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China Large Diameter Fully Welded Ball Valve for Natural Gas Transmission Pipeline Manufacturers, Factory
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China Large Diameter Fully Welded Ball Valve for Natural Gas Transmission Pipeline Manufacturers, Factory
√ Engineered for Critical Natural Gas Transmission Infrastructure √ Monoblock Fully Welded Body — Zero External Leakage Underground √ Heavy-Duty Trunnion Design for High-Pressure Pipeline Stability √ Extra-Large Diameter Capability up to DN1200 and Beyond √ Low-Temperature Impact Tested Steel for Cold Climate Pipelines √ Project-Level Manufacturing Strength with Custom Engineering Support
Eliminates external leakage paths and enhances long-term sealing integrity for critical gas transmission pipelines.
Heavy-Duty Trunnion Mounted Design
Ensures pressure-balanced sealing stability and reliable shut-off performance in large diameter pipeline applications.
Engineered for Extra-Large Diameters
Structural reinforcement and optimized internal design maintain rigidity and alignment in oversized valve configurations up to DN1200 and beyond.
Pipeline-Grade Double Block & Bleed
Provides secure isolation, cavity pressure relief, and verification capability for safe gas transmission operations.
Fire-Safe & Anti-Static Protection
Designed to meet emergency sealing requirements and ensure operational safety in hazardous gas environments.
Long-Term Infrastructure Service
Advanced welding procedures, NDE inspection, and full testing ensure durability and reduced maintenance.
Product Description
The Large Diameter Fully Welded Trunnion Ball Valve is a high-performance pipeline ball valve designed for natural gas transmission and major energy infrastructure projects. Built with a monoblock fully welded body, it delivers exceptional sealing integrity and long-term operational reliability in demanding pipeline environments.
Featuring a heavy-duty trunnion mounted design, this large diameter ball valve ensures stable, pressure-balanced shut-off performance while minimizing operating torque in oversized applications. It is ideally suited for gear-operated or motorized systems used in critical gas transmission networks.
Manufactured from low-temperature carbon steel such as ASTM A350 LF2 and verified through impact testing and comprehensive inspection, each valve guarantees mechanical strength and durability in cold climate conditions. Available in sizes up to DN1200 and beyond, these valves provide customized fully welded pipeline solutions engineered for extended service life, reduced maintenance, and infrastructure-grade reliability.
Frequently Asked Questions
What are the advantages of a monoblock fully welded body?
The monoblock fully welded construction eliminates potential external leakage paths through body joints, ensuring maximum sealing integrity and structural strength for high-pressure gas transmission.
What is the maximum size available for these valves?
These valves are specifically engineered for extra-large diameters, with standard availability up to DN1200, and customized solutions available for even larger pipeline requirements.
Can these valves operate in extremely cold environments?
Yes, they are manufactured using low-temperature carbon steel like ASTM A350 LF2 and undergo rigorous impact testing to ensure reliable performance in cold climate conditions.
Do the valves support Double Block and Bleed (DBB) functionality?
Absolutely. The design provides secure isolation with a double block and bleed function, allowing for cavity pressure relief and sealing verification during operation.
Are these valves fire-safe?
Yes, the valves include fire-safe and anti-static protection features, designed to maintain emergency sealing and operational safety in hazardous environments.
What type of actuators can be used with these valves?
Due to the optimized trunnion mounted design which reduces operating torque, these valves are perfectly suited for manual gear operators, electric motors, or pneumatic actuation systems.
Shoulong Valve
