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What is the leakage rate of a floating ball valve?

Dec 22, 2025

Grace Ng
Grace Ng
I am a product testing specialist at NEWLOTOKE, where I conduct rigorous tests on our valves to ensure they meet API standards. My role is crucial in maintaining the quality and performance of our products.

Hey there! As a supplier of floating ball valves, I often get asked about the leakage rate of these valves. It's a crucial topic, especially for those in industries where fluid control is a big deal. So, let's dive right in and talk about what the leakage rate of a floating ball valve really means.

First off, what's a floating ball valve? Well, it's a type of valve that uses a ball to control the flow of fluid. The ball is "floating," which means it's not fixed in place. When the valve is open, the ball rotates to allow fluid to pass through. When it's closed, the ball blocks the flow. Simple, right?

Now, the leakage rate. This is basically the amount of fluid that manages to pass through the valve when it's supposed to be closed. It's measured in different ways, but a common unit is the number of drops per minute or the volume of fluid per unit of time.

There are a few factors that can affect the leakage rate of a floating ball valve. One of the biggest is the quality of the valve's seat. The seat is what the ball seals against when the valve is closed. If the seat is damaged, worn out, or not properly installed, it can lead to a higher leakage rate.

Another factor is the pressure of the fluid. Higher pressures can put more stress on the valve and its components, increasing the likelihood of leakage. The type of fluid also matters. Some fluids are more corrosive or viscous than others, which can affect the performance of the valve and its sealing ability.

The temperature of the fluid is also important. Extreme temperatures can cause the materials of the valve to expand or contract, which can affect the seal between the ball and the seat. For example, if the temperature is too high, the plastic or rubber components of the valve might soften, leading to a less effective seal.

Now, let's talk about the different types of floating ball valves and how their leakage rates might vary. We have the Floating Soft Seat Ball Valve. These valves typically have a soft seat made of materials like PTFE (polytetrafluoroethylene) or NBR (nitrile butadiene rubber). Soft seats can provide a good seal, especially at lower pressures. They're also great for applications where a tight shut-off is required. However, they might not be as durable as metal seats, especially in high-pressure or high-temperature environments.

 (5)Floating Metal Seat Ball Valve

On the other hand, we have the Floating Metal Seat Ball Valve. These valves have a seat made of metal, which makes them more resistant to wear, corrosion, and high temperatures. They can handle higher pressures and are often used in more demanding applications. However, the leakage rate of metal seat ball valves might be slightly higher compared to soft seat ball valves, especially at lower pressures.

So, how do we measure the leakage rate of a floating ball valve? Well, there are standard tests and procedures that are used in the industry. One common test is the bubble test. In this test, the valve is closed, and a gas is applied to one side of the valve. The other side is then checked for the presence of bubbles, which indicates leakage. The number of bubbles per minute can be counted to determine the leakage rate.

Another test is the volumetric test. In this test, the valve is closed, and a known volume of fluid is applied to one side of the valve. The amount of fluid that passes through the valve over a certain period of time is measured to determine the leakage rate.

As a supplier, we take the leakage rate of our floating ball valves very seriously. We use high-quality materials and advanced manufacturing processes to ensure that our valves have a low leakage rate. We also perform rigorous testing on each valve before it leaves our factory to make sure it meets the industry standards.

If you're in the market for a floating ball valve, it's important to consider the leakage rate. You need to think about the specific requirements of your application, such as the pressure, temperature, and type of fluid. If you need a valve with a very low leakage rate, a soft seat ball valve might be a good choice. But if you're dealing with high pressures or high temperatures, a metal seat ball valve might be more suitable.

At the end of the day, choosing the right floating ball valve can make a big difference in the efficiency and reliability of your fluid control system. If you have any questions or need help choosing the right valve for your application, don't hesitate to reach out. We're here to help you find the best solution for your needs. Whether you're in the oil and gas industry, chemical processing, or any other field that requires fluid control, we've got you covered.

So, if you're interested in purchasing floating ball valves or want to learn more about our products, feel free to contact us. We're always happy to have a chat and discuss your requirements. We can provide you with detailed information about our valves, including their leakage rates, performance, and pricing. Let's work together to find the perfect floating ball valve for your project.

References

  • Valve Handbook by Valve Manufacturers Association
  • Standards and Testing Procedures for Industrial Valves by International Organization for Standardization

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