What happens if the pressure in the system exceeds the limits specified for the relief valve?

If the pressure in the system exceeds the limits specified for the relief valve, the relief valve is designed to open and discharge excess pressure. This mechanism is a crucial safety feature that prevents potential damage or catastrophic failure in the system. When the pressure exceeds a predetermined level, the relief valve activates, allowing fluid (or gas) to escape the system. This action reduces the pressure back to safe levels, protecting equipment and ensuring safe operational conditions.

In this context, the relief valve serves as a safeguard against situations that could cause over-pressurization, which can lead to leaks, explosions, or other hazards associated with excessive pressure buildup. Hence, the discharge of fuel oil (or other fluids depending on the system) through the relief valve is an essential protective function, allowing for safe operation of the mechanical systems involved.