Material: Carbon steel, Stainless Steel (SS304, SS316)
Size Range: DN40-DN750
Connection Options: Flange
Working Pressure: Class 150-2500
Working Temperature: -46~540℃
Sealing Options: Flexible graphite
Manufacturing Method:Forging, Carbon steel
Applicable Medium:Oil, Gas, Water
Manufacturing Standard:ANSI, ASME, GB
MacoTango Valve’s ANSI swing check valves are designed and manufactured in full compliance with ANSI standards. Featuring a compact structure, aesthetic appearance, and excellent performance, ANSI swing check valves operate automatically based on the flow of the medium and are used to prevent backflow in pipelines. They are widely used in systems such as water supply, wastewater, chemical, petrochemical, and power generation. This type of check valve includes a hinge mechanism that allows the disc to close under its own weight or backpressure. Its main functions are to prevent media backflow, protect pumps and compressors from damage, and mitigate water hammer effects.
Reliable Non-Return Function: Designed to prevent reverse flow, protecting pumps, compressors, and other equipment from damage due to backflow.
Durable Construction: Made from high-quality materials like stainless steel or carbon steel, ensuring longevity in demanding applications.
Low-Pressure Drop: The swing design minimizes pressure loss, allowing efficient flow in open positions.
Flexible Sealing Options: Metal-to-metal or soft seals available to meet the needs of various applications and media types.
Meets Industry Standards: Complies with American standards for quality, safety, and performance.
| No. | Item Description | 150(Lb) | 300(Lb) | 600(Lb) | 900(Lb) | 1500(Lb) | 2500(Lb) |
|---|---|---|---|---|---|---|---|
| 1 | Nominal Pressure | 2.0 | 5.0 | 10.0 | 15.0 | 25.0 | 42.5 |
| 2 | Case Test Pressure | 3.0 | 7.5 | 15.0 | 22.5 | 37.5 | 67.5 |
| 3 | High-Pressure Sealing Test Pressure | 2.2 | 5.5 | 11.0 | 16.5 | 27.5 | 49.5 |
| 4 | Maximum Operating Pressure | <2.0 | <5.2 | <10.4 | <15.6 | <25.8 | <45.8 |
| Design Standard | Structure Length Standard | Flange Standard | Test & Inspection Standard | Pressure & Temperature Standard |
|---|---|---|---|---|
| BS1868 | ASME B16.10 | ASME B16.5 | API 598 | ASME B16.34 |
| Part Name | Material name | |||||
|---|---|---|---|---|---|---|
| Body | A216 WCB | A217 WC6 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M |
| Valve cover | A216 WCB | A217 WC6 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M |
| Valve plate | A216 WCB | A217 WC6 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M |
| Sealing face | 2Cr13 | STL | Integral / STL | Integral / STL | Integral / STL | Integral / STL |
| Shaft | A182 F6a | A182 F11 | A182 F304 | A182 F316 | A182 F304L | A182 F316L |
| Gasket | 304 + Graphite | 304 + Graphite | 304 + Graphite | 304 + Graphite | 304 + Graphite | 304 + Graphite |
| Stud bolt | A193 B7 | A193 B7 | A193 B8 | A193 B8M | A193 B8M | A193 B8M |
| Nut | A194 2H | A194 6 | A194 8 | A194 8M | A194 8M | A194 8M |
| Operating Temp. | –29°C ~ 425°C | –29°C ~ 540°C | –46°C ~ 425°C | –46°C ~ 425°C | –46°C ~ 425°C | –46°C ~ 425°C |
| Applicable Medium | Water, steam, oil | Water, steam | Weakly corrosive media | Weakly corrosive media | Weakly corrosive media | Weakly corrosive media |
Pressure Class: 150Lb–2500Lb
Drawing Reference: Dimensional layout showing valve structure with standard dimension markings.
