Material: Carbon steel, Stainless Steel
Size Range: DN15-DN300
Connection Options: Flange
Working Pressure: PN16 ~ PN160
Working Temperature:–29~560℃
Sealing Options:PTFE, Teflon, Graphite
Manufacturing Method: Carbon steel
Applicable Medium:Oil, Gas, Water
Manufacturing Standard:ANSI, ASME
A lift check valve is an automatic, non-return valve designed to prevent backflow in piping systems. It operates by using gravity or pressure to lift the disc off the seat when forward flow occurs and returns the disc to the seat when flow stops or reverses. Ideal for high-pressure and high-temperature applications, the lift check valve provides reliable sealing performance in horizontal or vertical installations, particularly with clean fluids such as water, steam, gas, or oil. Commonly used in power plants, chemical processes, and industrial pipelines, it is available in various pressure ratings and materials to suit demanding environments.
The product is designed according to the national standards GB 12235; design manufacture examination, the seal is reliable, the performance is fine.
Flap valve, the valve seat sealing surface of iron alloy or stellite (stellite) made of cobalt–based alloy welding, wear–resistant, high temperature, corrosion, anti–abrasion performance and long service life.
Can use a variety of standard piping flanges and flange sealing surface types to meet various project needs and user requirements.
Full range of body materials, gaskets can be based on actual working conditions or the user requests a reasonable option, can be applied to all kinds of pressure, temperature and medium conditions.
According to user requirements, design and manufacture of various structural forms and connection forms of non–return valves for various applications.
| Design and Manufacture | Structure Length | Pressure–Temperature Rating | Connection Flange | Test and Inspection |
|---|---|---|---|---|
| GB 12235 | GB 12221 | GB 12224 | JB/T74–94, GB9113, Hg20592–20635 | JB/T9092–1999, GB 13927 |
| No. | Project Name | PN16 | PN25 | PN40 | PN64 | PN100 | PN160 |
|---|---|---|---|---|---|---|---|
| 1 | Nominal Pressure PN (MPa) | 1.6 | 2.5 | 4.0 | 6.4 | 10 | 16 |
| 2 | Case Test Pressure (MPa) | 2.4 | 3.75 | 6.0 | 9.6 | 16 | 24 |
| 3 | High-Pressure Sealing Test (MPa) | 1.76 | 2.75 | 4.4 | 7.04 | 11 | 17.6 |
| 4 | Max. Working Pressure (MPa) | ≤1.6 | ≤2.5 | ≤4.0 | ≤6.4 | ≤10 | ≤16 |
| Part Name | Material Name | ||
|---|---|---|---|
| Body | WCB | 15CrMo | 20CrMoV |
| Valve Cover | WCB | 15CrMo | 20CrMoV |
| Disc | A105 | 15CrMo | 20CrMoV |
| Sealing Face | 20Cr13 | STL | STL |
| Shaft Pin | 20Cr13 | 35CrMoV | 35CrMoV |
| Gasket | 304 + Flexible Graphite | 304 + Flexible Graphite | 304 + Flexible Graphite |
| Bolt | 35CrMoA | 35CrMoA | 35CrMoA |
| Nut | 30CrMo | 30CrMo | 30CrMo |
| Applicable Temperature | –29~425℃ | –29~540℃ | –29~560℃ |
| Suitable Medium | Water, steam, oil, etc. | Water, steam, oil, etc. | Water, steam, oil, etc. |
