Check Valve
Cast Carbon Steel & Cast Stainless Steel
Size 2"-24", Class 150-2500
Design & Manufacturing Standard
- Basic Design API 600 & ANSI/ASME B 16.34
- Shell Wall Thickness API 600
- Face to Face Dimension ANSI/ASME B16.10
- Flange End Dimension ANSI/ASME B16.5
- Butt-Weld End Dimension ANSI/ASME B16.25
- Inspection & Testing API 568
Expanded View & Bill Materials | Check Valve Dimension
Check Valve Dimensions
A1 (Raised Face - RF)
A2 (RTJ)
A3 (Buttwelding End - BW)
A4 (Socket Welding - SW)
Class 150
Class 300
Class 600
Class 900
Class 1500
Class 2500
Class 150
| VALVE SIZE | A1 (RF) | A2 (RTJ) | A3 (BW) | A4 (SW) | |||||
| NPS | DN | In | mm | in | mm | in | mm | in | mm |
| 2 | 50 | 8.00 | 203 | 8.50 | 216 | 8.00 | 203 | 8.00 | 203 |
| 2.5 | 65 | 8.50 | 216 | 9.00 | 229 | 8.50 | 216 | 8.50 | 216 |
| 3 | 80 | 9.50 | 241 | 10.00 | 254 | 9.50 | 241 | 9.50 | 241 |
| 4 | 100 | 11.50 | 292 | 12.00 | 305 | 11.50 | 292 | 11.50 | 292 |
| 5 | 125 | 13.00 | 356 | 13.50 | 369 | 13.00 | 356 | 13.00 | 356 |
| 6 | 150 | 14.00 | 406 | 14.50 | 419 | 14.00 | 406 | 14.00 | 406 |
| 8 | 200 | 19.50 | 495 | 20.00 | 508 | 19.50 | 495 | 19.50 | 495 |
| 10 | 250 | 24.50 | 622 | 25.00 | 635 | 24.50 | 622 | 24.50 | 622 |
| 12 | 300 | 27.50 | 698 | 28.00 | 711 | 27.50 | 698 | 27.50 | 698 |
| 14 | 350 | 31.00 | 787 | 31.50 | 800 | 31.00 | 787 | 31.00 | 787 |
| 16 | 400 | 36.00 | 914 | 36.50 | 927 | 36.00 | 914 | 36.00 | 914 |
| 18 | 450 | 38.50 | 978 | 39.00 | 991 | 38.50 | 978 | 38.50 | 978 |
| 20 | 500 | 38.50 | 978 | 39.00 | 991 | 38.50 | 978 | 38.50 | 978 |
Class 300
| VALVE SIZE | A1 (RF) | A2 (RTJ) | A3 (BW) | A4 (SW) | |||||
| NPS | DN | In | mm | in | mm | in | mm | in | mm |
| 2 | 50 | 10.50 | 267 | 11.12 | 283 | 10.50 | 267 | 10.50 | 267 |
| 2.5 | 65 | 11.50 | 292 | 12.12 | 308 | 11.50 | 292 | 11.50 | 292 |
| 3 | 80 | 12.50 | 318 | 13.12 | 334 | 12.50 | 318 | 12.50 | 318 |
| 4 | 100 | 14.00 | 356 | 14.62 | 372 | 14.00 | 356 | 14.00 | 356 |
| 5 | 125 | 15.75 | 400 | 16.37 | 416 | 15.75 | 400 | 15.75 | 400 |
| 6 | 150 | 17.50 | 444 | 18.12 | 460 | 17.50 | 444 | 17.50 | 444 |
| 8 | 200 | 21.00 | 533 | 21.62 | 549 | 21.00 | 533 | 21.00 | 533 |
| 10 | 250 | 24.50 | 622 | 25.12 | 638 | 24.50 | 622 | 24.50 | 622 |
| 12 | 300 | 28.00 | 711 | 28.62 | 727 | 28.00 | 711 | 28.00 | 711 |
| 14 | 350 | 33.00 | 838 | 33.62 | 854 | 33.00 | 838 | 33.00 | 838 |
| 16 | 400 | 34.00 | 864 | 34.62 | 880 | 34.00 | 864 | 34.00 | 864 |
| 18 | 450 | 38.50 | 978 | 39.12 | 994 | 38.50 | 978 | 38.50 | 978 |
| 20 | 500 | 40.00 | 1016 | 40.62 | 1035 | 40.00 | 1016 | 40.00 | 1016 |
Class 600
| VALVE SIZE | A1 (RF) | A2 (RTJ) | A3 (BW) | A4 (SW) | |||||
| NPS | DN | In | mm | in | mm | in | mm | in | mm |
| 2 | 50 | 11.50 | 292 | 11.62 | 295 | 11.50 | 292 | 11.50 | 292 |
| 2.5 | 65 | 13.00 | 330 | 13.12 | 333 | 13.00 | 330 | 13.00 | 330 |
| 3 | 80 | 14.00 | 356 | 14.12 | 359 | 14.00 | 356 | 14.00 | 356 |
| 4 | 100 | 17.00 | 432 | 17.12 | 435 | 17.00 | 432 | 17.00 | 432 |
| 5 | 125 | 20.00 | 508 | 20.12 | 511 | 20.00 | 508 | 20.00 | 508 |
| 6 | 150 | 22.00 | 559 | 22.12 | 562 | 22.00 | 559 | 22.00 | 559 |
| 8 | 200 | 26.00 | 660 | 26.12 | 663 | 26.00 | 660 | 26.00 | 660 |
| 10 | 250 | 31.00 | 787 | 31.12 | 790 | 31.00 | 787 | 31.00 | 787 |
