In an Emergency Oxygen Supply Connection, check valves are required to be constructed from which of the following materials?

In an Emergency Oxygen Supply Connection, check valves are required to be constructed from brass or bronze due to their specific properties that make them highly suitable for use in medical gas systems. Brass and bronze are known for their corrosion resistance and strength, which is critical in ensuring the safety and reliability of oxygen delivery systems.

These materials can withstand the demands of high-pressure environments often associated with medical oxygen systems. Additionally, brass and bronze have excellent mechanical strength, which helps prevent failures that could lead to leaks or system malfunctions.

In contrast, plastic is not appropriate for check valves in this context due to its lack of strength and potential for degradation over time, especially when exposed to high-pressure gases. Stainless steel, while strong and resistant to corrosion, may not be the preferred choice because it can be more expensive and heavier than brass or bronze for this application. Aluminum, while lightweight, does not possess the same level of mechanical strength and resistance to corrosion that brass or bronze offers in oxygen service. Therefore, brass or bronze is the standard choice for check valves in emergency oxygen supply connections.