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Protecting Thermal Valves in an Extinguishing System
Thermal protection for valves in an extinguishing system

I'm designing an extinguishing system for pumping station. There are valves with thermal protection inputs going to my PLC. What this "thermal protection" input stands for?

You'll have to give us a little more information on the type of valves you have. Are they thermal valves that operate on temperature? Or valves that have actuators thermally (and maybe overload) protected?