What is the primary role of a safety valve in a boiler system?

The primary role of a safety valve in a boiler system is to relieve excess pressure. Safety valves are critical components designed to protect the boiler from overpressure conditions that could lead to dangerous situations, such as explosions or equipment failure. When the pressure in the boiler exceeds the set limit, the safety valve opens automatically to release steam or hot water, thereby reducing the pressure to a safe level. This mechanism is essential for maintaining the integrity of the boiler and ensuring safe operation.

In contrast, increasing the boiler's efficiency relates to optimizing its operation for better fuel utilization, which is not the direct purpose of a safety valve. Controlling the water level involves maintaining the appropriate amount of water in the boiler to prevent issues such as low water conditions, which is typically managed by other devices like level controls or feedwater systems. Regulating temperature focuses on maintaining the desired thermal conditions within the boiler, which is usually achieved through control systems that adjust fuel input or flow rates, rather than through safety valves.