Gas Welded Ball Valve
- High-Level Sealing, No Leakage: A fully welded body eliminates all external leak paths. The seat often uses a combination of spring pre-loading and O-rings to maintain gas-tightness even during pipeline pressure fluctuations.
- Anti-Static & Fire-Safe Design: An integrated anti-static device dissipates static electricity generated by friction. It also features a fire-safe design that maintains an effective seal after a fire, preventing gas leakage from worsening the situation.
- Corrosion-Resistant Materials: Special H2S-resistant materials are selected to withstand corrosive media potentially present in gas, extending the valve's service life.
- Safe & Reliable Operation: Often equipped with a vent valve to safely bleed off pressure from the valve cavity before maintenance.
- Suitable for Buried Service: Like other fully welded ball valves, it supports stem extension and direct burial installation to meet the needs of urban underground pipeline networks.
The Gas Welded Ball Valve is a special type of fully welded ball valve engineered specifically for gas media pipelines, such as natural gas, city gas, and LPG. Considering the flammable, explosive, and sometimes corrosive nature of gas, this valve is designed with an utmost focus on absolute sealing reliability and long-term operational safety. It features a fully welded body to eliminate external leakage and is typically equipped with anti-static and fire-safe structures, as well as materials resistant to H2S corrosion. This ensures safe shut-off or connection of gas lines under various demanding and emergency conditions, making it an indispensable safety device in gas transmission and distribution systems.
Basic Parameters
| Parameter | Value |
|---|---|
| Size | DN15-DN800 |
| Working Pressure | PN25-PN800 |
| Temperature Range | -29°C ~ 120°C |
Materials of Main Parts
| Part Name | Material (Q361F-16C/P, Q361F-25C/P) | Material (Q41F-16C/P, Q41F-25C/P) |
|---|---|---|
| Body | Cast Steel | Cast Steel |
| Ball | Cr-Ni-Ti Steel | Cr-Ni-Mo-Ti Steel |
| Stem | Cr-Ni-Ti Steel | Cr-Ni-Mo-Ti Steel |
| Seal Ring | Teflon | Teflon |
| Actuator | Cast Steel | Cast Steel |
No drawing available.
