Buried all welded ball valve
The Buried All Welded Ball Valve is a specially designed pipeline valve engineered for underground installation and long-term operation in demanding environments. Featuring a fully welded valve body structure and extended stem design, this valve provides excellent sealing reliability, corrosion resistance, and maintenance-free performance for buried pipeline systems.
The all-welded construction eliminates potential leakage risks from traditional bolted body connections, making it highly suitable for critical underground applications where safety, durability, and operational reliability are essential. The extended stem and underground protection design allow convenient operation without excavation, while the robust structure ensures stable performance throughout the valve’s service life.
Designed according to international pipeline valve standards, the Buried All Welded Ball Valve offers low flow resistance, full bore capability, excellent pressure resistance, and reliable shut-off performance. It is widely used in natural gas transmission pipelines, oil transportation systems, urban gas networks, water supply projects, and other underground infrastructure.
We provide professional OEM and customization services to meet different project requirements, including customized valve sizes, materials, pressure ratings, buried installation structures, coating systems, sealing solutions, actuator configurations, and special operating conditions.
All products are manufactured under strict quality management systems and comply with international valve industry standards. We provide complete certifications, including ISO 9001, API 6D, CE, ASME, ISO 14313, and other applicable industry certifications, ensuring reliable quality and global application compatibility.
Buried all welded ball valve
We provide comprehensive OEM/ODM solutions, including:
Parameter Specifications
| Parameter | Specification |
|---|---|
| Product Name | Buried All Welded Ball Valve |
| Valve Type | Underground Fully Welded Ball Valve |
| Valve Structure | Floating Ball / Trunnion Mounted Ball |
| Design Type | Full Port / Reduced Port |
| Installation Type | Buried Underground Installation |
| Nominal Size | DN50–DN1200 / 2"–48" (Customized) |
| Pressure Rating | PN16–PN420 / Class 150–2500 |
| Body Material | Carbon Steel, Stainless Steel, Low Temperature Steel, Alloy Steel |
| Ball Material | Stainless Steel / Alloy Material |
| Stem Material | Stainless Steel / Alloy Steel |
| Seat Material | PTFE, RPTFE, PEEK, Metal Seat |
| Seal Material | PTFE, Graphite, FKM, Customized |
| Connection Type | Fully Welded Ends |
| Working Medium | Natural Gas, Oil, Water, Steam, Industrial Fluids |
| Working Temperature | -46°C to +200°C (Depending on Material Selection) |
| Flow Characteristic | Full Bore, Low Pressure Drop |
| Operation Type | Buried Gear / Extended Stem / Pneumatic / Electric |
| Sealing Performance | Tight Shut-Off, Double Block & Bleed Available |
| Leakage Standard | API 598 / ISO 5208 |
| Design Standard | API 6D / ISO 14313 / ASME B16.34 |
| Fire Safe Design | API 607 / API 6FA Available |
| Anti-Static Design | Available |
| Corrosion Protection | FBE / Epoxy / 3PE Coating / Customized |
| Stem Design | Extended Stem for Underground Operation |
| Inspection Standard | API / Customer Requirements |
| Pressure Test | Shell Test & Seat Test According to Standards |
| Certification | ISO 9001, API 6D, CE, ASME, ISO 14313 Available |
| OEM Service | Available |
| Customization Capability | Size, Material, Pressure, Coating, Stem Length, Actuator, Packaging |
Industry Applications
The Buried All Welded Ball Valve is widely used in underground pipeline systems requiring high reliability, leak prevention, and long-term maintenance-free operation.
✔ Fully welded structure for superior leak protection
✔ Designed specifically for underground installation
✔ Extended stem design enables easy operation and maintenance
✔ Excellent corrosion resistance with advanced coating systems
✔ High pressure resistance and mechanical strength
✔ Full bore design with low flow resistance
✔ Long service life with minimal maintenance requirements
✔ Suitable for critical pipeline infrastructure
✔ Flexible OEM customization capability
✔ Manufactured according to international pipeline valve standards
Material customization plan
Customized 316L stainless steel valves forGerman chemical enterprises. Resistant tostrong corrosion, suitable for their acidicmedium transportation systems, with aservice life extended to over 8 years.
Structural optimization design
For the Saudi desert project, the valve stemsealing structure was changed to a doublebellows design to address the leakage issuein the high-temperature and dustyenvironment, and it was highly recognizedby the customers.
Interface standard adaptation
Customized API 600 standard valves for acertain company in the United States. Theflange size is fully compatible with ANSIB16.5, ensuring zero error during on-siteinstallation and reducing the constructionperiod by 30%.
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