Metrology Glossary: Pressure Relief Valve

What Is A Pressure Relief Valve?

A pressure relief valve (PRV) plays a crucial role in ensuring the safety and integrity of hydraulic systems. Its primary purpose is to maintain the system pressure within a designated and safe range. This is achieved by the PRV’s ability to automatically open when the hydraulic pressure nears or surpasses the predetermined setpoint. Once activated, the PRV allows excess hydraulic fluid to flow back into the reservoir, effectively reducing the pressure. This essential function prevents the system pressure from exceeding its safe operational limit, which could lead to severe consequences, such as damage to system components or the creation of potentially hazardous situations.

What Are Pressure Relief Valves Used For?

Pressure relief valves (PRVs) are versatile components deployed across various applications. In hydraulic systems they protect pumps and motors from over pressurization to prevent issues like cavitation and component wear. These valves also play a crucial role in safeguarding cylinders and actuators, preventing damage to seals and rod ends caused by excessive pressure. In hydraulic piping and hoses, PRVs prevent over pressurization, reducing the risk of leaks and ruptures. Additionally, PRVs regulate pressure in accumulator systems, ensuring proper energy storage and release. In power units and packs, these valves maintain system pressure within safe limits, safeguarding components and ensuring smooth operation. Overall, PRVs contribute significantly to the reliability and safety of various systems.