Definitions for "PRESSURE RELIEF DEVICE"
A device actuated by inlet static pressure and designed to open during an emergency or abnormal condition to prevent a rise of internal pressure in excess of a specified value. ( 557)
Used to relieve excessive pressure inside tank. Generally operates at 71/2 psi. Self-resealing with target indicator to show operation. Alarm contacts are optional.
A pressure-actuated valve or rupture member designed to relieve excessive pressure automatically.