Full Bore Trunnion Ball Valve for Gas Transmission

Product Description

Our Trunnion Ball Valve is a high-performance industrial flow control valve engineered specifically for high-pressure, large-diameter pipeline applications. Manufactured to API 6D and API 608 design standards, and tested to API 598 inspection requirements, this stainless steel trunnion ball valve features a unique trunnion-mounted ball design, with upper and lower stem bearings that drastically reduce operating torque, even in extreme high-pressure conditions. Available in sizes from 6” to 24”, with pressure ratings of 150LB to 2500LB and an operating temperature range of -196℃ to 450℃, it is compatible with water, oil, gas, and steam, as well as corrosive and cryogenic mediums. Constructed with high-grade carbon steel and stainless steel materials, it is the ideal flow control solution for long-distance pipeline operators, oil and gas companies, chemical processing plants, and water treatment facilities requiring robust, long-lasting performance in harsh working environments.

Key Features & Industry-Leading Benefits

Low-Torque Operation for High-Pressure, Large-Diameter Systems

Unlike floating ball valves, the ball in our high pressure trunnion ball valve is fixed to upper and lower trunnions, which absorb all fluid pressure forces and prevent the ball from shifting toward the valve seat. This design eliminates excessive seat stress, reduces operating torque drastically, and enables effortless manual or automated operation, even in high-pressure, large-bore pipelines, reducing operator strain and actuation equipment costs.

Bi-Directional Sealing with Fire-Safe Design

This API 6D compliant trunnion ball valve features an advanced spring-preloaded valve seat assembly with self-tightening upstream sealing, with two independent seats that deliver reliable bi-directional sealing. This eliminates flow direction restrictions during installation, offering unmatched flexibility for pipeline design. It also includes a full fire-safe structure, which forms a metal-to-metal seal via spring force if the soft sealing ring is damaged by fire, meeting API 6FA and API 607 fire safety standards.

Automatic Pressure Relief & Full Port Design

The valve is equipped with an automatic cavity pressure relief function, which retracts the valve seat to release excess pressure when cavity pressure rises abnormally, then resets automatically to protect against catastrophic overpressure failure. Its full port design delivers a flow coefficient equal to straight pipe, minimizing flow resistance and pressure loss to maximize fluid transportation efficiency and reduce pumping energy costs for long-distance pipeline systems.

Trunnion Ball Valves are the ideal choice for applications requiring precise flow control, pressure tolerance, and the ability to handle harsh and high-temperature environments.

DIMENSIONS:(mm)

Industrial Applications

Our fire-safe trunnion ball valve is deployed across the most demanding industrial and pipeline applications worldwide. It is a critical component in long-distance oil and gas transmission pipelines, where it delivers reliable shutoff and flow control for crude oil, natural gas, and refined products. It is widely used in chemical processing plants to control the flow of corrosive, toxic, and high-temperature mediums, with bi-directional sealing supporting flexible process design. It also plays a vital role in municipal gas distribution networks, water treatment facilities, power generation plants, and cryogenic processing systems, delivering consistent performance in extreme temperature and pressure conditions.

Trunnion ball valve

1) Design Standard: API 60D,API608,DIN3357,GB/T12237

2) End Flange: ASME B16.5.JIS B2212.DIN 2543,GB9113

3) Size: 6"-24"

4) Pressure: 150lb~2500lb

5) Temperature: -196℃~450℃

6) Materials: Carbon steel,Stainless steel

7) Suitable Medium: Water,Oil,Gas,Steam

FAQ About Trunnion Ball Valve

What international manufacturing standards does this trunnion ball valve meet?

Our trunnion ball valve is designed and manufactured in full compliance with API 6D, API 608, and DIN 3357 international standards, with every unit inspected and tested per API 598 protocols to ensure consistent quality and performance.

Does this trunnion ball valve include automatic pressure relief functionality?

Yes. The valve features an advanced spring-preloaded valve seat design, with built-in automatic cavity pressure relief to protect against abnormal overpressure. It also includes a full fire-safe structure for enhanced safety in emergency scenarios.

Can this trunnion ball valve be installed with any flow direction?

Yes. The valve’s dual independent seat design delivers reliable bi-directional sealing, meaning it can be installed without flow direction restrictions, making it ideal for pipeline systems that require bi-directional fluid control.