Fully welded ball valve, the valve is composed of three independent forged parts that are welded together to form a single unit, ensuring that the ball valve is connected to the valve body without leakage under allowable working conditions. The product is mainly used in natural gas, petroleum, water and other media, suitable for pipeline use in residential heating, urban gas, petrochemicals, steel, shipbuilding, metallurgy, power stations, pressure regulating stations and other industries.
Product drawings
Connection size
| DN | PN | L | D | G1 | G3 | G4 | t | N-ΦD | h | T-e | ISO5211 | 备注 |
| 150 | 25 | 400 | 150 | 273 | 310 | 360 | 8 | 12-Φ30 | 107 | 34-2.5 | F14 |
|
| 200 | 25 | 530 | 200 | 375 | 370 | 425 | 8 | 12-Φ33 | 117 | 38-2.5 | F14 |
|
| 250 | 25 | 630 | 250 | 462 | 485 | 430 | 10 | 12-Φ33 | 129 | 42-2.5 | F16 | Double stage worm gear |
| 300 | 25 | 686 | 300 | 480 | 520 | 470 | 12 | 16-Φ39 | 129 | 50-4 | F16 | Double stage worm gear |
| 350 | 25 | 760 | 350 | 508 | 460 | 530 | 16.2 | 16-Φ39 | 135 | 50-4 | F16 | Double stage worm gear |
| 400 | 25 | 900 | 400 | 670 | 485 | 525 | 18 | 16-Φ30 | 135 | 32-3 | F30 | Double stage worm gear |
| 500 | 25 | 1050 | 500 | 813 | 615 | 660 | 23 | 20-Φ36 | 135 | 52-3 | F30 | Double stage worm gear |
| 600 | 25 | 1328 | 590 | 960 | 720 | 770 | 25 | 20-Φ36 | 135 | 52-3 | F30 | Double stage worm gear |
Worm torque
Nominal size
| DN150 | DN200 | DN250 | DN300 | DN350 | DN400 | DN500 | DN600 |
| torque/.MI | 200
| 260 | 310 | 300 | 360 | 400 | 480 | 720 |
design basis
1. The design of the valve shall comply with Q/320506 FDV01-20132: GB/T 12224-2005 "General Requirements for Steel Valves"
2. GB/T 12220-1989 "General Valve Marking"
3. GB/T 12223-2005 "Connection of Partial Rotary Valve Drive Devices"
4. JB/T 12006-2014 "Welded Ball Valves for Steel Pipes"
5. GB/T 37827-2019 "Welded Ball Valves for Urban Heating"
6. Flange surface standard: GB/T 9113
7. Flange end standard: GB/T 12221-2005
Product Parts List
| No. | name | Materials | No. | name | Materials |
| 1 | IGBT | 20# | 15 | lower bearing | Q235+PTFE |
| 2 |
|
| 16 | Stem | 2Cr13 |
| 3 | ball | SS304 | 17 | grommet | PTFE+C |
| 4 | sealing ring | PTFE+C | 18 | branch pipe | 20# |
| 5 | valve seat圈 | 20# | 19 | Upper bearing | Q235+PTFE |
| 6 | o-ring | 氟塑橡胶（FKM） | 20 | grommet | PTFE+C |
| 7 | disc spring | 50crv4 | 21 | o-ring | FKM |
| 8 | Rear valve seat | 20# | 22 | Stud | 8.8 |
| 9 | take over | 20# | 23 | Nut | 8 |
| 10 | bottom cover | 20# | 24 | spring washer | 45# |
| 11 | Hexagon socket head cap screw | 45# | 25 | Flange connection | 20 |
| 12 | 排污赛 | 45# | 26 | Axle clamp spring | 45# |
| 13 | o-ring | FKM | 27 | flat key | 45# |
| 14 | 底座 | 20# | 28 | driving device | QT450 |
