Views: 0 Author: J-VALVES Publish Time: 2025-04-25 Origin: Site
In many high-temperature and high-pressure scenarios in industrial production, the choice of butterfly valves is quite an important matter. Today, let's make a good comparison between BRONZE BUTTERFLY VALVES and stainless steel BUTTERFLY VALVES to see what the differences are in terms of material performance and standard adaptability.
BRONZE BUTTERFLY VALVES have a certain degree of corrosion resistance. Especially for some media like weak acids and alkalis, they can withstand them and perform fairly well in less severe corrosive environments. However, when encountering highly corrosive environments, such as places with a large amount of strong acids and alkalis, they may struggle.
Stainless steel butterfly valves are quite different. They generally have relatively strong corrosion resistance. Especially stainless steel materials like 316 and 316L, which contain molybdenum elements, can resist corrosion well and remain stable in various acid-base environments, even in environments where chloride ions are present (for example, around some industrial facilities by the seaside).
The high-temperature resistance ability of bronze butterfly valves is relatively limited. Generally speaking, they can withstand temperatures ranging from about 200 °C to 300 °C. If the temperature goes higher, their performance may start to decline, and the material is prone to deformation and other problems.
Stainless steel butterfly valves are more powerful in terms of high-temperature resistance. For example, common 304 stainless steel butterfly valves can easily handle high-temperature environments around 400 °C. If it is a butterfly valve made of a special high-temperature-resistant stainless steel material like 310S, it can withstand even higher temperatures, reaching around 1000 °C without any problem. So, it can better "withstand" in high-temperature environments.
Although the mechanical strength of bronze butterfly valves is acceptable, they are somewhat inferior compared to stainless steel butterfly valves in high-pressure environments. As the pressure increases, the risk of leakage or structural damage will increase.
Stainless steel butterfly valves perform excellently in withstanding high pressure due to their high material strength. They can work normally in relatively high-pressure environments, ensuring the stable transmission of media and are less likely to be damaged due to excessive pressure.
Bronze butterfly valves have quite good machinability. They are relatively easy to be cast into various shapes, the manufacturing process is relatively simple, and the cost can sometimes be controlled relatively well.
Stainless steel butterfly valves, on the other hand, have relatively greater difficulty in processing. Especially for some processing with high precision requirements, higher requirements are placed on equipment and processes. However, the finished products processed have high precision and reliable quality.
Let's organize these comparisons of material performance into a table for a clearer view:
COMPARISON ITEMS | BRONZE BUTTERFLY VALVES | STAINLESS STEEL BUTTERFLY VALVES |
Corrosion Resistance | Have certain resistance to weak acids and alkalis, perform poorly in highly corrosive environments. | Generally have strong corrosion resistance, and some materials can resist various highly corrosive environments. |
High-Temperature Resistance | Generally can withstand high temperatures around 200 °C - 300 °C, and problems may occur if the temperature is higher. | For example, 304 can handle high temperatures around 400 °C, and 310S can reach around 1000 °C. |
High-Pressure Resistance | Prone to risks such as leakage in high-pressure environments, with relatively weak high-pressure resistance. | High strength, can work stably in relatively high-pressure environments. |
Machinability | Relatively easy to process, simple casting, and easy cost control. | Greater processing difficulty, high requirements for high-precision processing, and the finished products have high precision and reliable quality. |
In China, both bronze butterfly valves and stainless steel butterfly valves need to comply with relevant valve manufacturing standards. Standards like GB/T 12238 stipulate their size specifications, basic performance requirements, etc. However, in terms of specific material testing and the refinement of performance indicators, there will be different detailed requirements according to the different characteristics of bronze and stainless steel.
For example, for bronze butterfly valves, the focus will be on detecting whether their compositions meet the standard range of bronze materials. As for stainless steel butterfly valves, more attention will be paid to whether the contents of various elements corresponding to the stainless steel materials, metallographic structures, etc. meet the corresponding stainless steel standards.
Internationally, standards like ISO standards and API standards also cover these two types of BUTTERFLY VALVES.
In ISO standards, more attention is paid to the universality and stability requirements of bronze butterfly valves in some conventional industrial scenarios. For stainless steel butterfly valves, because they are used in a wider range of application scenarios, such as in different temperature, pressure, and medium environments, the ranges of various performance indicators stipulated in the standards are more detailed and comprehensive.
The API standards are similar. They are widely used in industries such as petrochemicals. Since stainless steel butterfly valves often work in harsh environments with high temperature, high pressure, and complex media, relevant standards have very strict requirements for aspects such as quality and performance verification. For bronze butterfly valves, relatively speaking, on the basis of meeting basic requirements, the requirements in terms of adaptability are not that complicated.
Overall, in high-temperature and high-pressure scenarios, stainless steel butterfly valves usually have an advantage in material performance. However, BRONZE BUTTERFLY VALVES also have their own roles in some specific scenarios where corrosion resistance and processing costs are required. Moreover, the respective applicable standards are all to better regulate their production and use, enabling us to make a clearer choice and select the most suitable butterfly valves for our own industrial scenarios.
I hope this article can help everyone better understand the situations of BRONZE BUTTERFLY VALVES and stainless steel butterfly valves in high-temperature and high-pressure scenarios. If you have any questions, feel free to ask at any time.
