A Pressure Safety Valve (PSV) or Pressure Relief Valve (PRV) is a pressure relief device which is designed automatically releases a substance when the pressure or temperature exceeds preset limits, and reclose and prevent the further flow of fluid.
Reference Definition by Wermac.org: A Pressure Relief Valve is a safety device designed to protect a pressurized vessel or system during an overpressure event. An overpressure event refers to any condition which would cause pressure in a vessel or system to increase beyond the specified design pressure or maximum allowable working pressure (MAWP). The primary purpose of a pressure Relief Valve is protection of life and property by venting fluid from an overpressurised vessel.
Related Definitions in the Project: The Process Safety Engineering
