The gas welded ball valve is a key valve device specifically designed for natural gas transmission pipeline systems. It combines the rapid opening and closing characteristics of a ball valve with the reliability of a welded connection, playing a vital role in the natural gas industry. Its main functions are controlling the flow of natural gas and cutting off or regulating the medium within pipelines.
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Gas Welded Ball Valve Technical parameters
Design and manufacturing:API 6D, GB/T 12237
The structural length:GB/T 12221
Connection forms:HG/T 20592-20605, GB/T 9112-9124
Inspection and test:GB/T 13927
Caliber: 1/2″ ~ 48″ (DN15 ~ DN1200)
Pressure temporature level:GB/T 12224, ASME B16.34
Drive mode:Worm Gear
Pressure: PN16 ~ PN25
Gas Welded Ball Valve Main Parts Material List:
| No. | Part Name | Material Type | Material Grade | No. | Part Name | Material Type | Material Grade |
|---|---|---|---|---|---|---|---|
| 1 | Body | Carbon Steel | ST37.8 | 7 | Support | Stainless Steel | - |
| 2 | Stem Chamber | Carbon Steel | Fe52DP | 8 | Screw | Steel | - |
| 3 | Ball | Stainless Steel | AISI 304 | 9 | O-Sealing Ring | Synthetic Rubber | FPM |
| 4 | Stem | Stainless Steel | AISI 303 | 10 | Gasket | Teflon | PTFE |
| 5 | Seal Ring | Teflon | PTFE | 11 | Floor Clip | Cast Steel | AISI 304 |
| 6 | Bevel Washer | Spring Steel | - | 12 | Handle | Galvanized Steel | - |
Custom-designed natural gas welded ball valve drawings for a Saudi customer
Gas Welded Ball Valve Main External and Connection Dimension:
| DN | PN | L | D | D1 | D2 | H | B | C | H1 |
|---|---|---|---|---|---|---|---|---|---|
| 10 | 16 25 40 |
230 | 10 | 17.2 | 33.7 | 98 | 145 | 22 | |
| 15 | 230 | 10 | 21.3 | 33.7 | 98 | 145 | 22 | ||
| 20 | 230 | 15 | 26.9 | 42.4 | 103 | 145 | 23 | ||
| 25 | 230 | 20 | 33.7 | 48.3 | 118 | 145 | 34 | ||
| 32 | 260 | 25 | 42.4 | 60.3 | 121 | 145 | 33 | ||
| 40 | 260 | 32 | 48.3 | 76.1 | 120 | 190 | 43 | ||
| 50 | 300 | 40 | 60.3 | 88.9 | 127 | 190 | 44 | ||
| 65 | 300 | 50 | 76.1 | 114.3 | 170 | 280 | 71 | ||
| 80 | 300 | 65 | 88.9 | 139.7 | 185 | 280 | 77 | ||
| 100 | 16 25 |
325 | 80 | 114.3 | 168.3 | 210 | 280 | 102 | |
| 125 | 325 | 100 | 139.7 | 177.8 | 253 | 400 | 101 | ||
| 150 | 350 | 125 | 168.3 | 219.1 | 273 | 600 | 107 | ||
| 200 | 400 | 150 | 219.1 | 273 | 315 | 900 | 123 | ||
| 250 | 530 | 200 | 273 | 355.6 | 398 | 1200 | 122 | ||
| 300 | 550 | 250 | 323.9 | 457 | 465 | 280 | 193 | 155 | |
| 350 | 650 | 300 | 355.6 | 508 | 530 | 325 | 150 | 187 | |
| 400 | 760 | 350 | 406.4 | 610 | 530 | 466 | 175 | 221 | |
| 500 | 914 | 400 | 508 | 680 | 630 | 466 | 175 | 211 | |
| 600 | 1067 | 500 | 610 | 830 | 762 | 466 | 175 | 259 | |
| 700 | 1346 | 590 | 711 | 982 | 830 | 507 | |||
| 800 | 1524 | 690 | 813 | 1086 | 910 | 624 | |||
| 900 | 1727 | 790 | 914 | 1245 | 1025 | 844 | |||
| 1000 | 1750 | 890 | 1016 | 1394 | 1165 | 881 | |||
| 1200 | 2050 | 1190 | 1219 | 1576 | 1289 | 1092 |
Gas Welded Ball Valve Features
Fully Welded Structure
The valve body and pipeline are integrated using a welding process, completely eliminating the risk of leakage from flange connections. Suitable for high-pressure (Class 600 and above) and long-distance pipelines.
Corrosion Resistance and Hydrogen Sulfide Resistance
The valve body and key components are made of corrosion-resistant materials such as stainless steel and duplex steel, and the seals are made of PTFE or reinforced nylon, which can resist the erosion of acidic gases (such as H₂S) in natural gas.
Wide Temperature Range Adaptability
Operating temperature range covers -196 to 600°C (depending on material selection), meeting the requirements of both low-temperature and high-temperature liquefied natural gas (LNG) applications.
Optimized Sealing Performance
The ball is mirror-polished, and the valve seat adopts a metal-polymer composite structure (such as PTFE + metal), combined with a butterfly gasket spring design, to achieve bidirectional zero-leakage sealing.
Gas Welded Ball Valve Applications
Urban Gas Transmission and Distribution Systems:
In urban gas transmission and distribution networks, welded ball valves for natural gas are used to control the distribution and transmission of natural gas, regulate pressure and flow within the pipelines, and ensure the safety of gas use for residential and commercial users.
Long-Distance Natural Gas Pipelines:
Long-distance natural gas pipelines involve long distances and high pressures, placing extremely high demands on the sealing performance and reliability of valves. Welded ball valves for natural gas meet the operating requirements of long-distance pipelines and are used for pipeline shut-off, segmentation, and maintenance operations.
Natural Gas Processing Plants:
In natural gas processing plants, welded ball valves for natural gas are used to control various process flows, such as desulfurization, dehydration, and dehydrocarbonization, ensuring the smooth operation of the natural gas processing process.
Industrial Gas Supply:
In industries such as chemical, steel, and ceramics, natural gas is an important energy source and raw material, requiring a stable supply. Welded ball valves for natural gas are used in industrial gas pipeline systems to control the supply and pressure of natural gas, ensuring the normal operation of industrial production.
Gas Welded Ball Valve factory
