Piston Check Valves
SCV Valve manufactures a premium array of check valves. Our products are manufactured and tested in accordance with respective API, ASME, and ANSI standards.
SCV Piston Check Valves are quiet operating valves that effectively prevent backflow. The “flapperless” design is gentle on the seat as the piston rises and lowers with increased and decreased flow rates.
The SCV designs offers many features and options beneficial for oil, liquid gas, and liquid applications.
| DESIGN & MANUFACTURING STANDARDS | |
|---|---|
| Basic Design | API 6D |
| Wall Thickness | API 6D |
| Face-to-Face Dimensions | As stated |
| Flange End Dimensions | ANSI/ASME 16.5 |
| Butt-Weld End Dimensions | ANSI/ASME B16.25 |
| Inspection and Testing | API 6D |
DIMENSIONAL DATA (See below)
Class: 150; Sizes: 2" - 24"
Class: 300; Sizes: 2" - 16"
Class: 600; Sizes: 2" - 24"
Class: 900; Sizes: 2" - 12"
Class: 1500; Sizes: 2" - 12"
Class: 2500; Sizes: 2" - 12"
Dimensional Data
Piston Check Valve Bill of Materials
| No. | Part | WCC |
|---|---|---|
| 1 | Body | A216 WCC |
| 2 | Bonnet | A105 |
| 3 | Piston | A105+Ni-Trid+St. 6 |
| 4 | Seat | A105+St. 6 |
| 5 | Cage | A105+ENP |
| 6 | Piston Ring | PEEK/Glass Filled |
| 7 | Stud | A193 B7M |
| 8 | Heavy Hex Nut | A193 2HM |
| 9 | O-ring | Viton AED |
| 10 | Bonnet Gasket | SS/Graphite |
| 11 | Vent Fitting | 316 SS |
| 12 | Ball Check | 316 SS |
| 13 | Orifice Fitting | 316 SS |
| 14 | Lift Lug | Steel |
| 15 | Spring | X-750 |
| All piston check valves 2” thru 6”, in all pressures, comes standard with a X-750 spring installed. Note: Available in other materials upon request. | ||
Piston Check Valves - API 6D Sizes: 2" - 24" Class: 150
| SIZE | IN | 2 | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MM | 50 | 80 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | |
| A - RF | IN | 8.0 | 9.5 | 11.5 | 16 | 19.5 | 24.5 | 27.5 | 31 | 36 | 38.5 | 38.5 | 51 |
| MM | 203 | 241 | 292 | 406 | 495 | 622 | 699 | 787 | 914 | 978 | 978 | 1295 | |
| H1 | IN | 3.25 | 4.875 | 5 | 6.75 | 9.25 | 11.75 | 13.25 | 14.875 | 17 | / | / | / |
| MM | 83 | 124 | 127 | 171 | 235 | 298 | 337 | 378 | 432 | / | / | / | |
| H2 | IN | 7.0 | 8.35 | 10.23 | 14.56 | 17.83 | 22.48 | 25.51 | 27.25 | 30.125 | / | / | / |
| MM | 178 | 212 | 260 | 370 | 451 | 571 | 648 | 692 | 765 | / | / | / | |
| WEIGHT (RF) |
LB | 64 | 124 | 201 | 332 | 610 | 1040 | 1328 | 2010 | 2480 | / | / | / |
| KG | 29 | 56 | 91 | 151 | 277 | 472 | 602 | 912 | 1125 | / | / | / |
Piston Check Valves - API 6D Sizes: 2" - 16" Class: 300
| SIZE | IN | 2 | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MM | 50 | 80 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | |
| A-RF | IN | 10.25 | 14.75 | 17.625 | 19.375 | 22.5 | 29.625 | 32 | 35.25 | 39.125 | / | / | / |
