Why Choose Triple Offset Valve Over Ball Valves?
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It&#;s important to pick the ideal device for your chemical or power plant, and the type required depends on its application. Triple offset butterfly valves are often considered the highest standard for virtually any application because they are durable, long-lasting and require minimum maintenance. However, when you&#;re trying to cut overhead costs while putting a processing plant together, it&#;s tempting to consider using a ball valve. In this post, we&#;ll look at why a triple offset valve is still a more cost-effective, safe and efficient choice for your processing application.
While triple offset valves have a disk that stops the flow of liquid, the ball valve has a spherical closure system. It opens and closes by rotating the ball 90 degrees, and it can also be used to reduce or increase the flow. When used to modify the amount of flow, its spherical shape distributes the flow accurately and with minimal disruption to pressure levels in the system. Because of this, the ball valve is great for applications in which you need to continually regulate flow.
However, the shortfalls of ball valves are not hard to come by. There are many applications that ball valves are unsuited for because they can&#;t handle the temperature, pressure or corrosivity of the materials being processed. There&#;s a limit to what ball valves can withstand before they&#;re prone to leakage, and this makes them a safety risk when used in any application that is too much for them to handle. While it&#;s not the highest performing valve, if a ball valve is all you need for your application, then it is typically the most expensive option. It&#;s also heavy, large face to face and time consuming to install.
The triple offset butterfly valve has a disc that is offset from the center of its seat. This way, as the disk moves, it navigates away from the seat rather than across it. In effect, there&#;s less wear and tear on the metal and other parts, increasing the valve&#;s lifespan. Plus, the valve is able to open and close very quickly with just a turn. The disk closure is leak-proof and frictionless and made of hardened metal able to withstand high-pressure levels and extreme hot and cold temperatures, as well as corrosive elements.
For some, the use of a triple offset valve is non-negotiable. It has features unmatched by any other valve type, making it the best option for several applications. One example is oil drilling and petroleum processing. Oil leak disasters must be minimized at all costs, and high-performance butterfly valves are the best device for a leak-proof seal. Energy power plants also require triple offset butterfly valves because they can withstand the high-pressure levels and the extremely high temperatures the materials subject them to. Plus, since they&#;re completely fire-proof, they&#;re also the safest option. Triple offset butterfly valves are the best option for cryogenic cooling plants, too, since they&#;re able to tolerate temperatures as low as -320°F.
A triple offset butterfly valve seals with a disc that opens and closes without creating friction or wear and tear over time. The result is a leak-proof device that lasts a long time before it needs any maintenance. It&#;s cost-effective and energy-efficient, as is known to reduce actuator power requirements. It&#;s torque-sealed rather than position-sealed, and its seat is placed in a way that prevents over-travel.
With its low torque, the triple offset butterfly valve enables quick opening and closing. With its ability to withstand extreme temperatures and pressure levels, you can worry less about safety hazards. You can also assure there&#;s no risk of corrosion because triple offset butterfly valves aren&#;t made with elastomers or any other material that is vulnerable to reactive chemicals.
Triple offset butterfly valves are the best option for power generation applications, and they&#;re the safest way to go for oil drill and petroleum refinery because they pose a minimal risk for leaks. Water treatment plants can also benefit from triple offset butterfly valves because they&#;re the safest, most leak-proof option.
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Whether or not your application needs ball valves or a triple offset butterfly valve depends upon whether a ball valve is enough to handle the job. If you&#;re not processing volatile materials that require different materials to prevent leaks, then you can save money by using a ball valve. On the other hand, if you pick a ball valve when you really require a triple offset butterfly valve, you&#;re putting your plant, your bottom line, and your employees&#; safety at risk. To decide on the ideal valve, consider the viscosity, temperature and pressure levels of the substances you&#;ll be processing.
What is the Difference Between a Resilient Seated Butterfly Valve & High Performance (Double Offset) Butterfly Valve?
Both resilient seat butterfly valves and double offset high-performance butterfly valves are used in various industries for controlling the flow of fluids. However, they have distinct design features and applications that set them apart. Let&#;s explore the key differences:
1. Seating Design:
- Resilient Seat Butterfly Valve: This type of valve has a soft, elastomeric (resilient) seat material, typically made of materials like EPDM or Nitrile. The resilient seat provides a bubble tight seal and zero leakage.
- Double Offset High-Performance Butterfly Valve: The double offset design refers to the two different offsets present in the valve &#; the first offset is in the shaft, and the second offset is in the disc. The double offset design enhances sealing performance and reduces wear, providing a tight shut-off even in high-pressure and high-temperature applications. A wide range of seat materials are available such as soft seats, firesafe seats, and full metal seats, each designed for specific applications and shutoff requirements.
2. Performance and Pressure Rating:
- Resilient Seat Butterfly Valve: Resilient seat valves are commonly used in low to moderate pressure and temperature applications where a tight seal is necessary. They are suitable for applications where cost is a significant consideration.
- Double Offset High-Performance Butterfly Valve: These valves are designed for high-pressure and high-temperature applications. The double offset design allows for better performance under challenging conditions, making them suitable for industries such as oil and gas, petrochemical, and power generation.
3. Applications:
- Resilient Seat Butterfly Valve: Typically used in water treatment, HVAC systems, and other applications where moderate pressure and temperature conditions are present. They are cost-effective and provide reliable performance in less demanding environments.
- Double Offset High-Performance Butterfly Valve: Suited for applications where higher pressure and temperature conditions are encountered, such as in chemical processing, power generation, and industrial processes.
4. Construction Materials:
- Resilient Seat Butterfly Valve: Generally constructed with materials such as ductile iron or cast iron with a corrosion-resistant coating. The disc and stem may also be coated for added protection.
- Double Offset High-Performance Butterfly Valve: Materials for construction may include stainless steel, alloy steel, or other high-performance materials, providing better resistance to corrosive environments and higher temperatures.
In summary, the choice between a resilient seat butterfly valve and a double offset high-performance butterfly valve depends on the specific requirements of the application, including pressure, temperature, and the desired level of performance and reliability.
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