Metal Seated Ball Valve: Floating vs. Trunnion

Selecting the right metal seated ball valve is crucial for ensuring safe and efficient operations. Ball valves provide numerous advantages over other types of valves, such as a more compact design, excellent sealing capabilities, and straightforward operation. It is essential to determine whether a floating ball valve or a trunnion ball valve is best suited for your specific application. This article will explore the differences between the two options and the scenarios in which one may be preferred over the other.

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What are the Differences Between a Trunnion and a Floating Metal Seated Ball Valve?

Understanding the distinctions between floating and trunnion ball valves is fundamental. Essentially, these two designs feature different methods of supporting the internal ball.

In a floating ball valve, the seats secure the ball in place, allowing it to "float" freely within the valve body. When the upstream pressure from gas or liquid acts on the ball, it shifts upward to make contact with the downstream seat, forming a tight seal.

Conversely, a trunnion metal seated ball valve incorporates shafts positioned above and below the ball, effectively anchoring it and preventing lateral movement within the valve body. Instead of floating, the ball is surrounded by floating seats, which consistently contact the ball. Under pressure, these seats press against the ball, creating a reliable seal.

Generally speaking, floating ball valves require more torque to operate than their trunnion counterparts. Additionally, floating ball valves are typically restricted to smaller sizes compared to the more robust trunnion options.

When to Choose Floating vs. Trunnion for Severe Service Ball Valves?

When deciding which type of severe service ball valve to utilize for your operations, it is essential to evaluate both floating and trunnion styles. Several factors can assist you in making an informed choice.

Cost is often a significant consideration when selecting a valve. In general, floating ball valves are less expensive than trunnion ball valves due to their simpler design and manufacturing processes. They do not require spring-loaded seats or additional shafts to stabilize the ball, resulting in fewer internal components.

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However, your specific application also plays a vital role in the decision-making process. As mentioned earlier, floating ball valves may necessitate greater torque to operate, particularly as pressure and valve size increase. Consequently, for high-pressure applications, many professionals prefer trunnion style valves due to their versatility and ability to handle higher pressures more easily.

Additionally, floating ball valves are generally smaller, making them ideal for smaller pipelines. However, if you are dealing with larger pipelines, a trunnion ball valve may be necessary, as these valves can accommodate larger diameter balls than floating variants.

Dependable, Heavy-Duty Ball Valves

For high-quality ball valves tailored for severe service applications, consider Copeland Valve to meet your needs. With a history of manufacturing ball valves, we offer some of the most innovative and top-quality valves available today. Our team collaborates with you to identify effective and budget-friendly solutions for your applications. In addition to exceptional design and manufacturing, we provide fast turnaround times and competitive pricing. Whether you're seeking a forged ball valve or a custom-designed slurry valve, we are ready to assist you. Reach out to us today at (346) 384- to request a quote!

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If you want to learn more about Customized Trunnion Mounted Ball Valve, contact us today to schedule an expert consultation!