What is the primary purpose of a pressure relief valve in a power boiler?

The primary purpose of a pressure relief valve in a power boiler is to prevent excessive pressure build-up. This safety device is crucial as it is designed to open automatically and release excess pressure from the boiler, thus protecting the system from the dangerous consequences of overpressure.

When the pressure in the boiler exceeds a predetermined level, the relief valve activates, allowing steam or water to escape. This prevents potential catastrophic failures that could arise from structural failure of the boiler due to excessive pressure, such as explosions or ruptures.

The role of the pressure relief valve is essential for maintaining safe operating conditions within the boiler, ensuring that it operates within the specified limits to protect both the equipment and the personnel operating it. The function of the valve is purely safety-oriented, making it a critical component in boiler design and operation.