Brass and bronze valves are never used in systems exceeding which temperature?

Brass and bronze materials have specific limitations concerning their application in high-temperature environments. These alloys typically have a melting point that is lower than that of more heat-resistant materials, which makes them less suitable for high-temperature systems. Specifically, brass and bronze valves are generally not recommended for use in systems exceeding 550°F due to the risk of degradation at higher temperatures.

At temperatures above this threshold, the likelihood of losing mechanical properties such as strength and structural integrity increases significantly. These materials can become soft and lose their effectiveness in sealing, which can lead to failures in systems where reliability is critical. For applications where higher temperatures are anticipated, materials like stainless steel or other heat-resistant alloys are preferred because they maintain their strength and functionality under those conditions. Thus, the correct choice emphasizes the limitations of brass and bronze in high-temperature operations.