What is the main feature of a relief valve?

The main feature of a relief valve is to release excessive pressure within the pump. This is crucial for maintaining the safe operation of the fire apparatus system. When the pressure in the system surpasses a predetermined limit, the relief valve opens to allow fluid to escape, thereby preventing damage to the pump and other components due to over-pressurization.

Relief valves are essential in hydraulic systems to ensure they operate within safe pressure parameters. This helps to protect the integrity of the fire apparatus and ensures reliable performance during emergency situations. By managing pressure, relief valves play a pivotal role in enhancing safety and functionality.

In contrast, increasing pump pressure, preventing overheating, or controlling flow direction are functions handled by other components within the system, rather than the primary responsibility of the relief valve.