Material: Carbon steel, Stainless Steel (SS304, SS316)
Size Range: 2″ to 12″ (DN50-DN300)
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
The American Standard Swing Check Valve is a one-way valve designed to prevent backflow in pipelines, ensuring that fluid only flows in a single direction. Its swing design allows the disc to lift and permit flow when the system is pressurized, while automatically closing when the flow reverses. This valve is built to meet American standards, making it suitable for applications requiring reliable performance and adherence to strict industry regulations.
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.
| Serial number |
project name |
parameter |
|||||
| 1 | Nominal pressurePN（MPa) | 150LB | 300LB | 600LB | 900LB | 1500LB | 2500LB |
| 2.0 | 5.0 | 10.0 | 15.0 | 25.0 | 42.0 | ||
| 2 | Shell strength test pressure | Nominal pressure at room temperature 1.5 times | |||||
| 3 | High pressure seal test pressure | Nominal pressure at room temperature 1.1 times | |||||
| 4 | Working pressure at room temperature | Press the ASME B16.34 pressure and temperature rating | |||||
Product specifications
| design standards | Structure length | Flange connection size | Test and inspection | Pressure and temperature reference |
| API6D/ASME B16.34 | ASME B16.10 | ASME B16.5 | API598/API6D | ASME B16.34 |
The main part material
| Part Name |
Material name |
|||||
| Body | A216 WCB | A217 WC6 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M |
| cap | 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 surface | 13Cr/STL | STL | Body / STL | Body / STL | Body / STL | Body / STL |
| Valve shaft | A182 F6a | A182 F11 | A182 F304 | A182 F316 | A182 F304L | A182 F316L |
| Gasket | Flexible graphite | Flexible graphite | Flexible graphite | Flexible graphite | Flexible graphite | Flexible graphite |
| bolt | A193 B7 | A193 B16 | A193 B8 | A193 B8M | A193 B8 | A193 B8M |
| Nut | A194 2H | A194 4 | A194 8 | A194 8M | A194 8 | A194 8M |
| Operating temperature | -29~425℃ | -29~540℃ | -46~425℃ | -46~425℃ | -46~425℃ | -46~425℃ |
| Suitable media | steam | steam | Weak corrosive | Weak corrosive | Weak corrosive | Weak corrosive |
The main shape and connection dimensions
|
Nominal diameter |
size |
||||||||
| m | in | L | D | D1 | D2 | b | f | n-Φd | H |
|
H44H-150Lb |
|||||||||
| 50 | 2 | 203 | 152 | 120.5 | 92 | 16 | 1.6 | 4-19 | 180 |
| 80 | 3 | 241 | 192 | 152.5 | 127 | 19 | 1.6 | 4-19 | 190 |
| 100 | 4 | 297 | 229 | 190.5 | 157 | 24 | 1.6 | 8-19 | 203 |
| 125 | 5 | 330 | 254 | 216 | 186 | 24 | 1.6 | 8-22 | 229 |
| 150 | 6 | 356 | 279 | 241.5 | 216 | 26 | 1.6 | 8-22 | 257 |
| 200 | 8 | 495 | 342 | 298.5 | 270 | 29 | 1.6 | 8-22 | 292 |
| 250 | 10 | 622 | 406 | 362 | 324 | 31 | 1.6 | 12-25 | 355 |
| 300 | 12 | 698 | 483 | 432 | 381 | 32 | 1.6 | 12-25 | 396 |
|
H44H-300Lb |
|||||||||
| 50 | 2 | 267 | 165 | 127 | 92 | 23 | 1.6 | 8-19 | 178 |
| 80 | 3 | 318 | 210 | 168.5 | 127 | 29 | 1.6 | 8-22 | 216 |
| 100 | 4 | 356 | 254 | 200 | 157 | 32 | 1.6 | 8-22 | 241 |
| 125 | 5 | 400 | 279 | 235 | 186 | 35 | 1.6 | 8-22 | 267 |
| 150 | 6 | 444 | 318 | 270 | 216 | 37 | 1.6 | 12-22 | 305 |
| 200 | 8 | 533 | 381 | 330 | 270 | 42 | 1.6 | 12-25 | 368 |
| 250 | 10 | 622 | 445 | 387 | 324 | 48 | 1.6 | 16-29 | 394 |
| 300 | 12 | 711 | 521 | 451 | 381 | 51 | 1.6 | 16-32 | 445 |
|
H44H-600Lb |
|||||||||
| 50 | 2 | 295 | 165 | 127 | 92 | 33 | 6.4 | 8-19 | 203 |
| 80 | 3 | 359 | 210 | 168 | 127 | 36 | 6.4 | 8-22 | 235 |
| 100 | 4 | 435 | 273 | 216 | 157 | 45 | 6.4 | 8-25 | 286 |
| 125 | 5 | 511 | 330 | 266.5 | 186 | 52 | 6.4 | 8-29 | 292 |
| 150 | 6 | 562 | 356 | 292 | 216 | 55 | 6.4 | 12-29 | 330 |
| 200 | 8 | 664 | 419 | 349 | 270 | 63 | 6.4 | 12-32 | 381 |
| 250 | 10 | 791 | 510 | 432 | 324 | 71 | 6.4 | 16-35 | 457 |
| 300 | 12 | 842 | 559 | 489 | 381 | 74 | 6.4 | 20-35 | 584 |
Water Treatment: Used to control water flow and prevent contamination in municipal and industrial water systems.
Oil and Gas: Ensures one-way flow in pipelines, protecting equipment in oil refineries and natural gas processing.
Chemical Processing: Maintains the integrity of flow direction in chemical plants, preventing backflow of potentially corrosive substances.
HVAC Systems: Regulates fluid flow in heating and cooling systems.
Power Generation: Suitable for cooling water lines and other high-pressure applications in power plants.
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