Jianqiao Valve Industry Group Co., Ltd. Jianqiao Valve Industry Group Co., Ltd.
Buried all welded ball valve

Buried all welded ball valve

Buried all welded ball valve
Buried all welded ball valve

Buried all welded ball valve
Buried all welded ball valve

Underground Fully Welded Ball Valve Buried Pipeline Ball Valve

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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

OEM Capability & Customization Services

We provide comprehensive OEM/ODM solutions, including:

  • Customized valve design according to customer drawings and technical specifications
  • Customized buried pipeline valve structures
  • Customized materials:
    • Carbon Steel
    • Stainless Steel
    • Low Temperature Carbon Steel
    • Alloy Steel
    • Duplex Stainless Steel
  • Customized valve sizes and pressure classes
  • Customized pipeline connection standards:
    • API
    • ANSI
    • ASME
    • DIN
    • EN Standards
  • Customized underground installation solutions:
    • Extended Stem Design
    • Buried Gear Operator
    • Protective Stem Casing
    • Underground Valve Box Compatibility
  • Customized sealing solutions:
    • PTFE
    • RPTFE
    • PEEK
    • Metal Seat
    • Graphite
  • Customized anti-corrosion protection:
    • FBE Coating
    • Epoxy Coating
    • 3PE Coating
    • Special Anti-Corrosion Treatment
  • Customized operation methods:
    • Manual Gear Operation
    • Pneumatic Actuator
    • Electric Actuator
    • Hydraulic Actuator
  • Customized logo marking, nameplate, packaging, and product identification
  • Customized inspection and testing according to project requirements
  • Prototype development and mass production support

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.

Natural Gas Industry

  • Underground gas transmission pipelines
  • City gas distribution networks
  • Gas storage facilities
  • Gas pressure regulation stations
  • Urban gas infrastructure projects

Oil & Gas Industry

  • Crude oil transportation pipelines
  • Petroleum product pipelines
  • Oil storage terminal systems
  • Long-distance pipeline networks

Water Supply Industry

  • Municipal water pipelines
  • Long-distance water transmission projects
  • Underground water distribution systems
  • Large-scale pumping networks

Heating & Energy Industry

  • District heating pipelines
  • Thermal energy transportation systems
  • Underground energy networks

Petrochemical Industry

  • Chemical transportation pipelines
  • Refinery connection systems
  • Industrial fluid transmission networks

Mining Industry

  • Underground slurry pipelines
  • Mine water transportation systems
  • Heavy-duty pipeline applications

Infrastructure Projects

  • Urban underground pipeline networks
  • Industrial parks
  • Large-scale pipeline construction projects
  • Critical utility systems

Product Advantages

✔ 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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