| PN(MPa) | DN(mm) | L | D | D1 | D2 | b | Z–Φd | f | H | Weight (Kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1.6 | 50 | 230 | 160 | 125 | 100 | 16 | 4–Φ18 | 3 | 115 | 19 |
| 65 | 290 | 180 | 145 | 120 | 18 | 4–Φ18 | 3 | 140 | 24 | |
| 80 | 310 | 195 | 160 | 135 | 20 | 8–Φ18 | 3 | 170 | 30 | |
| 100 | 350 | 215 | 180 | 155 | 20 | 8–Φ18 | 3 | 200 | 41 | |
| 125 | 400 | 245 | 210 | 185 | 22 | 8–Φ18 | 3 | 230 | 58 | |
| 150 | 480 | 280 | 240 | 210 | 24 | 8–Φ23 | 3 | 255 | 83 | |
| 200 | 600 | 340 | 295 | 265 | 34 | 12–Φ23 | 3 | 285 | 100 | |
| 250 | 650 | 405 | 355 | 320 | 36 | 12–Φ25 | 3 | / | 115 | |
| 300 | 750 | 460 | 410 | 375 | 38 | 12–Φ25 | 4 | / | 328 | |
| 350 | 850 | 520 | 470 | 435 | 40 | 16–Φ25 | 4 | / | 450 | |
| 400 | 950 | 580 | 525 | 485 | 44 | 16–Φ30 | 4 | / | 570 | |
| 450 | 1100 | 640 | 585 | 545 | 46 | 20–Φ30 | 4 | / | 620 | |
| 500 | 1150 | 705 | 650 | 608 | 48 | 20–Φ34 | 4 | / | 765 | |
| 2.5 | 50 | 230 | 165 | 125 | 100 | 20 | 4–Φ18 | 3 | 115 | 20 |
| 65 | 290 | 185 | 145 | 120 | 22 | 8–Φ18 | 3 | 140 | 26 | |
| 80 | 310 | 200 | 160 | 135 | 22 | 8–Φ18 | 3 | 170 | 31 | |
| 100 | 350 | 235 | 190 | 160 | 24 | 8–Φ22 | 3 | 200 | 43 | |
| 125 | 400 | 270 | 220 | 185 | 28 | 8–Φ26 | 3 | 232 | 65 | |
| 150 | 480 | 300 | 250 | 210 | 30 | 8–Φ26 | 3 | 262 | 100 | |
| 200 | 600 | 360 | 310 | 275 | 34 | 12–Φ26 | 3 | 285 | 120 | |
| 250 | 650 | 425 | 330 | 332 | 38 | 12–Φ30 | 3 | / | / | |
| 300 | 750 | 485 | 430 | 390 | 44 | 16–Φ30 | 4 | / | 394 | |
| 350 | 850 | 520 | 490 | 458 | 48 | 16–Φ34 | 4 | / | 510 | |
| 400 | 950 | 610 | 550 | 505 | 52 | 16–Φ34 | 4 | / | 684 | |
| 450 | 1100 | 660 | 600 | 545 | 54 | 20–Φ34 | 4 | / | 744 | |
| 500 | 1150 | 730 | 660 | 600 | 58 | 20–Φ36 | 4 | / | 918 |
| PN(MPa) | DN(mm) | L | D | D1 | D2 | D6 | B | Z–Φd | D3 | H | Weight (Kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 4.0 | 32 | 180 | 140 | 100 | 76 | 66 | 18 | 4–Φ18 | 130 | 120 | 10 |
| 40 | 200 | 150 | 110 | 84 | 76 | 18 | 4–Φ18 | 150 | 140 | 15 | |
| 50 | 230 | 165 | 125 | 99 | 88 | 20 | 4–Φ18 | 160 | 150 | 22 | |
| 65 | 290 | 185 | 145 | 118 | 110 | 22 | 8–Φ18 | 180 | 160 | 28 | |
| 80 | 310 | 200 | 160 | 132 | 121 | 22 | 8–Φ18 | 200 | 175 | 36 | |
| 100 | 350 | 235 | 190 | 156 | 150 | 24 | 8–Φ22 | 235 | 200 | 58 | |
| 125 | 400 | 270 | 220 | 184 | 176 | 28 | 8–Φ26 | 265 | 225 | 73 | |
| 150 | 480 | 300 | 250 | 211 | 204 | 30 | 8–Φ26 | 320 | 262 | 104 | |
| 200 | 600 | 375 | 320 | 284 | 260 | 38 | 12–Φ30 | 400 | 315 | 150 | |
| 250 | 650 | / | / | / | / | / | / | / | / | 365 | |
| 300 | 750 | / | / | / | / | / | / | / | / | 510 | |
| 350 | 850 | / | / | / | / | / | / | / | / | 620 | |
| 400 | 950 | / | / | / | / | / | / | / | / | 715 | |
| 6.4 | 32 | 230 | 155 | 110 | 76 | 66 | 24 | 4–Φ22 | 140 | 162 | 12 |
| 40 | 260 | 170 | 125 | 84 | 76 | 24 | 4–Φ22 | 160 | 168 | 20 | |
| 50 | 300 | 180 | 135 | 99 | 88 | 26 | 4–Φ22 | 175 | 170 | 29 | |
| 65 | 340 | 205 | 160 | 118 | 110 | 28 | 8–Φ22 | 200 | 188 | 35 | |
| 80 | 380 | 215 | 170 | 132 | 121 | 30 | 8–Φ22 | 230 | 205 | 47 | |
| 100 | 430 | 250 | 200 | 156 | 150 | 32 | 8–Φ26 | 250 | 230 | 68 | |
| 125 | 500 | 295 | 240 | 184 | 176 | 36 | 8–Φ30 | 300 | 265 | 100 | |
