A check valve is generally considered a safeguard against the hazard of which process variable?

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Multiple Choice

A check valve is generally considered a safeguard against the hazard of which process variable?

Explanation:
A check valve is designed to allow fluid to flow in only one direction and to close if flow attempts to go backward. This directly guards against backflow, a hazard tied to the flow of the process. If reverse flow occurs, it can contaminate the process, cause mixing of incompatible streams, or place unintended stresses on pumps and piping. It doesn’t primarily control or prevent hazards tied to pressure, temperature, or level, which are managed by other types of equipment. So the safeguard addressed by a check valve is flow, specifically the risk of reverse flow.

A check valve is designed to allow fluid to flow in only one direction and to close if flow attempts to go backward. This directly guards against backflow, a hazard tied to the flow of the process. If reverse flow occurs, it can contaminate the process, cause mixing of incompatible streams, or place unintended stresses on pumps and piping. It doesn’t primarily control or prevent hazards tied to pressure, temperature, or level, which are managed by other types of equipment. So the safeguard addressed by a check valve is flow, specifically the risk of reverse flow.

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