Relief valves are safety valves specifically created to safeguard pressurized devices and / or systems from any over-pressurized situation. An over-pressurization problem occurs when a device generates enough pressure beyond its threshold limit value. Since high enough pressure can lead to hardware failure or even fire, it is of the utmost importance that relief valves are installed in many devices.

A relief valve works by releasing pressurized fluid through an additional passage, sending it out of the system. The relief valve (also referred to as pressure relief valve) opens at a pre-agreed set pressure and lets the selected fluid capacity flow until automatic closure (when the pressure of the device has reached a stable and secure point).

Moreover, these valves are commonly designed with elements that are well suited with the process fluids, ranging from air or water to the most abrasive media.