| DN (mm) | DN (in) | L | D | D1 | D2 | b | z × Φd | H | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|
| 40 | 1½″ | 166 | 130 | 98.5 | 73 | 15 | 4 × Φ15 | 154 | – |
| 50 | 2″ | 203 | 150 | 120.6 | 92 | 19 | 4 × Φ19 | 161 | 17 |
| 65 | 2½″ | 216 | 180 | 139.7 | 105 | 22 | 4 × Φ19 | 180 | 23 |
| 80 | 3″ | 241 | 190 | 152.4 | 127 | 24 | 4 × Φ19 | 190 | 33 |
| 100 | 4″ | 292 | 230 | 190.5 | 157 | 24 | 8 × Φ19 | 203 | 44 |
| 125 | 5″ | 330 | 255 | 215.5 | 186 | 24 | 8 × Φ22 | 229 | 62 |
| 150 | 6″ | 356 | 280 | 241.3 | 216 | 25 | 8 × Φ22 | 257 | 78 |
| 200 | 8″ | 495 | 345 | 298.4 | 270 | 29 | 8 × Φ22 | 292 | 137 |
| 250 | 10″ | 622 | 405 | 362.0 | 324 | 30 | 12 × Φ25 | 355 | 207 |
| 300 | 12″ | 698 | 485 | 431.8 | 381 | 32 | 12 × Φ25 | 396 | 279 |
| 350 | 14″ | 787 | 535 | 476.2 | 413 | 35 | 12 × Φ29 | 445 | 387 |
| 400 | 16″ | 864 | 595 | 539.8 | 470 | 37 | 16 × Φ29 | 490 | 446 |
| 450 | 18″ | 978 | 635 | 577.8 | 533 | 40 | 16 × Φ32 | 520 | 621 |
| 500 | 20″ | 978 | 700 | 635.0 | 584 | 43 | 20 × Φ32 | 546 | 770 |
| 600 | 24″ | 1295 | 815 | 749.3 | 692 | 48 | 20 × Φ35 | 880 | 970 |
| 650 | 26″ | 1295 | 870 | 806.4 | 749 | 68 | 24 × Φ35 | 910 | 1276 |
| 700 | 28″ | 1448 | 925 | 863.6 | 800 | 71 | 28 × Φ35 | 935 | 1600 |
| 750 | 30″ | 1524 | 985 | 914.4 | 857 | 75 | 28 × Φ35 | 970 | 1990 |
| ANSI Swing Check Valve — Dimensions Data (Class 300) | |||||||||
| DN (mm) | DN (in) | L | D | D1 | D2 | b | z × Φd | H | Weight (kg) |
| 40 | – | 241 | 155 | 114.5 | 73 | 21 | 4 × Φ22 | 172 | – |
| 50 | 2″ | 267 | 165 | 127.0 | 92 | 22 | 8 × Φ19 | 178 | 20 |
| 65 | 2½″ | 292 | 190 | 149.4 | 105 | 26 | 8 × Φ22 | 190 | 24 |
| 80 | 3″ | 318 | 210 | 168.1 | 127 | 29 | 8 × Φ22 | 210 | 40 |
| 100 | 4″ | 356 | 255 | 200.2 | 157 | 32 | 8 × Φ22 | 241 | 51 |
| 125 | 5″ | 400 | 280 | 235.0 | 186 | 35 | 12 × Φ22 | 267 | 65 |
| 150 | 6″ | 444 | 320 | 269.7 | 216 | 37 | 12 × Φ25 | 306 | 90 |
| 200 | 8″ | 533 | 380 | 330.2 | 270 | 41 | 16 × Φ29 | 368 | 175 |
| 250 | 10″ | 622 | 445 | 387.4 | 324 | 48 | 16 × Φ32 | 394 | 210 |
| 300 | 12″ | 711 | 520 | 450.8 | 381 | 51 | 20 × Φ32 | 445 | 286 |
| 350 | 14″ | 838 | 585 | 514.4 | 413 | 54 | 20 × Φ35 | 470 | 400 |
| 400 | 16″ | 864 | 650 | 571.5 | 470 | 57 | 24 × Φ35 | 533 | 550 |
| 450 | 18″ | 978 | 710 | 628.8 | 533 | 64 | 24 × Φ38 | 584 | 700 |
