What is the advantage of using a pressure relief valve to protect a receiver instead of a fusible plug?

A. Pressure relief valves are less expensive.
B. The pressure relief valve resets itself.
C. Pressure relief valves can also be used to check the receiver pressure.
D. It is impossible for a pressure relief valve to malfunction.

The advantage of using a pressure relief valve to protect a receiver instead of a fusible plug is the pressure relief valves can also be used to check the receiver pressure.

What is fusible plug?

Fusible plug is a brass or bronze device that is fitted to the top of the boiler in steam powered systems. It is filled with a metal alloy that melts at a predetermined temperature. When the temperature in the boiler reaches the melting point of the metal alloy, the plug melts and releases the steam pressure, preventing the boiler from exploding. Fusible plugs are used to protect against overheating, over-pressurizing, and low water levels. The plug is typically installed in the highest part of the boiler, as steam rises and heat concentrates there. Periodic maintenance is required to ensure that the plug is operating properly.

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