Safety valve 90º angular type of rapid opening (pop action), full nozzle, spring loaded, adjusting ring. Design: EN ISO 4126-1 | ASME VIII | API-526 | ASME B16.34 Sizes: from 1/2″ x 3/4″ up to 1″ x 1″ Thread connections: NPTF-ANSI B1.20.3; BSP-BS 21 Materials: Stainless Steel