| 150 | 550 | 345 | 280 | 211 | 204 | 38 | 8–Φ33 | 340 | 310 | 142 | |
| 200 | 600 | 415 | 345 | 284 | 260 | 42 | 12–Φ36 | 410 | 350 | 195 | |
| 250 | 775 | / | / | / | / | / | / | / | / | / | |
| 300 | 900 | / | / | / | / | / | / | / | / | / | |
| 350 | 1025 | / | / | / | / | / | / | / | / | / | |
| 400 | 1150 | / | / | / | / | / | / | / | / | / | |
| 10.0 | 32 | 230 | 155 | 110 | 76 | 66 | 24 | 4–Φ22 | 140 | / | 12 |
| 40 | 260 | 170 | 125 | 84 | 76 | 26 | 4–Φ22 | 160 | 155 | 20 | |
| 50 | 300 | 195 | 145 | 99 | 88 | 28 | 4–Φ26 | 175 | 170 | 29 | |
| 65 | 340 | 220 | 170 | 118 | 110 | 32 | 8–Φ26 | 200 | 190 | 42 | |
| 80 | 380 | 230 | 180 | 132 | 121 | 34 | 8–Φ26 | 230 | 235 | 63 | |
| 100 | 430 | 265 | 210 | 156 | 150 | 38 | 8–Φ30 | 250 | 265 | 88 | |
| 125 | 500 | 315 | 250 | 184 | 176 | 42 | 8–Φ33 | 300 | 310 | 100 | |
| 150 | 550 | 355 | 290 | 211 | 204 | 46 | 12–Φ33 | 350 | 350 | 120 | |
| 200 | 600 | 430 | 360 | 284 | 260 | 54 | 12–Φ36 | 430 | 400 | 145 | |
| 250 | 775 | / | / | / | / | / | / | / | / | / | |
| 300 | 900 | / | / | / | / | / | / | / | / | / | |
| 16.0 | 32 | 260 | 155 | 110 | 76 | 66 | 30 | 4–Φ22 | / | / | / |
| 40 | 260 | 170 | 125 | 84 | 76 | 32 | 4–Φ22 | / | / | / | |
| 50 | 300 | 195 | 145 | 99 | 88 | 36 | 8–Φ26 | / | / | / | |
| 65 | 340 | 220 | 170 | 118 | 110 | 44 | 8–Φ26 | / | / | / | |
| 80 | 380 | 230 | 180 | 132 | 121 | 46 | 8–Φ26 | / | / | / | |
| 100 | 430 | 265 | 210 | 156 | 150 | 48 | 8–Φ30 | / | / | / |
Lift check valves are designed to prevent reverse flow in piping systems by allowing fluid to flow in only one direction. They operate automatically and are typically installed in horizontal or vertical upward-flow pipelines. These valves are especially suitable for high-pressure and high-temperature applications where reliable backflow prevention is critical.
Petrochemical & Oil Refining:
Used in process lines to protect pumps, compressors, and other equipment from reverse flow damage in high-temperature and high-pressure systems.
Power Plants (Steam & Thermal):
Installed in steam lines and condensate systems to ensure unidirectional flow and prevent system overpressure or water hammer effects.
Industrial Water Supply Systems:
Ensures reliable operation in water treatment plants, cooling towers, and distribution pipelines by stopping backflow during pump shutdown.
Boiler Feed & Condensate Systems:
Maintains the proper flow direction of feedwater and condensate return in heating systems, avoiding equipment malfunction or corrosion.
Chemical Processing:
Ideal for transferring aggressive media, acids, or alkalis where flow integrity and non-contamination are essential.
Natural Gas & Air Systems:
Suitable for gas compressor lines and air separation units where sealing performance and pressure retention are critical.
Discover our premium valve solutions and boost your efficiency. Contact
us now to find out how we can support your needs with top-quality
products and exceptional service.
0577—86938599
© Tang Gong Valve Group. All Rights Reserved.
