Back صمام تنفيس Arabic Dispositiu d'alleujament de pressió Catalan Pojišťovací ventil Czech Dispositivos de alivio de presión Spanish شیر اطمینان Persian Limiteur de pression French Ventil za ograničavanje tlaka Croatian Katup pelepas ID Сақтандырушы жабдық Kazakh Сбросной клапан (сантехника) Russian
A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; excessive pressure might otherwise build up and create a process upset, instrument or equipment failure, explosion, or fire.