Fully welded ball valve
Fully Welded Ball Valve
Fully welded ball valve body is welded from steel pipe. The ball gasket is made of reinforced polytetrafluoroethylene. The valve stem adopts explosion-proof design. Temperature range: -60-200℃.
Fully welded ball valve are widely used in the field of long-distance pipeline such as natural gas, petroleum, heating, chemical and thermoelectric pipeline network.
Product information
Size: Full bore & standard bore DN50 (2″) ~ DN 1,400 (56″)
Pressure Rating: ANSI Class 150 ~2,500, PN 16 ~ 420
Working temperature: -29℃(-20℉) ~ +200℃(392℉)
Applicable media: oil/gasoline, LNG/LPG, petrochemical, steel mills, heating pipelines, etc.
Operation mode: handle, gear (vertical/horizontal), motorized valve body
Material: Carbon Steel ST37, A106-B, STPG 370, A105, ASTM A516-60, A216-WCB or equivalent. Stainless steel 304 or 316 (on request)
Ball material: Stainless steel 304 or 316 grade
Seat material: Metal seat with polymer seal, PTFE, RTFE, Viton, Nylon, Peek, etc.
Application Areas
City gas: gas output pipelines, main lines and various branch lines, etc.
Centralized heat supply: large heating equipment output pipelines, trunk lines, branch lines.
Heat exchangers: pipelines and various circuits to open and close.
Iron and steel mills: all kinds of fluid pipelines, exhaust gas discharge pipelines, gas and heat pipelines, fuel pipelines.
Ball valves are used in all kinds of industrial equipment: all kinds of heat treatment pipeline, all kinds of industrial gas and heat pipeline.
This type of fully welded ball valve is designed according to API 6D, with continuous improvement to meet the open/close.
The body is made up of three pieces welded lighter, higher hardness, compact structure, not only diminishing the flange between bonnet and body, but also decrease the overall dimension and outside leakage point.
| NO | Parts | Standard | Stainless steel | Weak acid | Low temperature |
|---|---|---|---|---|---|
| 1 | Body | ASTM A105 | ASTM A182 F316 | ASTM A105 | ASTM A350 LF2 |
| 2 | Left, right body | ASTM A105 | ASTM A182 F316 | ASTM A105 | ASTM A350 LF2 |
| 3 | Spring | Stainless steel | Stainless steel | Stainless steel | Stainless steel |
| 4 | Seat | ASTM A105/ENP | ASTM A182 F316 | ASTM A105/ENP | ASTM A350 LF2/ENP |
| 5 | Seal ring | RPTFE | RPTFE | RPTFE | RPTFE |
| 6 | O-ring | Fluoro rubber | Fluoro rubber | Fluoro rubber | Fluoro rubber |
| 7 | Ball | ASTM A105/ENP | ASTM A182 F316 | ASTM A105/ENP | ASTM A305 LF2/ENP |
| 8 | Bearing | SF-1 | SF-1 | SF-1 | SF-1 |
| 9 | Thrust bearing | SF-1 | SF-1 | SF-1 | SF-1 |
| 10 | Anti-static spring | Stainless steel | Stainless steel | Stainless steel | Stainless steel |
| 11 | Bearing | SF-1 | SF-1 | SF-1 | SF-1 |
| 12 | Anti-static spring | SF-1 | SF-1 | SF-1 | SF-1 |
| 13 | Stem | ASTM A182 F6a | ASTM A182 F316 | ASTM A182 F6a | ASTM A350 LF2/ENP |
| 14 | Worm gear | Assembly | Assembly | Assembly | Assembly |
| 15 | Key | ANSI 1045 | ANSI 1045 | ANSI 1045 | ANSI 1045 |
| 16 | Bolt | ASTM A193 B7 | ASTM A193 B8 | ASTM A193 B7M | ASTM A320 L7M |
| 17 | Bolt | ASTM A193 B7 | ASTM A193 B8 | ASTM A193 B7M | ASTM A320 L7M |
| 18 | Nut | ASTM A194 2H | ASTM A194 8 | ASTM A194 2HM | ASTM A194 4 |
| 19 | Sealant injection valve | Assembly | Assembly | Assembly | Assembly |
| 20 | Lug | A3 | 304 | A3 | A3 |
| 21 | Foot stool | A3 | 304 | A3 | A3 |
| 22 | Support plate | ASTM A105 | ASTM A182 F316 | ASTM A105 | ASTM A350 LF2 |
| 23 | Pin | A276-420 | 304 | A276-420 | 304 |
| 24 | Position pin | A276-420 | 304 | A276-420 | 304 |
| 25 | O-ring | Fluororubber | Fluororubber | Fluororubber | Fluororubber |
| 26 | Stem gasket | SF-1 | SF-1 | SF-1 | SF-1 |
| 27 | O-ring | Fluororubber | Fluororubber | Fluororubber | Fluororubber |
| 28 | Connection plate | ASTM A105 | ASTM A182 F316 | ASTM A105 | ASTM A350 LF2 |
| 29 | O-ring | Fluororubber | Fluororubber | Fluororubber | Fluororubber |
| 30 | Gland | ASTM A105 | ASTM A182 F316 | ASTM A105 | ASTM A350 LF2 |
| 31 | Bolt | ASTM A193 B7 | ASTM A193 B8 | ASTM A193 B7M | ASTM A320 L7M |
| 32 | Bolt | ASTM A193 B7 | ASTM A193 B8 | ASTM A193 B7M | ASTM A320 L7M |
Our company brought in advanced technology and automatic welder to weld with minimized deformation of the valves.
Various standard materials are used to improve the valves to meet customers’ request. Fully welded ball valve have been used widely in transportation of coal gas, gas, district heat supply network, offset plat and oil field, etc.
Technical requirements of fully welded ball valve
Technical requirements
| Design standard | Design standard | API 6D, ASME B16.34 | DIN 3357-1, EN 12516-1 | API 6D |
|---|---|---|---|---|
| End connection | ASME B16.5, ASME B16.47 | DIN 2542-2545, EN 1092 | GOST 33259 | |
| Structure length | API 6D, ASME B16.10 | DIN 3202 | ASME B16.10, GOST 3706 | |
| Test and inspect | API 6D, API 598 | DIN 3230/3, EN 12266 | GOST 9544 | |
| Applied conditions | Applied medium | Natural gas, liquefied petroleum gas | ||
| Applied temperature | -29 ℃ ~150℃ | |||
| Operation | Worm gear, Pneumatic, Electric, Pneumatic-hydraulic | |||
Pressure test
| Class | Max. applied Pressure(MPa) | Pressure test(MPa) | ||
|---|---|---|---|---|
| Shell test | Max. Applied pressure | Low pressure seal | ||
| 150 | 2.0 | 3.0 | 2.2 | 0.6 |
| 300 | 5.0 | 7.5 | 5.5 | |
| 600 | 10.0 | 15.0 | 11.0 | |
| 900 | 15.0 | 23.0 | 16.5 | |
| 1500 | 25.0 | 37.0 | 27.5 | |