Trunnion Ball Valve: Precision and Reliability Combined

Your Best Trunnion Ball Valve Manufacturer In China

In terms of ball valve design, floating ball valves allow the ball to move slightly downstream to create a seal on one side, making them suitable for moderate-pressure uses. Our trunnion design ball valve secures the ball with a ball valve trunnion, making it ideal for high pressure applications due to improved sealing and lower torque requirements.

Manufactured in China by a reputable manufacturer-YINKE, its bolted body—which is further reinforced by precision welds and a forged structure—and full-port design deliver steady performance across various pressure classes and metering setups, whether installed at the flange end or via end connections.

Its design and construction have been carefully refined to meet stringent requirements, all while providing a peek into the future of valve technology and maintaining ease of integration into existing systems.

The trunnion design allows for low torque operation and consistent sealing, making it ideal for high pressure applications where the valve remains secured in place and efficient even when handling larger valves.

The valve features spring-loaded seats, double block elements, and double seals that ensure effective sealing and isolation. The trunnion design creates a reliable seal and leads to fewer operational issues, enhancing operational efficiency and safety.

A quarter-turn design and integrated pig traps for larger valves help reduce wear on the shaft, stem, and body.

The valve can act via manual, electric, or pneumatic mechanisms, allowing for efficient process management and safety. The secure closed position and reliable electrical continuity are achieved through reinforced metal components, nylon elastomers, and robust flanges—each piece is crafted with care, utilizing weld and forge techniques to maximize durability.

A variety of materials are used to enhance durability, high-performance capabilities, and compliance with industry standards.

Engineers have calibrated each detail to withstand variable conditions and ensure long-term durability, while quality testing confirms impact resistance and performance stability.

The upper bearing plate secures the ball in place and prevents axial movement, which is critical for maintaining proper function in high pressure applications.

Together, these features create a resilient system that supports proper port compression and venting for steady fluid control. Anti-static devices are included to prevent sparks and ensure safety in the line.

What is a Trunnion Ball Valve?

A trunnion ball valve is a specialized type of ball valve designed for high-pressure and large-diameter applications. Unlike floating ball valves, the ball in a trunnion ball valve is anchored at both ends by trunnions—support shafts that absorb the pressure load and keep the ball securely in place. This design ensures stable operation, precise control, and reliable sealing, even under extreme pressure conditions. Trunnion ball valves are widely used in industries such as oil and gas, petrochemicals, and power generation, where safety and performance are paramount.

Advantages of Trunnion Ball Valves

Superior Sealing Performance: The trunnion design, combined with spring-loaded seats, ensures tight and consistent sealing, minimizing leakage even at high pressures. Reduced Operating Torque: The anchored ball reduces friction and torque requirements, making the valve easier to operate, especially in automated systems. Enhanced Durability: Trunnion ball valves are built to withstand harsh environments and high-cycle operations, offering long service life and reduced maintenance needs. Versatility: Suitable for a wide range of fluids, including corrosive and abrasive media, thanks to robust materials and advanced sealing technologies. Safety: The secure anchoring of the ball enhances operational safety, particularly in critical applications such as natural gas transportation and high-pressure pipelines.

Design Features of Trunnion Ball Valves

Trunnion ball valves are manufactured to meet stringent international standards, ensuring quality, safety, and compatibility. Common standards include: API 6D / API 608: Specifications for pipeline and industrial ball valves. ASME B16.34: Standards for valve pressure-temperature ratings and materials. ISO 17292: International standards for metal ball valves. Fire-Safe Certification: Compliance with API 607 or ISO 10497 for fire safety. Pressure Ratings: Typically available in ANSI Class 150 to 250 or higher, depending on application requirements. Material Options: Carbon steel, stainless steel, duplex, and other alloys to suit various fluids and environments.

Types of Trunnion Ball Valves

Two-Piece Trunnion Ball Valve: Consists of two main body pieces bolted together, allowing for easier maintenance and reduced leakage paths. Three-Piece Trunnion Ball Valve: Features a central body section and two end caps, providing maximum accessibility for cleaning, inspection, and repair without removing the valve from the pipeline. Fully Welded Trunnion Ball Valve: Designed for buried or subsea applications, offering superior leak protection and minimal maintenance. Top-Entry Trunnion Ball Valve: Allows for maintenance and inspection from the top without removing the valve from the pipeline, ideal for critical service locations. Each type is engineered to address specific operational needs, ensuring optimal performance, safety, and reliability across a wide range of industrial applications.

