What is the primary function of the relief valve of a cargo pump?

The primary function of the relief valve of a cargo pump is to prevent excessive pressure build-up within the system. When the pressure exceeds a predetermined level, the relief valve opens to allow fluid to return to the suction side of the pump. This process helps maintain safe operating pressures, prevents potential damage to equipment, and ensures the safe handling of cargo.

By allowing the return of cargo, the relief valve plays a critical role in maintaining the efficiency and safety of cargo operations. It helps manage pressure fluctuations during the pumping process and ensures that the flow of cargo is controlled, preventing overpressure situations that could lead to leaks or ruptures. Understanding the role of the relief valve in this context is vital for anyone working in cargo pump operations, ensuring they can effectively manage properly safety protocols.

In contrast, the other choices address different aspects of cargo handling but do not relate directly to the primary mechanical function of the relief valve.