5 | 12-φ36 |
300 | 570 | 530 | 460 | 409 | 364 | 3.5 | 52 | 4.5 | 16-φ36 |
350 | 650 | 600 | 525 | 465 | 422 | 4 | 56 | 5 | 16-φ39 |
400 | 710 | 670 | 585 | 535 | 474 | 4 | 60 | 5 | 16-φ42 |
PN10.0MPa 连接尺寸
DN | L | D | D1 | D2 | P | E | F | b | f | Z-φd |
15 | 120 | 105 | 75 | 55 | 35 | 6.5 | 9 | 20 | 6.5 | 4-φ14 |
20 | 140 | 130 | 90 | 68 | 45 | 6.5 | 9 | 20 | 6.5 | 4-φ18 |
25 | 150 | 140 | 100 | 78 | 50 | 6.5 | 9 | 24 | 6.5 | 4-φ18 |
32 | 170 | 155 | 110 | 86 | 65 | 6.5 | 9 | 24 | 6.5 | 4-φ22 |
40 | 180 | 170 | 125 | 102 | 75 | 6.5 | 9 | 26 | 6.5 | 4-φ22 |
50 | 190 | 195 | 145 | 116 | 85 | 8 | 12 | 28 | 8 | 4-φ26 |
65 | 210 | 220 | 170 | 140 | 100 | 8 | 12 | 30 | 8 | 8-φ26 |
80 | 240 | 230 | 180 , | 150 | 115 | 8 | 12 | 32 | 8 | 8-φ26 |
100 | 290 | 265 | 210 | 176 | 145 | 8 | 12 | 36 | 8 | 8-φ30 |
125 | 330 | 315 | 250 | 212 | 175 | 8 | 12 | 40 | 8 | 8-φ33 |
150 | 350 | 355 | 290 | 250 | 205 | 8 | 12 | 44 | 8 | 12-φ33 |
200 | 430 | 430 | 360 | 312 | 265 | 8 | 12 | 52 | 8 | 12-φ36 |
250 | 510 | 505 | 430 | 376 | 320 | 8 | 12 | 60 | 8 | 12-φ39 |
300 | 570 | 585 | 500 | 448 | 375 | 8 | 12 | 68 | 8 | 16-φ42 |
350 | 650 | 655 | 560 | 505 | 420 | 11 | 17 | 74 | 11 | 16-φ48 |
400 | 710 | 715 | 620 | 565 | 480 | 11 | 17 | 82 | 11 | 16-φ48 |
PN16.0MPa 连接尺寸
DN | L | D | D1 | D2 | P | E | F | b | f | Z-φd |
15 | 130 | 105 | 75 | 58 | 35 | 6.5 | 9 | 26 | 6.5 | 4-φ14 |
20 | 150 | 130 | 90 | 70 | 45 | 6.5 | 9 | 30 | 6.5 | 4-φ18 |
25 | 160 | 140 | 100 | 80 | 50 | 6.5 | 9 | 32 | 6.5 | 4-φ18 |
32 | 180 | 155 | 110 | 86 | 65 | 6.5 | 9 | 34 | 6.5 | 4-φ22 |
40 | 190 | 170 | 125 | 102 | 75 | 6.5 | 9 | 36 | 6.5 | 4-φ22 |
50 | 220 | 195 | 145 | 118 | 95 | 8 | 12 | 38 | 8 | 4-φ26 |
65 | 250 | 220 | 170 | 142 | 110 | 8 | 12 | 42 | 8 | 8-φ26 |
80 | 280 | 230 | 180 | 152 | 130 | 8 | 12 | 46 | 8 | 8-φ26 |
100 | 300 | 265 | 210 | 178 | 160 | 8 | 12 | 52 | 8 | 8-φ30 |
125 | 350 | 315 | 250 | 215 | 190 | 8 | 12 | 56 | 8 | 8-φ33 |
150 | 380 | 355 | 290 | 255 | 205 | 10 | 14 | 62 | 10 | 12-φ33 |
200 | 470 | 430 | 360 | 322 | 275 | 11 | 17 | 66 | 11 | 12-φ36 |
250 | 550 | 515 | 430 | 388 | 330 | 11 | 17 | 76 | 11 | 12-φ42 |
300 | 610 | 585 | 500 | 456 | 380 | 14 | 23 | 88 | 14 | 16-φ42 |
主要零件材质及参数
产品材料 | WCB系列 | 304系列 | 304L系列 | 316系列 | 316L系列 | 321系列 | |
主要零件材料 | 阀体 | WCB | CF8 | CF3 | CF8M | CF3M | 0Cr18Ni10Ti |
支架 | WCB | CF8 | CF3 | CF8M | CF3M | 0Cr18Ni10Ti | |
弹簧 | 304 | 304 | 316 | 316 | 316L | 316 | |
