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

• A. The pressure relief valve resets itself
• B. It is cheaper to install
• C. It never leaks
• D. It requires no maintenance

Answer: (A)

A pressure relief valve is preferred because it can relieve the overpressure and then reseat itself, ready to protect the receiver again without needing replacement after each event. A fusible plug opens when a threshold is reached and is a one-time device—once it activates, it must be replaced, causing downtime and extra maintenance. So the automatic reset capability of the valve makes it the better option. The other statements aren’t reliable: no device is completely leak-free, and both devices require some maintenance; the installation cost isn’t the defining advantage.