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 | G2 | G3 | H | T |
| 300 | 25 | 686 | 300 | 508 | 376 | 325 | 470 | 12.5 |
| 350 | 25 | 760 | 350 | 580 | 404 | 377 | 480 | 13.5 |
| 400 | 25 | 890 | 400 | 660 | 456 | 426 | 540 | 14 |
| 500 | 25 | 1060 | 500 | 800 | 560 | 530 | 620 | 15 |
| 600 | 25 | 1310 | 590 | 960 | 655 | 630 | 750 | 20 |
| 700 | 25 | 1530 | 685 | 1120 | 770 | 721 | 870 | 18 |
| 800 | 25 | 1730 | 785 | 1250 | 860 | 820 | 960 | 18 |
Worm gear torque
| Nominal Diameter | DN300 | DN350 | DN400 | DN500 | DN600 | DN700 | DN800 |
| torque/.MI | 300 | 360 | 400 | 480 | 720 | 830 | 960 |
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"
Product Parts List
| No. | name | specifications | No. | name | specifications |
| 1 | Upper valve stem sleeve | 150*Φ133 | 11 | take over | Φ560*254 |
| 2 | Upper cover | Φ92*21*内孔Φ60 | 12 | sphere | Φ500*800 |
| 3 | Nut | M8*18 | 13 | Lower valve stem | Φ133*50 |
| 4 | valve seat | 外Φ85*内Φ80*40 | 14 | Lower cover | Φ133*20
|
| 5 | Body | Q800*780 | 15 | Lower valve sleeve | Φ133*50 |
| 6 | SUPPORT RING | Q544*26 | 16 | lower bearing | 外Φ60*内Φ55*40 |
| 7 | Worm gear disc | Φ301*30 | 17 | ring | 190*87*18.6 |
| 8 | o-ring | Φ75*5 | 18 | Tripod | 738.5*155*18.6 |
| 9 | sealing ring | Φ530*5.7 | 19 | melt | 70*18 |
| 10 | spring | Φ9.5*20 | 20 | Upper valve stem sleeve | Φ133*150
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