阀瓣 | WCB | CF8 | CF3 | CF8M | CF3M | 0Cr18Ni10Ti | |
适用工况 | 适用介质 | 水、油品、蒸汽 | 硝酸腐蚀性介质 | 醋酸腐蚀性介质 | |||
适用温度 | -29~425℃ | -28~300℃ | |||||
应用规范 | 设计制造按 | API 600 | |||||
法兰尺寸按 | ANSI B16.5 | ||||||
检验试验按 | API 598 | ||||||
公称压力 | 150LB~900LB |
150LB 连接尺寸
DN | L | D | D1 | D2 | b | f | Z-φd |
1/2" | 100 | 90 | 60.5 | 35 | 11.2 | 1.6 | 4-φ16 |
3/4" | 110 | 100 | 70 | 43 | 11.2 | 1.6 | 4-φ16 |
1" | 120 | 110 | 79.5 | 51 | 12 | 1.6 | 4-φ16 |
11/4" | 130 | 115 | 89 | 63.5 | 13.5 | 1.6 | 4-φ16 |
11/2" | 130 | 125 | 98.5 | 73 | 15 | 1.6 | 4-φ16 |
2" | 140 | 150 | 120.5 | 92 | 15.9 | 1.6 | 4-φ18 |
21/2" | 165 | 180 | 139.5 | 105 | 17.5 | 1.6 | 4-φ18 |
3" | 190 | 190 | 152.5 | 127 | 19.1 | 1.6 | 4-φ18 |
4" | 210 | 230 | 190.5 | 157 | 23.9 | 1.6 | 8-φ18 |
5" | 240 | 255 | 216 | 186 | 23.9 | 1.6 | 8-φ22 |
6" | 280 | 280 | 241.5 | 216 | 25.4 | 1.6 | 8-φ22 |
8" | 340 | 345 | 298.5 | 270 | 28.6 | 1.6 | 8-φ22 |
10" | 400 | 405 | 362 | 324 | 30.2 | 1.6 | 12-φ26 |
12" | 460 | 485 | 432 | 381 | 31.8 | 1.6 | 12-φ26 |
14" | 530 | 535 | 476 | 413 | 35 | 1.6 | 12-φ30 |
16" | 600 | 595 | 540 | 470 | 36.6 | 1.6 | 16-φ30 |
18" | 660 | 635 | 578 | 533.5 | 39.7 | 1.6 | 16-φ33 |
20" | 730 | 700 | 635 | 584 | 42.9 | 1.6 | 20-φ33 |
24" | 860 | 815 | 749.5 | 692 | 47.7 | 1.6 | 20-φ36 |
300LB 连接尺寸
DN | L | D | D1 | D2 | b | f | Z-φd |
1/2" | 100 | 95 | 66.5 | 35 | 15 | 1.6 | 4-φ16 |
3/4" | 110 | 115 | 82.5 | 43 | 16 | 1.6 | 4-φ18 |
1" | 120 | 125 | 89 | 51 | 18 | 1.6 | 4-φ18 |
11/4" | 130 | 135 | 98.5 | 63.5 | 19.5 | 1.6 | 4-φ18 |
11/2" | 130 | 155 | 114.5 | 73 | 21 | 1.6 | 4-φ22 |
2" | 140 | 165 | 127 | 92 | 22.3 | 1.6 | 8-φ18 |
21/2" | 165 | 190 | 149 | 105 | 25.4 | 1.6 | 8-φ22 |
3" | 190 | 210 | 168.5 | 127 | 28.6 | 1.6 | 8-φ22 |
4" | 210 | 255 | 200 | 157 | 31.8 | 1.6 | 8-φ22 |
5" | 290 | 280 | 235 | 186 | 35 | 1.6 | 8-φ22 |
6" | 320 | 320 | 270 | 216 | 36.6 | 1.6 | 12-φ22 |
8" | 400 | 380 | 330 | 270 | 41.3 | 1.6 | 12-φ26 |
10" | 460 | 445 | 387 | 324 | 47.7 | 1.6 | 16-φ30 |
12" | 550 | 520 | 451 | 381 | 50.8 | 1.6 | 16-φ33 |
14" | 600 | 585 | 514.5 | 413 | 54 | 1.6 | 20-φ33 |
16" | 680 | 650 | 571.5 | 470 | 57.2 | 1.6 | 20-φ36 |
18" | 800 | 710 | 628.5 | 533.5 | 60.4 | 1.6 | 24-φ36 |
20" | 900 | 775 | 686 | 584 | 63.5 | 1.6 | 24-φ36 |
24" | 1100 | 915 | 813 | 692 | 69.9 | 1.6 | 24-φ42 |
600LB 连接尺寸
DN | L | D | D1 | D2 | b | f | Z-φd |
1/2" | 120 | 95 | 66.5 | 35 | 15 | 6.4 | 4-φ16 |
