Figure 7. Weight comparison between wafer type butterfly valves and ball valves
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2.3. Weight ComparisonFigure 7 compares the weight of a bare stem butterfly valve and a ball valve in size ranges of 4” and 20” and a pressure class of 150. The weights of valves are also based on manufacturer standards. Wafer type butterfly valves in class 150 and size ranges from 4” to 20” are approximately 75% lighter than ball valves with the same size and pressure class, based on the data provided in Figure 7.
2.4. Torque ComparisonTorque is a measure of the force placed on a valve operator to rotate the valve closure member to open or close a valve. The breakaway torque is the maximum thrust or torque required to operate a valve at maximum pressure differential. 10, 11 A butterfly valve has a lighter disk (closure member) compared to the ball of the ball valve, so the torque values are lower. Table 4 shows a comparison of the torque values of a 10” butterfly valve Class 150 with a ball valve in the same size and pressure class and safety function. Both valves are usually open and will be closed in case of any failure occurring in the system. Additionally, the effect of torque on actuator sizing of the valve will be evaluated. Torque values are different from one supplier to another. These are the torque values compared in Table 4:
- BTO (Break to Open)
- ETO (End to Open)
- Running
- BTC (Break to Close)
- ETC (End to Close).
The measured torque values are obtained by applying design pressure equal to 20Barg to one side of the valve during the operation. The breakaway torque is BTO for both ball and butterfly valves. The BTO for a ball valve is 2.12 times larger than the BTO for the butterfly valve in this example. The valves are actuated and the next step is to compare the size of the selected actuator for these two valves. An actuator is a mechanical device installed on the top of a valve for automatic operation. Both valves in this example are operated with pneumatic actuators. The safety factor for the actuator in this example is 2.0, which means that the torques produced by the pneumatic actuator in 7Barg air pressure should be at least two times the valve torque values given in Table 4. The most compact actuator, which can produce at least twice the torque values given in Table 4, was selected for the valves based on the torque data in Table 5 and Table 6.
The pneumatic actuator Model Y selected for the ball valve generates more torque and is larger than the pneumatic actuator Model X selected for the butterfly valve. Figure 8 compares the overall dimensions of the pneumatic actuators selected for the ball and butterfly valves. The dimensional values in red are for pneumatic actuator Model X, which is selected for the butterfly valve. The figure shows that the actuator selected for the butterfly valve is more compact.
3.
ConclusionThis paper discusses different reasons to select a butterfly valve instead of a ball valve for utility services. Butterfly valves have more compact face-to-face values and are lighter than ball valves. They also require less torque for operation which leads to savings on actuator space, weight, and cost. In fact, there is much space limitation on offshore platforms compared to onshore units. Additionally, offshore platforms have limited weight capacity so it is an advantage to save space and weight on the platforms through selecting a lighter and more compact valve.
When sourcing quality parts for a 2 inch butterfly valve, there are a variety of factors to consider. From the type of material used to the design requirements and vendor reputation, these factors can all have an influence on the performance and reliability of an industrial system. It’s important to equip machinery with quality components that will last, so understanding what these considerations are is vital for success.
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2 inch butterfly valves are a type of industrial pipe fitting commonly used to control the flow of fluids, gases and other substances in an efficient manner. These valve actuators sit between two lengths of pipe and open or close with the turning of a handle or wheel. They feature an inner disc that can be positioned at different points along the circumference of the valve opening, allowing for precise adjustments in the volume or direction of flow.
Butterfly valves are popular because they offer low pressure drop, require less space than other alternatives and come in a range of materials suitable for almost any application. Additionally, they’re easy to install and maintain, making them ideal for industrial settings where maintenance costs must be kept low.
Quality parts for a wafer butterfly valve are essential in order to ensure optimal performance and longevity of the equipment. High-grade materials can make all the difference when it comes to safety, durability and leak prevention. Additionally, the parts must be designed to match the conditions of each application as well as any other components with which they will interact. Quality parts also require less maintenance and repair work over time, allowing for cost savings throughout the life of the system. This is why it’s so important to take time to research different suppliers and thoroughly evaluate factors such as manufacture quality, product features, warranty coverage, turnaround times and more before making a purchasing decision.
Discover the dimensions of wafer butterfly valves! Sizes range from 2″ -40″. Watch our informative video to gain insights into this essential butterfly valve technology.
When sourcing quality parts for a lug butterfly valve, there are several important factors to consider. First and foremost is the grade or type of material being used in the part. Lower-grade materials may be cheaper but they can wear out quickly and won’t stand up under extreme conditions. Additionally, it’s important to look at how long the supplier has been in business, since this will give insight into their production capabilities and experience. Other considerations include service capabilities such as turnaround times, pricing structure, and whether or not custom parts can be provided on demand. Last but not least, product warranties should also be taken into account as these offer extra insurance against defects or poor performance in an applied setting.
The material type of a part is an important factor to consider when selecting quality parts for a 2-inch butterfly valve. Different grades of materials have different characteristics and performance levels, so knowing which one is best suited to the specific application is essential. In some cases, metals such as stainless steel or carbon steel may be ideal and in other applications, plastics or composite materials may be preferable. It’s also important to understand the effects of corrosion and temperature extremes on the materials being considered. Taking the time to research the different grades and types of materials will ensure that the right part is selected for optimal performance and long-term use.
Design requirements are another key factor to consider when sourcing quality parts for a 2 inch butterfly valve. It’s important to think through the exact specifications and size requirements of the part, as well as how it will interact with other components in an overall system. In many cases, specific materials and configurations may be necessary to ensure safety and precise operation, so understanding the exact design needs ahead of time is critical. Customized or off-the-shelf parts can be obtained for most applications, but knowing what works best for a particular use case is essential when looking for optimal performance. china ball valve
When sourcing parts for a flanged butterfly valve, it is important to consider the reputation and experience of the vendor. A good supplier should have a track record of providing reliable, high-quality parts with timely delivery and excellent support services.
It’s also beneficial to find out how long they have been in business, which can give an indication of their commitment levels, as well as the types of products they supply and how flexible they are when it comes to customization. Knowing that you can trust the vendor to provide what is required is essential for any successful project or installation.
Certification and testing standards are also important to consider when sourcing parts for a 2-inch butterfly valve. Checking out whether the vendor has ISO 9001 certification or equivalent is a good indication that they are committed to quality assurance and traceability, while looking up what safety tests may be required by law can help ensure that the part is suitable for its intended purpose. Understanding any relevant laboratory testing protocols can provide more confidence in the part’s performance, as well as peace of mind that it has been assessed for potential risks.
When sourcing quality parts for your 2 inch butterfly valve, there are several factors to consider from the vendor’s reputation and experience to certification and testing standards. Doing your research can ensure that you get parts that meet your needs and are compliant with relevant regulations. It is also important to factor in cost as well as any potential delivery delays or customization options needed. Investing time into selecting the right vendor and part can make all the difference to the success of a project, so be sure to keep these key considerations in mind.
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