A double union ball valve is a multipurpose and reliable type of valve that is widely used in piping systems, particularly when safe disassembly and proper maintenance are essential. Knowing the difference between single union and double union ball valves will help you in selecting the right product for your operation.
This blog covers the differences of these valves as well as highlights the premium quality and design characteristics of double union ball valves from DESO, a trusted choice in the industry.
Single Union Ball Valve
A single union ball valve has one union connection, usually at the downstream end, that allows for easy valve removal and maintenance without cutting the pipeline completely. On the other end, the valve body remains firmly attached to the pipeline, reducing the possibility of full valve dismantling.
This type is usually well-suited for low-demand systems where maintenance frequency is lower. However, single union ball valves often have limitations, like limited angular misalignment tolerance and longer maintenance times because of partial pipe disruption.
Double Union Ball Valve
A double union ball valve incorporates union connections at both ends of the valve body. This design allows total removal of the valve from the piping system without disrupting nearby pipes.
This total union setup provides greater ease of maintenance as it allows quick repairs or replacements while reducing downtime. Additionally, its design ensures unobstructed flow and secured sealing, allowing reduced pressure drop and leak risks.
These valves are commonly used in demanding commercial and industrial systems that need regular servicing. They are available in different sizes, including the commonly used 2 inch double union ball valve, and are incorporated into high-quality products such as PPR double union ball valves that are widely applied in plumbing.
Main Differences
| Features | Single Union Ball Valve | Double Union Ball Valve |
| Union connections | One end only | Both ends have a union |
| Maintenance | Partial valve removal and pipeline disturbance | Total valve removal and no pipeline disturbance |
| Maintenance Time | Slower and requires pipeline emptying | Faster and easy valve swapping |
| Angular Misalignment Tolerance | ±2° | ±5° (more flexible) |
| Application | Simpler, low-maintenance systems | Industrial, high-maintenance systems |
| Cost | Generally budget-friendly initial cost | Higher initial cost but better serviceability |
Why choose the DESO Double Union Ball Valve?
DESO is a trusted choice when it comes to double union ball valves due to several reasons:
- High Pressure Rating: DESO double union end ball valves meet the PN20 pressure rating (up to 2.5 MPa), well-suited for industrial applications and higher pressure environments.
- Various Structural Options: DESO provides two different double union end ball valve designs. This helps adapt to a wide range of market needs and cost considerations, making it more convenient to select a valve that completely balances budget and performance.
- Quality Control: Every DESO valve goes through extensive testing, including hydrostatic testing, to ensure durability and reliability. Such thorough quality control ensures leak-tight and long-lasting performances.
Conclusion
The double union ball valve is an outstanding choice for applications that require maintenance ease, high-pressure handling, and system flexibility. Available in different sizes and materials to adhere to multiple applications internationally, including reliable options from china double union ball valve manufacturers, DESO delivers dependable performance in harsh settings.
With products like the 2 inch and PPR double union ball valve, DESO is an excellent investment for both industrial and residential piping solutions. For trusted valve solutions, DESO leads the way.
