API 6D Split Body Floating and Trunnion Ball Valves

In industrial flow control systems, API 6D Split Body Floating and Trunnion Ball Valves are pivotal for ensuring reliability, safety, and operational efficiency. Designed to adhere to the stringent requirements of the API 6D standard, these valves are integral to pipeline systems in the oil, gas, and other critical industries. This article explores the design principles, operational mechanisms, key advantages, and diverse applications of these high-performance valves while optimizing the content for technical clarity and relevance.

What is an API 6D Split Body Ball Valve?

API 6D Split Body Ball Valves are designed to regulate fluid flow in pipelines using a spherical closure mechanism known as the ball. The term “split body” signifies the multi-part construction of the valve body, enabling ease of maintenance and assembly.

Floating Ball Valve

A Floating Ball Valve features a ball that is not fixed to the stem but “floats” within the valve body. When fluid pressure is applied, the ball is pushed against the downstream seat, creating a secure seal.

• Applications: Suitable for low to medium-pressure systems such as water distribution, natural gas pipelines, and various process industries.
• Benefits: Compact design, cost-effectiveness, and straightforward operation.

Trunnion Ball Valve

Conversely, a Trunnion Ball Valve incorporates a ball supported by trunnions at the top and bottom, reducing seat stress and ensuring reliable operation in high-pressure environments.

• Applications: Preferred for high-pressure pipelines, large-diameter systems, and critical operations in oil and gas facilities.
• Benefits: Reduced operating torque and extended durability under extreme conditions.

Key Technical Specifications

API 6D Split Body Ball Valves are meticulously engineered to meet diverse industrial requirements, with specifications including:

These valves include features like Double Block and Bleed (DBB) capability, fire-safe designs, and anti-blowout stem construction to ensure safety and efficiency.

Advantages of API 6D Split Body Floating and Trunnion Ball Valves

1. Split Body Design:
   • Simplifies maintenance and part replacement.
   • Supports varied material configurations for enhanced durability.
2. Floating Ball Valves:
   • Cost-efficient for moderate-pressure systems.
   • Self-sealing capability improves fluid control reliability.
3. Trunnion Ball Valves:
   • Ideal for high-pressure applications due to low torque requirements.
   • Provides secure sealing in large-diameter pipelines.
4. Fire-Safe Features:
   • Complies with API 6FA and ISO 10497 standards to prevent leaks during fire incidents.
   • Secondary metal-to-metal seals activate in the event of soft seal failure.
5. Low Emissions:
   • Meets ISO 15848 standards, ensuring minimal fugitive emissions for environmental safety.

Applications of API 6D Ball Valves

API 6D Ball Valves are widely used across various industries, including:

• Oil and Gas: Crude oil and natural gas pipelines, offshore platforms, and refineries.
• Chemical Processing: Handling corrosive chemicals and volatile fluids safely.
• Power Generation: Steam and water lines in thermal and nuclear plants.
• Water Treatment: Flow control in large-scale treatment facilities and desalination plants.
• Food and Beverage: Hygienic designs for clean and safe processing.

Innovative Features

1. Double Block and Bleed (DBB):
   • Isolates the pipeline while allowing cavity venting for safe maintenance.
2. Anti-Blowout Stem Design:
   • Prevents stem displacement due to internal pressure, ensuring safety.
3. Fire-Safe Mechanisms:
   • Incorporates graphite seals and backup metal seats for emergency integrity.
4. Low Torque Operation:
   • Minimizes operational effort, reducing wear and costs.
5. ISO 5211 Mounting Flange:
   • Facilitates actuator integration for automated operations.

Maintenance Recommendations

To ensure longevity and optimal performance:

• Routine Inspections: Regularly check for leaks or seat wear.
• Lubrication: Use suitable lubricants to prevent corrosion and wear.
• Original Spare Parts: Employ OEM parts to maintain valve integrity.
• Testing: Perform periodic torque and pressure tests for consistent performance.

Conclusion

API 6D Split Body Floating and Trunnion Ball Valves are indispensable for critical flow control applications, offering robust design, compliance with international standards, and innovative features. By selecting the appropriate valve type and adhering to maintenance best practices, industries can enhance operational efficiency, minimize downtime, and ensure safety.

For more information or to explore these valve solutions further, consult reputable manufacturers or technical resources.

Batu Valve is one of the leading trunnion ball valve manufacturers in Turkey. All our trunnion ball valves have affordable price and low torque.

We produce trunnion ball valves up to 56" size and in the Class 150 - Class 2500 working pressure range. Connection ends can be flanged or butt welded. It can be produced from different materials according to the usage areas. Our trunnion ball valves are suitable for manual, gearbox, pneumatic actuator, hydraulic actuator and electric actuator use.

Our Technical article about the of LNG and CNG Ball Valves has been published on Valve World Magazine November 2024 Issue. Please click to read.