| 500 | 20″ | 1016 | 775 | 685.8 | 584 | 64 | 24 × Φ41 | 610 | 870 |
| 600 | 24″ | 1346 | 915 | 812.8 | 692 | 70 | 28 × Φ44 | 860 | 1931 |
| 650 | 26″ | 1346 | 970 | 876.3 | 749 | 79 | 28 × Φ44 | 930 | 2375 |
| 700 | 28″ | 1499 | 1035 | 939.8 | 800 | 86 | 28 × Φ44 | 1163 | 2660 |
| 750 | 30″ | 1594 | 1095 | 996.9 | 857 | 92 | 28 × Φ48 | 1270 | 3230 |
| ANSI Swing Check Valve — Dimensions Data (Class 600) | |||||||||
| DN (mm) | DN (in) | L | D | D1 | D2 | b | z × Φd | H | Weight (kg) |
| 50 | 2″ | 292 | 165 | 127.0 | 92 | 25 | 8 × Φ19 | 203 | 34 |
| 65 | 2½″ | 330 | 190 | 149.4 | 105 | 29 | 8 × Φ22 | 229 | 45 |
| 80 | 3″ | 356 | 210 | 168.1 | 127 | 32 | 8 × Φ22 | 235 | 63 |
| 100 | 4″ | 432 | 273 | 215.9 | 157 | 38 | 8 × Φ25 | 286 | 114 |
| 125 | 5″ | 508 | 330 | 266.7 | 186 | 44 | 8 × Φ29 | 292 | 160 |
| 150 | 6″ | 559 | 355 | 292.1 | 216 | 48 | 12 × Φ29 | 330 | 207 |
| 200 | 8″ | 660 | 420 | 349.2 | 270 | 56 | 12 × Φ32 | 381 | 387 |
| 250 | 10″ | 787 | 510 | 431.8 | 324 | 64 | 16 × Φ35 | 457 | 580 |
| 300 | 12″ | 838 | 560 | 489.0 | 381 | 67 | 20 × Φ35 | 584 | 778 |
| 350 | 14″ | 889 | 605 | 527.0 | 413 | 70 | 20 × Φ38 | 635 | 985 |
| 400 | 16″ | 991 | 685 | 603.0 | 470 | 76 | 20 × Φ41 | 584 | 1320 |
| 450 | 18″ | 1092 | 745 | 654.1 | 533 | 83 | 20 × Φ44 | 752 | 1620 |
| 500 | 20″ | 1194 | 815 | 723.9 | 584 | 90 | 24 × Φ44 | 975 | 2120 |
| 600 | 24″ | 1397 | 940 | 838.2 | 692 | 102 | 24 × Φ51 | 1111 | 3100 |
| ANSI Swing Check Valve — Dimensions Data (Class 900) | ||||||||
|---|---|---|---|---|---|---|---|---|
| DN (mm) | DN (in) | L | D | D1 | b | z × Φd | H | Weight (kg) |
| 50 | 2″ | 372 | 215 | 95.2 | 15.1 | 8 × Φ25 | 216 | 40 |
| 65 | 2½″ | 422 | 245 | 108.0 | 190.5 | 8 × Φ29 | 254 | 60 |
| 80 | 3″ | 384 | 240 | 123.8 | 190.5 | 8 × Φ25 | 292 | 88 |
| 100 | 4″ | 461 | 290 | 149.2 | 235.0 | 8 × Φ32 | 318 | 122 |
| 125 | 5″ | 562 | 350 | 279.4 | 51 | 8 × Φ35 | 344 | 150 |
| 150 | 6″ | 613 | 380 | 317.5 | 56 | 12 × Φ32 | 368 | 200 |
| 200 | 8″ | 740 | 470 | 393.7 | 64 | 12 × Φ38 | 432 | 230 |
| 250 | 10″ | 842 | 545 | 469.9 | 70 | 16 × Φ38 | 546 | 860 |
| 300 | 12″ | 969 | 610 | 533.4 | 79 | 20 × Φ38 | 660 | 1390 |
| 350 | 14″ | 1029 | 640 | 558.8 | 86 | 20 × Φ41 | 782 | 1380 |
| 400 | 16″ | 1130 | 705 | 616.0 | 90 | 20 × Φ44 | 838 | 1900 |
