Choosing the right ball valve is essential for the performance and reliability of your system. In this guide, we’ll compare two of the most popular types: floating ball valves and trunnion mounted ball valves. We’ll discuss their differences, advantages, and help you choose the right one for your application.
A floating ball valve features a ball that “floats” between the two seats in the valve body. The ball is not fixed but relies on the pressure of the medium to press against the seats and create a seal. This design is typically used for low to medium pressure applications.
Key Features:
The ball floats and moves to seal against the seats
Best for low to medium pressure applications
Simple and cost-effective design
In a trunnion mounted ball valve, the ball is fixed to the valve body by trunnions, or support shafts, which help support the ball’s weight. This design is ideal for high-pressure and large-diameter applications because it reduces the torque required to operate the valve and provides a more stable sealing system.
Key Features:
The ball is mounted on trunnions for support
Suitable for high-pressure and large-diameter applications
Requires less torque to operate
| Feature | Floating Ball Valve | Trunnion Mounted Ball Valve |
|---|---|---|
| Ball Support | The ball “floats” between the seats | The ball is fixed with trunnions |
| Pressure Rating | Typically used for low to medium pressure | Ideal for high-pressure systems |
| Torque Requirement | Higher torque required to operate | Lower torque required due to trunnions |
| Applications | General applications and pipelines | Heavy-duty applications, high pressure |
| Cost | More cost-effective | Higher cost due to design complexity |
Cost-Effective: The floating ball valve is simpler in design, making it less expensive to manufacture and install.
Compact Design: Suitable for smaller applications where space and weight are concerns.
Easier to Maintain: Due to its simple construction, it is easier and more affordable to maintain.
Better for High Pressure: Trunnion mounted valves are designed to withstand higher pressure and larger flow rates.
Reduced Torque: The ball is supported by trunnions, making it easier to operate with less torque.
Longer Service Life: Trunnion mounted ball valves tend to have a longer service life, especially in high-pressure environments.
When deciding between a floating ball valve and a trunnion mounted ball valve, consider the following factors:
Pressure and Flow Rate: If your system operates under high pressure, a trunnion mounted ball valve is the better choice. For low to medium pressure applications, a floating ball valve will suffice.
Size of the System: Trunnion mounted valves are ideal for larger systems with bigger diameters.
Torque Requirements: Trunnion mounted valves require less torque, making them more suitable for large systems or those with higher flow rates.
Pipeline systems with low to medium pressure
Gas, water, and oil transportation
Industrial processes with smaller fluid flow rates
High-pressure pipelines in the oil and gas industry
Large-scale industrial applications with high flow rates
Power plants and water treatment plants
Floating Ball Valves: Regularly inspect the seats for wear and tear. Lubricate the valve stems to ensure smooth operation.
Trunnion Mounted Ball Valves: Keep the trunnions and seats clean, check for corrosion, and replace seals as needed to maintain the valve’s performance.
Q: What is the main advantage of a trunnion mounted ball valve?
A: Trunnion mounted ball valves are ideal for high-pressure and large-diameter applications as they require less torque to operate and offer more stable sealing.
Q: Are floating ball valves suitable for high-pressure applications?
A: Floating ball valves are typically used for low to medium pressure applications. For high-pressure systems, a trunnion mounted valve is recommended.
Q: How do I choose between floating and trunnion ball valves?
A: Consider your system’s pressure, size, and torque requirements. Floating ball valves are best for smaller, lower-pressure systems, while trunnion mounted valves are ideal for high-pressure, large-diameter systems.
Floating ball valves are cost-effective and simple, making them ideal for low to medium pressure systems. Trunnion mounted ball valves, on the other hand, are better suited for high-pressure applications with larger flow rates. FULL-THINK offers both types of ball valves with high-quality standards to meet your needs. Contact us today for expert advice and reliable valve solutions!