| 12 | 300 | 33.00 | 838 | 33.12 | 841 | 33.00 | 838 | 33.00 | 838 |
| 14 | 350 | 35.00 | 889 | 35.12 | 892 | 35.00 | 889 | 35.00 | 889 |
| 16 | 400 | 39.00 | 991 | 39.12 | 994 | 39.00 | 991 | 39.00 | 991 |
| 18 | 450 | 43.00 | 1092 | 43.12 | 1095 | 43.00 | 1092 | 43.00 | 1092 |
| 20 | 500 | 47.00 | 1194 | 47.25 | 1200 | 47.00 | 1194 | 47.00 | 1194 |
| 24 | 600 | 55.00 | 1397 | 55.38 | 1407 | 55.00 | 1397 | 55.00 | 1397 |
Class 900
| VALVE SIZE | A1 (RF) | A2 (RTJ) | A3 (BW) | A4 (SW) | |||||
| NPS | DN | In | mm | in | mm | in | mm | in | mm |
| 2 | 50 | 14.50 | 368 | 14.62 | 371 | 14.50 | 368 | 14.50 | 368 |
| 2.5 | 65 | 16.50 | 419 | 16.62 | 422 | 16.50 | 419 | 16.50 | 419 |
| 3 | 80 | 15.00 | 381 | 15.12 | 384 | 15.00 | 381 | 15.00 | 381 |
| 4 | 100 | 18.00 | 457 | 18.12 | 460 | 18.00 | 457 | 18.00 | 457 |
| 5 | 125 | 22.00 | 559 | 22.12 | 562 | 22.00 | 559 | 22.00 | 559 |
| 6 | 150 | 24.00 | 610 | 24.12 | 613 | 24.00 | 610 | 24.00 | 610 |
| 8 | 200 | 29.00 | 737 | 29.12 | 740 | 29.00 | 737 | 29.00 | 737 |
| 10 | 250 | 33.00 | 838 | 33.12 | 841 | 33.00 | 838 | 33.00 | 838 |
| 12 | 300 | 38.00 | 965 | 38.12 | 968 | 38.00 | 965 | 38.00 | 965 |
| 14 | 350 | 40.50 | 1029 | 40.88 | 1039 | 40.50 | 1029 | 40.50 | 1029 |
| 16 | 400 | 44.50 | 1130 | 44.88 | 1140 | 44.50 | 1130 | 44.50 | 1130 |
| 18 | 450 | 48.00 | 1219 | 48.50 | 1232 | 48.00 | 1219 | 48.00 | 1219 |
| 20 | 500 | 52.00 | 1321 | 52.50 | 1334 | 52.00 | 1321 | 52.00 | 1321 |
| 24 | 600 | 61.00 | 1549 | 61.75 | 1568 | 61.00 | 1549 | 61.00 | 1549 |
Class 1500
| VALVE SIZE | A1 (RF) | A2 (RTJ) | A3 (BW) | A4 (SW) | |||||
| NPS | DN | In | mm | in | mm | in | mm | in | mm |
| 2 | 50 | 14.50 | 368 | 14.62 | 371 | 14.50 | 368 | 14.50 | 368 |
| 2.5 | 65 | 16.50 | 419 | 16.62 | 422 | 16.50 | 419 | 16.50 | 419 |
| 3 | 80 | 18.50 | 470 | 18.62 | 473 | 18.50 | 470 | 18.50 | 470 |
| 4 | 100 | 21.50 | 546 | 21.62 | 549 | 21.50 | 546 | 21.50 | 546 |
| 5 | 125 | 26.50 | 673 | 26.62 | 676 | 26.50 | 673 | 26.50 | 673 |
| 6 | 150 | 27.75 | 705 | 28.00 | 711 | 27.75 | 705 | 27.75 | 705 |
| 8 | 200 | 32.75 | 832 | 33.13 | 842 | 32.75 | 832 | 32.75 | 832 |
| 10 | 250 | 39.00 | 991 | 39.38 | 1001 | 39.00 | 991 | 39.00 | 991 |
| 12 | 300 | 44.50 | 1130 | 45.12 | 1146 | 44.50 | 1130 | 44.50 | 1130 |
| 14 | 350 | 49.50 | 1257 | 50.25 | 1276 | 49.50 | 1257 | 49.50 | 1257 |
| 16 | 400 | 54.50 | 1384 | 55.38 | 1406 | 54.50 | 1384 | 54.50 | 1384 |
Class 2500
| VALVE SIZE | A1 (RF) | A2 (RTJ) | A3 (BW) | A4 (SW) | |||||
| NPS | DN | In | mm | in | mm | in | mm | in | mm |
| 2 | 50 | 17.75 | 451 | 17.87 | 454 | 17.75 | 451 | 17.75 | 451 |
| 2.5 | 65 | 20.00 | 508 | 20.25 | 514 | 20.00 | 508 | 20.00 | 508 |
| 3 | 80 | 22.75 | 578 | 23.00 | 584 | 22.75 | 578 | 22.75 | 578 |
| 4 | 100 | 26.50 | 673 | 26.88 | 683 | 26.50 | 673 | 26.50 | 673 |
| 5 | 125 | 31.25 | 794 | 31.75 | 807 | 31.25 | 794 | 31.25 | 794 |
| 6 | 150 | 36.00 | 914 | 36.50 | 927 | 36.00 | 914 | 36.00 | 914 |
| 8 | 200 | 40.25 | 1022 | 40.87 | 1038 | 40.25 | 1022 | 40.25 | 1022 |
| 10 | 250 | 50.00 | 1270 | 50.88 | 1292 | 50.00 | 1270 | 50.00 | 1270 |
| 12 | 300 | 56.00 | 1422 | 56.88 | 1444 | 56.00 | 1422 | 56.00 | 1422 |
Expanded View & Bill Materials | Check Valve Dimension