How Do Floating Ball Valves Work? [Floating vs. Trunnion ...
In the world of valves, ball valves are renowned for their compact, robust design, as well as their reliable and quick on/off control capabilities. These valves function by employing a ball that has a hole (referred to as a port) drilled through its center to regulate the flow of media. The ball is rotated 90 degrees to align the port with the valve body, permitting media to pass through the valve. To shut off the flow, the ball is simply rotated back 90 degrees to the closed position. Every ball valve is designed with two seats, typically made from polytetrafluoroethylene (PTFE), which help secure the ball and create a tight seal that prevents leaks through the valve.
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Types of Ball Valves
Floating and trunnion are the two primary designs of ball valves. Floating ball valves are widely utilized in industrial piping systems due to their effective design. These valves are crafted to ensure that as the seats wear down, the pressure from the flowing media forces the ball against the downstream seat, thereby maintaining a secure seal.
Floating Ball Valve Design
Conversely, in trunnion ball valves, the ball is anchored in position by bearings that prevent it from shifting downstream. A spring-loaded seat mechanism guarantees that the valve remains leak-tight, even as the seat begins to wear over time.
In this post, we’ll delve deeper into the details of floating ball valve design and its specific applications, which will elucidate the circumstances under which you might prefer a trunnion-mounted valve over a floating one.
Understanding the Variations of Ball Valves
By Carson Hu
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October 24,
Currently, there are more than 3,000 facilities on the Outer Continental Shelf that are engaged in the collection and treatment of oil and gas. This extraction process relies on specific types of high-pressure valves, with ball valves often being the preferred option. These valves, which may also be referred to as pig ball valves, are essential in the context of pipeline pigging systems. It’s crucial to understand the differences between these valve types before sourcing and investing in them. Let’s explore the critical characteristics of various ball valve designs.
Ball Valve Body Configurations
Before discussing the precise types of ball valves available today, we should recognize that there are four main body styles: single body, split body, top entry, and welded styles. The various styles of ball valves result in a wide array of potential applications, allowing for greater versatility in their use.
Full Port Ball Valves
First, we can consider the full port ball valve, which is characterized by its oversized ball—matching the pipeline size. This design minimizes friction and allows for unrestricted media flow, resulting in a larger valve size as well.
Standard Port Valves
Standard port valves are more common and typically less expensive. They feature a smaller ball, leading to a smaller valve size and a more restricted media flow that's generally one pipe size smaller than the valve's size.
V Port Ball Valves
The V port ball valve gets its name from its unique V-shaped seat, allowing for easier adjustment of the flow direction. While useful, this design necessitates a secure application site for safety.
Trunnion Ball Valve
Finally, trunnion ball valves utilize a particular mechanism to anchor the valve at both the top and bottom, making them suitable for larger and higher pressure applications. Although not suitable for every project, they excel in high-pressure environments.
With an understanding of the various styles and types of ball valves, you’ll be better positioned to make informed choices that align with your operational needs. For more information, please contact us today. We are the world’s leading China 3 Way Ball Valve Manufacturer and your one-stop shop for all valve solutions. Our specialized staff is ready to assist you in finding the right product for your requirements.
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