3/4" | 140 | 115 | 82.5 | 43 | 16 | 6.4 | 4-φ18 |
1" | 150 | 125 | 89 | 51 | 18 | 6.4 | 4-φ18 |
11/4" | 170 | 135 | 98.5 | 63.5 | 21 | 6.4 | 4-φ18 |
11/2" | 180 | 155 | 114.5 | 73 | 23 | 6.4 | 4-φ22 |
2" | 190 | 165 | 127 | 92 | 25.4 | 6.4 | 8-φ18 |
21/2" | 210 | 190 | 149 | 105 | 28.6 | 6.4 | 8-φ22 |
3" | 240 | 210 | 168.5 | 127 | 31.8 | 6.4 | 8-φ22 |
4" | 290 | 275 | 216 | 157 | 38.1 | 6.4 | 8-φ26 |
5" | 330 | 330 | 267 | 186 | 44.5 | 6.4 | 8-φ30 |
6" | 350 | 355 | 292 | 216 | 47.7 | 6.4 | 12-φ30 |
8" | 430 | 420 | 349 | 270 | 55.6 | 6.4 | 12-φ33 |
10" | 510 | 510 | 432 | 324 | 63.5 | 6.4 | 16-φ36 |
12" | 570 | 560 | 489 | 381 | 66.7 | 6.4 | 20-φ36 |
14" | 650 | 605 | 527 | 413 | 69.9 | 6.4 | 20-φ39 |
16" | 710 | 685 | 603 | 470 | 76.2 | 6.4 | 20-φ42 |
18" | 800 | 745 | 654 | 533.5 | 83 | 6.4 | 20-φ45 |
20" | 940 | 815 | 724 | 584 | 89 | 6.4 | 24-φ45 |
24" | 1100 | 940 | 838 | 692 | 102 | 6.4 | 24-φ52 |
900LB 连接尺寸
DN | L | D | D1 | D2 | P | E | F | b | f | Z-φd |
1/2" | 130 | 120 | 82.5 | 60.5 | 39.67 | 6.35 | 8.74 | 22.5 | 6.35 | 4-φ22 |
3/4" | 150 | 130 | 89 | 66.5 | 44.45 | 6.35 | 8.74 | 25.5 | 6.35 | 4-φ22 |
1" | 160 | 150 | 101.5 | 71.5 | 50.8 | 6.35 | 8.74 | 29 | 6.35 | 4-φ26 |
11/4" | 180 | 160 | 111 | 81 | 60.33 | 6.35 | 8.74 | 29 | 6.35 | 4-φ26 |
11/2" | 190 | 180 | 124 | 92 | 68.27 | 6.35 | 8.74 | 32 | 6.35 | 4-φ30 |
2" | 220 | 215 | 165 | 124 | 95.25 | 7.92 | 11.91 | 38.5 | 7.92 | 8-φ26 |
21/2" | 250 | 245 | 190.5 | 137 | 107.95 | 7.92 | 11.91 | 41.5 | 7.92 | 8-φ30 |
3" | 280 | 240 | 190.5 | 156 | 123.83 | 7.92 | 11.91 | 38.5 | 7.92 | 8-φ26 |
4" | 300 | 290 | 235 | 181 | 149.2 | 7.92 | 11.91 | 44.5 | 7.92 | 8-φ33 |
5" | 350 | 350 | 279.5 | 216 | 190.98 | 7.92 | 11.91 | 51 | 7.92 | 8-φ36 |
6" | 380 | 380 | 317.5 | 241 | 212.12 | 7.92 | 11.91 | 56 | 7.92 | 12-φ33 |
8" | 470 | 470 | 393.7 | 308 | 269.88 | 7.92 | 11.91 | 63.5 | 7.92 | 12-φ39 |
10" | 550 | 545 | 469.9 | 362 | 323.85 | 7.92 | 11.91 | 70 | 7.92 | 16-φ39 |
12" | 610 | 610 | 533.4 | 419 | 381 | 7.92 | 11.91 | 79.5 | 7.92 | 20-φ39 |
14" | 680 | 640 | 558.8 | 467 | 419.1 | 11.13 | 16.66 | 86 | 11.13 | 20-φ42 |
16" | 770 | 705 | 615.9 | 524 | 469.9 | 11.13 | 16.66 | 89 | 11.13 | 20-φ45 |
18" | 870 | 785 | 685.8 | 594 | 533.4 | 12.70 | 19.84 | 102 | 12.70 | 20-φ52 |
20" | 1000 | 855 | 749.3 | 648 | 584.2 | 12.70 | 19.84 | 108 | 12.70 | 24-φ56 |
24" | 1300 | 1040 | 901.7 | 772 | 692.15 | 15.88 | 26.97 | 140 | 15.88 | 24-φ68 |