| ANSI Swing Check Valve — Dimensions Data (Class 1500) | ||||||||
| DN (mm) | DN (in) | L | D | D1 | b | z × Φd | H | Weight (kg) |
| 65 | 2½″ | 419 | 245 | 190.5 | 41.5 | 8 × Φ29 | 193 | 57 |
| 80 | 3″ | 470 | 265 | 203.2 | 48.0 | 8 × Φ32 | 246 | 66 |
| 100 | 4″ | 546 | 310 | 241.3 | 54.0 | 8 × Φ35 | 288 | 87 |
| 125 | 5″ | 673 | 375 | 292.1 | 73.5 | 8 × Φ42 | 324 | 108 |
| 150 | 6″ | 705 | 395 | 317.5 | 83.0 | 12 × Φ39 | 373 | 175 |
| 200 | 8″ | 832 | 485 | 393.7 | 92.9 | 12 × Φ45 | 466 | 173 |
| 250 | 10″ | 991 | 585 | 482.6 | 108.0 | 12 × Φ51 | 536 | 216 |
| 300 | 12″ | 1130 | 675 | 571.5 | 124.0 | 16 × Φ54 | 857 | – |
| 350 | 14″ | 1257 | 750 | 635.0 | 133.0 | 16 × Φ61 | 950 | – |
| 400 | 16″ | 1384 | 825 | 704.9 | 146.0 | 16 × Φ67 | 1020 | – |
| ANSI Swing Check Valve — Dimensions Data (Class 2500) | ||||||||
| DN (mm) | DN (in) | L | D | D1 | b | z × Φd | H | Weight (kg) |
| 65 | 2½″ | 508 | 265 | 196.8 | 57.5 | 8 × Φ32 | 255 | 98 |
| 80 | 3″ | 578 | 305 | 228.6 | 67.0 | 8 × Φ35 | 315 | 120 |
| 100 | 4″ | 673 | 355 | 273.0 | 76.5 | 8 × Φ42 | 360 | 240 |
| 125 | 5″ | 794 | 420 | 323.8 | 92.5 | 8 × Φ48 | 418 | 410 |
| 150 | 6″ | 914 | 485 | 368.3 | 108.0 | 8 × Φ54 | 465 | 590 |
| 200 | 8″ | 1022 | 550 | 438.1 | 127.0 | 12 × Φ54 | 555 | 990 |
| 250 | 10″ | 1270 | 675 | 539.7 | 165.5 | 12 × Φ67 | 630 | 1250 |
| 300 | 12″ | 1422 | 760 | 619.3 | 184.0 | 12 × Φ73 | 1000 | 5500 |
API Swing Check Valves are widely used in pipelines to prevent reverse flow and protect critical equipment. Typical applications include:
Oil & Gas Industry: Upstream, midstream, and downstream systems to prevent backflow in crude oil, refined products, and gas pipelines.
Petrochemical Plants: Installed in process lines to avoid media reversal and equipment damage.
Power Generation: Applied in boiler feedwater systems, steam lines, and cooling water circuits to ensure unidirectional flow.
Water Treatment & Distribution: Used in municipal water systems and desalination plants to prevent contamination due to reverse flow.
Chemical Industry: Handles aggressive or hazardous fluids with corrosion-resistant materials for safe and reliable backflow control.
Marine & Offshore: Ensures flow integrity in ballast, bilge, and seawater cooling systems.
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