| MM | 260 | 375 | 448 | 492 | 572 | 752 | 813 | 895 | 994 | / | / | / | |
| A- BW | IN | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR | / | / | / |
| MM | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR | / | / | / | |
| H1 | IN | 3.25 | 4.875 | 5 | 6.75 | 9.25 | 11.75 | 13.25 | 14.875 | 17 | / | / | / |
| MM | 83 | 124 | 127 | 171 | 235 | 298 | 337 | 378 | 432 | / | / | / | |
| H2 | IN | 8.5 | 10.25 | 12.5 | 17.5 | 20.125 | 23.75 | 24.375 | 27.25 | 30.125 | / | / | / |
| MM | 216 | 260 | 318 | 445 | 511 | 603 | 619 | 692 | 765 | / | / | / | |
| WEIGHT (RF) |
LB | 80 | 155 | 250 | 415 | 750 | 1300 | 1660 | 2500 | 3100 | / | / | / |
| KG | 36 | 70 | 114 | 187 | 341 | 591 | 755 | 1136 | 1409 | / | / | / | |
| AUR = Available Upon Request | |||||||||||||
Piston Check Valves - API 6D Sizes: 2" - 24" Class: 600
| SIZE | NPS | 2 | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DN | 50 | 80 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | |
| A - RF | IN | 11 | 14.75 | 18.5 | 20.75 | 24 | 30.88 | 33.625 | 37 | 41.25 | 46 | 55.5 | 60 |
| MM | 279 | 375 | 470 | 527 | 610 | 784 | 854 | 940 | 1048 | 1168 | 1410 | 1524 | |
| A - RTJ | IN | 11.375 | 14.875 | 18.625 | 20.875 | 24.125 | 31 | 33.75 | 37.125 | 41.375 | 46.125 | 55.75 | 60.125 |
| MM | 283 | 378 | 461 | 530 | 613 | 787 | 857 | 943 | 1051 | 1172 | 1413 | 1527 | |
| A - BW | IN | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR |
| MM | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR | AUR | |
| H1 | IN | 3.25 | 5.25 | 5.375 | 7 | 9.25 | 11.75 | 13.125 | 14.875 | 17 | 19.25 | 20.875 | 22.125 |
| MM | 83 | 133 | 137 | 178 | 235 | 298 | 333 | 378 | 432 | 489 | 530 | 561 | |
| H2 | IN | 8.5 | 10.25 | 12.125 | 18 | 20.25 | 24.25 | 25.125 | 28.125 | 31.25 | 32.875 | 35.25 | 38.78 |
| MM | 216 | 260 | 308 | 457 | 514 | 616 | 638 | 714 | 794 | 835 | 895 | 985 | |
| WGT (RF) |
LB | 71 | 136 | 215 | 485 | 782 | 1291 | 1880 | 2391 | 3788 | / | 5871 | 8507 |
| KG | 32 | 62 | 98 | 220 | 355 | 586 | 853 | 1084 | 1718 | / | 2663 | 3858 | |
| AUR = Available Upon Request | |||||||||||||
Piston Check Valves - API 6D Sizes: 2" - 12" Class: 900
| SIZE | NPS | 2 | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DN | 50 | 80 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | |
| A - RF | IN | / | 14.875 | 19.375 | 21.875 | 24.875 | 31.375 | 33.875 | / | / | / | / | / |
| MM | / | 378 | 492 | 556 | 632 | 797 | 860 | / | / | / | / | / | |
| A - RTJ | IN | / | 15 | 19.5 | 22 | 25 | 31.5 | 33.125 | / | / | / | / | / |
| MM | / | 381 | 495 | 559 | 635 | 800 | 857 | / | / | / | / | / | |
| A - BW | IN | / | AUR | AUR | AUR | AUR | AUR | AUR | / | / | / | / | / |
| MM | / | AUR | AUR | AUR | AUR | AUR | AUR | / | / | / | / | / | |
