How to Choose: Ball Valve Trunnion vs Floating

Choosing the right type of ball valve for your specific application can significantly impact operational efficiency, maintenance, and overall costs. Two prominent types of ball valves are trunnion-mounted and floating ball valves. This article aims to help you understand the differences between these two types and guide you in making an informed decision.

Understanding the Basics of Ball Valves

Ball valves are quarter-turn valves that use a spherical disc to control flow. They are prized for their durability and reliability, making them widely used in various industries, including oil and gas, water treatment, and HVAC.

Trunnion-Mounted Ball Valves

Trunnion-mounted ball valves are designed with a fixed ball that is supported by trunnions (pivot points) on either side. These valves are typically used in larger diameter applications and offer several advantages.

Advantages of Trunnion-Mounted Ball Valves

• Low Operating Torque: The trunnion design allows for lower operating torque, which reduces wear on the actuator, making these valves ideal for high-pressure applications.
• Enhanced Stability: The fixed position of the ball provides increased stability, making them suitable for high-pressure and high-temperature conditions.
• Long Lifespan: Trunnion-mounted valves often have a longer lifespan due to their construction, which minimizes wear on sealing surfaces.

Applications of Trunnion-Mounted Ball Valves

These valves are commonly used in applications that require large flow capacities, such as:

• Oil and natural gas extraction and processing
• Pipeline systems
• Power plants

Floating Ball Valves

Floating ball valves, in contrast, feature a ball that "floats" within the valve body. The ball is not fixed in place and is pushed against the seat by the pressure of the fluid, which helps achieve a solid seal.

Advantages of Floating Ball Valves

• Simplicity and Cost-Effectiveness: Floating ball valves are usually simpler in design and less expensive to manufacture, making them a cost-effective alternative for smaller applications.
• Good for Smaller Pipelines: These valves perform well in smaller pipeline systems and can handle moderate pressure and temperature ranges effectively.
• Easy Maintenance: The straightforward design allows for easier maintenance and repair, reducing downtime.

Applications of Floating Ball Valves

Floating ball valves are ideal for applications such as:

• Water treatment facilities
• Chemical processing
• HVAC systems

Key Differences Between Trunnion and Floating Ball Valves

Conclusion

When selecting between trunnion-mounted and floating ball valves, consider the specifics of your application, including pressure, temperature, and flow rate requirements. Trunnion valves are better suited for large, high-pressure systems, while floating ball valves are ideal for smaller, less demanding applications. By understanding these differences, you can make a more informed choice tailored to your operational needs.

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