In a heating system, what purpose does the pressure relief valve serve?

The pressure relief valve plays a critical role in a heating system by releasing excess pressure that can build up within the system. When the pressure exceeds a predetermined level, the valve opens, allowing some of the fluid—typically water or steam—to escape. This action is essential for preventing potential failures such as ruptures or explosions that could result from excessive pressure.

Maintaining optimal pressure levels is vital for the safe and efficient operation of heating systems, as too much pressure can cause components to weaken or fail. Therefore, the pressure relief valve is designed to protect the system, ensuring that it operates within safe pressure limits while preventing catastrophic failure. This safety feature makes it a crucial component in mechanical and heating systems alike.