What is the function of a check valve?

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Multiple Choice

What is the function of a check valve?

Explanation:
A check valve is designed to let fluid flow in only one direction. It stays closed when there’s a risk of backflow, preventing reverse movement that could damage equipment or contaminate the system. The valve uses a movable element (like a disk, ball, or flap) that is pushed open by forward flow and seals against its seat when flow reverses, all without any external actuation. This one-way action is what makes it ideal for protecting pumps, maintaining prime, and stopping backflow in fuel, hydraulic, or pneumatic lines. Regulating flow, storing energy, or mixing fluids are different functions handled by other types of valves, not by a check valve.

A check valve is designed to let fluid flow in only one direction. It stays closed when there’s a risk of backflow, preventing reverse movement that could damage equipment or contaminate the system. The valve uses a movable element (like a disk, ball, or flap) that is pushed open by forward flow and seals against its seat when flow reverses, all without any external actuation. This one-way action is what makes it ideal for protecting pumps, maintaining prime, and stopping backflow in fuel, hydraulic, or pneumatic lines. Regulating flow, storing energy, or mixing fluids are different functions handled by other types of valves, not by a check valve.

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