Metal Pressure Safety Valve

A Pressure Safety Valve PSV is a type of valve used in the petroleum downstream midstream upstream and chemical processing industries to quickly release gasses from equipment in order to avoid overpressurization and potential process safety incidents PSVs are activated automatically when pressure exceeds prescribed pressure limits in order to return equipment pressure to a safe operating level While the term is sometimes used interchangeably with pressure relief valve PRV there is a difference between the two A PSV is opened suddenly once the pressure hits a certain level while a PRV opens gradually in relation to the pressure