The maximum operating temperature for a carbon steel valve is _________ °C:

The maximum operating temperature for a carbon steel valve is 425 °C. This temperature limit is critical because carbon steel begins to lose its mechanical properties at elevated temperatures. At temperatures above this threshold, carbon steel can experience changes in strength, ductility, and toughness, which could compromise the integrity and reliability of the valve in a refrigeration system.

Operating valves above this limit could lead to issues such as deformation, leaks, and potential failure under pressure. It’s essential for technicians and operators to be aware of these limits when selecting and operating carbon steel components in refrigeration systems to ensure safety and optimal performance. In contrast, the other temperatures mentioned are above the maximum safe operating temperature, leading to risks that are generally unacceptable in industrial applications.