Which Is Better for Your System: Trunnion Mounted or Floating Ball Valve?

**Which Is Better for Your System: Trunnion Mounted or Floating Ball Valve?**.

In the realm of industrial applications, valves play a critical role in regulating and directing flow in piping systems. Among the various types of valves, ball valves are among the most popular for their durability, reliability, and ease of operation. Two primary designs are prevalent in the industry: trunnion mounted ball valves and floating ball valves. Understanding the distinctions between these two designs is crucial for making informed purchasing decisions that align with your operational requirements.

### Trunnion Mounted Ball Valves: An Overview.

Trunnion mounted ball valves are engineered with a ball that is fixed within the valve body, supported by trunnions (pivot points) on both the top and bottom. This design minimizes the operational stress on the valve seat during high-pressure operations, making it an ideal choice for large diameter and high-pressure applications. The trunnion mounting allows for better control and reduces the risk of seat wear over time, which can lead to leakage.

These valves are commonly utilized in critical applications such as oil and gas, petrochemical, and power generation industries, where a reliable seal and resistance to flow-induced turbulence are paramount. Additionally, trunnion mounted ball valves are often larger in size, accommodating higher flow rates with less pressure drop, which can be a significant advantage in large piping systems.

### Floating Ball Valves: A Different Approach.

In contrast, floating ball valves feature a ball that is not fixed but instead "floats" within the valve body. The ball is held in position by the compression of the valve seats. Upon closing, the ball moves slightly upward, creating a tight seal against the upstream seat. This design makes floating ball valves simple, compact, and cost-effective, making them a reliable choice for lower pressure applications.

Floating ball valves are widely used in water treatment, HVAC, and light industrial applications. Their straightforward design allows for ease of maintenance and operation, and they are generally favored in smaller sizes where high flow and pressure are not an issue. Moreover, due to their lighter design, floating ball valves are often more affordable than their trunnion-mounted counterparts.

### Purchasing Considerations: Trunnion Mounted vs. Floating Ball Valve.

When deciding between trunnion mounted and floating ball valves, several factors must be weighed to ensure the chosen option aligns with your system's requirements:

1. **Application and Pressure Ratings**: Consider the specific pressures and flow rates your application demands. For high pressure and larger diameters, trunnion mounted ball valves are often preferred due to their design and durability. Conversely, for lower pressure applications, floating ball valves may suffice.

2. **Size and Weight**: If space is limited and weight is a concern, floating ball valves may be the better option, as they are typically smaller and lighter.

3. **Maintenance and Lifespan**: If you require minimal maintenance and are operating in a demanding environment, trunnion mounted ball valves tend to have a longer lifespan due to their design that mitigates wear and tear. However, floating ball valves also have their advantages in less challenging conditions, as their simplicity allows for easier repairs.

4. **Cost Considerations**: While trunnion mounted ball valves could carry a higher upfront cost, consider the long-term savings on maintenance and replacement costs. Floating ball valves offer an attractive price point but may incur higher maintenance costs if they do not withstand the application’s conditions.

5. **Operational Conditions**: Assess the types of media that will flow through the valves. Trunnion mounted options often handle abrasive materials better, whereas floating valves are frequently preferred in applications with clean liquids or gases.

### Conclusion.

In conclusion, the decision between trunnion mounted and floating ball valves ultimately hinges on your specific operational needs. Understanding the advantages and limitations of each type will empower you to make an informed purchasing decision that optimally supports your system’s performance. As you evaluate these options, consider not only the immediate costs but also the long-term implications on maintenance, reliability, and performance in your applications. Whether it’s the robust and durable nature of trunnion mounted valves or the lightweight and economical design of floating ball valves, the right choice will depend on the unique requirements of your operation.

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