Design and Configuration

Trunnion mounted ball valves stand out in the world of ball valve design thanks to their robust trunnion configuration, which provides exceptional stability and control in demanding environments.

Unlike floating ball valves, the trunnion mounted ball valve features a shaft—known as the trunnion—that anchors the ball at both the top and bottom.

This support system minimizes ball movement under pressure, resulting in lower operating torque and smoother quarter turn operation, even in high pressure applications where the valve remains securely fastened.

A hallmark of the trunnion design is its use of spring-loaded seats. These seats maintain consistent contact with the ball, ensuring reliable sealing performance across a wide range of pressure classes.

The double block and bleed capability is another critical design feature, allowing operators to isolate sections of the pipeline and safely vent trapped pressure.

This is especially valuable in natural gas and oil service, where safety and leak prevention are paramount.

The trunnion mounted ball valve’s bolted body construction and flange end connections create a secure, leak-tight seal that withstands the rigors of upstream and midstream operations.

Electrical continuity is built into the design, reducing the risk of sparks and enhancing safety in hazardous environments.

Double seals further reinforce the valve’s ability to maintain a tight closed position, even under fluctuating flow and pressure conditions.

Manufactured in accordance with API 6D and other industry standards, trunnion mounted ball valves are available in an extensive range of sizes, materials, and end connections.

Options include metal and elastomer seats, full port configurations for unrestricted flow, and specialized designs for pig traps and metering stations.

The upper and lower bearings of the trunnion ball provide additional support, allowing the valve to handle high flow rates and pressure without compromising performance.

Take a peek at the quality and precision that goes into every joint—each piece is meticulously welded and often forged to deliver long-term reliability.

Maintenance is simplified by the modular trunnion design, which allows for straightforward disassembly and reassembly.

The stem and body are engineered to resist wear and deformation, while the port and flanges are precision-machined for secure, reliable connections.

Whether used for isolation, block, or vent applications, these valves deliver consistent, safe, and efficient operation.

In summary, the design and configuration of trunnion mounted ball valves make them the ideal choice for high pressure, safety-critical applications in the oil, gas, and process industries.

Their advanced trunnion design, spring-loaded seats, and double block and bleed functionality ensure reliable sealing, easy maintenance, and long-term durability—meeting the needs of modern industrial operations.

Diverse Applications

Available in a range of sizes and dimensions, the valve meets diverse pressure classes and end connection requirements, offering both flush and pig trap configurations. Advanced design features such as fire-safe testing, electrical continuity, and high-performance materials enhance safety and performance in demanding high-pressure and high-temperature applications.

ISO-standard seats improve bleed system reliability and minimize leakage.

A carefully engineered stem and strong compression system allow the valve to perform steadily even under high pressure and in fire-prone zones.

The design, enhanced by integrated spring-loaded seats and reliable electrical continuity, has been rigorously tested to excel in metering stations and upstream natural gas pipelines.

Its modular construction and attention to installation simplicity further reduce potential issues and streamline maintenance procedures. Whether you’re installing larger valves or working with smaller, more intricate pieces, the valve remains secured, ensuring flawless operation.

Integrate this high-quality trunnion mounted ball valve into your operations to improve overall performance and reduce leaks.

Its bolted body, quarter turn valve design with a quarter-turn mechanism, and advanced double seals work together to deliver full port fluid control while reliably isolating the system. The valve design ensures efficient and stable flow regulation, minimizing pressure drops and maintaining consistent flow even under high-pressure conditions.

Regular performance assessments and extensive field testing support its consistent operation, ensuring a dependable upgrade for setups that use flange connections or other configurations.

High-Pressure Performance

Trunnion ball valves are engineered to excel in high pressure applications, making them a trusted solution for industries where safety and reliability are paramount. The trunnion design provides additional support to the ball, allowing it to withstand significant pressure without compromising the integrity of the seal.