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A fire signal butterfly valve, also known as a fire signal check valve or fire signal damp valve, is a crucial component in fire protection systems. Its main function is to control the flow of water or other extinguishing agents in response to a fire signal.

When a fire alarm is triggered, the fire signal butterfly valve opens to allow water or extinguishing agent to flow through the system. This helps to suppress and control the fire by providing an immediate response.

These valves are often installed in water supply lines that feed into sprinkler systems, fire hydrants, or standpipe systems.