Shoulong Valve
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Ensures stable sealing, reduced operating torque, and long service life in Class 300 gas pipelines.
Provides secure isolation and controlled cavity pressure relief for safer gas transmission.
Fire-safe seat design, anti-static device, and anti-blowout stem reduce risks in flammable gas applications.
Multiple materials, end connections, and actuation options to meet different gas pipeline requirements.
What is a trunnion-mounted ball valve and why is it preferred for Class 300 gas pipelines?
A trunnion-mounted ball valve features a ball that is mechanically anchored at both the top and bottom by trunnions, keeping it fixed in position under high pressure. This design significantly reduces operating torque, ensures stable and consistent sealing performance, and extends service life — making it the preferred choice for demanding Class 300 gas pipeline applications.
What does Double Block-and-Bleed (DBB) mean in a ball valve?
Double Block-and-Bleed (DBB) refers to a valve configuration that provides two independent seating surfaces that seal against pressure from both sides of the valve simultaneously, while also allowing the cavity between the two seats to be vented or bled off. This provides a higher level of isolation and pressure relief control, which is critical for safe gas transmission systems.
What safety features are included to protect against fire and gas leaks?
The valve incorporates a fire-safe seat design that maintains a metal-to-metal seal even if soft seat materials are damaged by heat or fire. An anti-static device ensures electrical continuity to prevent static charge buildup that could ignite flammable gases. Additionally, the anti-blowout stem design prevents the stem from being ejected under pressure, further enhancing overall safety in flammable gas service environments.
What configuration options are available for this ball valve?
The valve offers a wide range of flexible configuration options to suit diverse gas pipeline requirements. These include multiple body and seat material choices, various end connection types such as flanged, butt-weld, or threaded, as well as different actuation options including manual handwheel, gear operator, pneumatic actuator, or electric actuator — allowing the valve to be precisely tailored to specific operational needs.
Is this ball valve suitable for both onshore and offshore gas pipeline applications?
Yes. Thanks to its forged construction, robust trunnion-mounted design, fire-safe certification, and flexible material options, this ball valve is engineered to perform reliably in both onshore and offshore gas pipeline environments, including those subject to corrosive conditions or extreme temperature variations.
What industry standards does this Class 300 trunnion ball valve comply with?
This trunnion-mounted ball valve is designed and manufactured in compliance with internationally recognized standards including API 6D for pipeline valves, ASME B16.34 for pressure-temperature ratings, and fire-safe testing standards such as API 607 or ISO 10497. Specific certifications may vary depending on the configuration selected.