| H1 | IN | / | 5.25 | 5.375 | 7 | 9.25 | 11.75 | 13.125 | / | / | / | / | / |
| MM | / | 133 | 137 | 178 | 235 | 298 | 333 | / | / | / | / | / | |
| H2 | IN | / | 10.25 | 12.125 | 18 | 20.25 | 24.25 | 25.125 | / | / | / | / | / |
| MM | / | 260 | 308 | 457 | 514 | 616 | 638 | / | / | / | / | / | |
| WGT (RF) |
LB | / | 175 | 290 | 550 | 810 | 1650 | 2450 | / | / | / | / | / |
| KG | / | 72 | 129 | 268 | 430 | 751 | 1044 | / | / | / | / | / | |
| AUR = Available Upon Request | |||||||||||||
Piston Check Valves - API 6D Sizes: 2" - 12" Class: 1500
| SIZE | IN | 2 | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MM | 50 | 80 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | |
| A - RF | IN | 13.625 | 17.25 | 20.25 | 24 | 32.375 | 34.375 | 41 | / | / | / | / | / |
| MM | 346 | 438 | 514 | 610 | 822 | 873 | 1041 | / | / | / | / | / | |
| A - RTJ | IN | 13.75 | 17.325 | 20.375 | 24.25 | 32.75 | 35 | 41.675 | / | / | / | / | / |
| MM | 349 | 440 | 518 | 616 | 832 | 889 | 1059 | / | / | / | / | / | |
| A - BW | IN | AUR | AUR | AUR | AUR | AUR | AUR | AUR | / | / | / | / | / |
| MM | AUR | AUR | AUR | AUR | AUR | AUR | AUR | / | / | / | / | / | |
| H1 | IN | 3.25 | 5.25 | 5.375 | 7 | 9.25 | 11.75 | 13.125 | / | / | / | / | / |
| MM | 83 | 133 | 137 | 178 | 235 | 298 | 333 | / | / | / | / | / | |
| H2 | IN | 8.5 | 10.25 | 12.125 | 18 | 20.25 | 24.25 | 25.125 | / | / | / | / | / |
| MM | 216 | 260 | 308 | 457 | 514 | 616 | 638 | / | / | / | / | / | |
| WEIGHT (RF) |
LB | 111 | 207 | 362 | 803 | 1320 | 2183 | 2301 | / | / | / | / | / |
| KG | 50 | 94 | 164 | 364 | 599 | 990 | 1044 | / | / | / | / | / | |
| AUR = Available Upon Request | |||||||||||||
Piston Check Valves - API 6D Sizes: 2" - 12" Class: 2500
| SIZE | NPS | 2 | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DN | 50 | 80 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | |
| A - RF | IN | 14.875 | 20.25 | 23.125 | 32 | 37.375 | / | / | / | / | / | / | / |
| MM | 378 | 512 | 587 | 813 | 949 | / | / | / | / | / | / | / | |
| A - RTJ | IN | 15 | 20.5 | 23.5 | 32.5 | 38 | / | / | / | / | / | / | / |
| MM | 381 | 521 | 597 | 826 | 965 | / | / | / | / | / | / | / | |
| A - BW | IN | AUR | AUR | AUR | AUR | AUR | / | / | / | / | / | / | / |
| MM | AUR | AUR | AUR | AUR | AUR | / | / | / | / | / | / | / | |
| H1 | IN | 3.25 | 5.25 | 5.375 | 7 | 9.25 | / | / | / | / | / | / | / |
| MM | 83 | 133 | 137 | 178 | 235 | / | / | / | / | / | / | / | |
| H2 | IN | 8.5 | 10.25 | 12.125 | 18 | 20.25 | / | / | / | / | / | / | / |
| MM | 216 | 260 | 308 | 457 | 514 | / | / | / | / | / | / | / | |
| WEIGHT (RF) |
LB | 151 | 320 | 513 | 1327 | 2068 | / | / | / | / | / | / | / |
| KG | 68 | 145 | 233 | 602 | 938 | / | / | / | / | / | / | / | |
| AUR - Available Upon Request | |||||||||||||