In systems with a safety head, what is the main purpose of the pressure relief valve?

The primary function of a pressure relief valve in systems that include a safety head is to protect against overpressure. This device acts as a critical safety mechanism that ensures pressure levels within a system remain within designated limits. If the pressure exceeds these limits, the relief valve opens and allows fluid to escape, thereby preventing potential failures, explosions, or leaks that can occur due to excessive pressure build-up.

By providing an escape route for pressurized fluids, the pressure relief valve helps maintain system integrity and safety. It is essential in applications such as boilers, gas storage tanks, and piping systems where the risk of overpressure can pose significant hazards.

While there may be components that enhance efficiency or improve gas flow, these are not the primary role of a pressure relief valve. Similarly, regulating temperature is usually managed through other means, such as temperature control valves or cooling systems, rather than through pressure relief valves. The main focus remains on safeguarding the system against dangerous pressure scenarios.