What are the requirements for gaskets, O-rings, sealants, and valve components?

• A. All gaskets, O-rings, and sealants shall be compatible with the agent.
• B. Valves shall be protected against mechanical damage.
• C. All gaskets, O-rings, sealants, and other valve components shall be constructed of materials that are compatible with the agent, and valves shall be protected against mechanical, chemical or other damage.
• D. Valve components need not be compatible.

Answer: (C)

Material compatibility between the clean agent and all sealing and valve components is essential because exposure to the agent can cause swelling, softening, erosion, or chemical attack, leading to leaks or valve failure. The best answer requires that all gaskets, O-rings, sealants, and other valve components be made from materials compatible with the agent, and that valves be protected against mechanical, chemical, or other damage that could compromise their integrity. The other options are incomplete or incorrect because they neglect either some components or the need to guard against damage, which is necessary to maintain the system’s performance and safety.