Fast application of water in spray Pre-action and foam system Size: 50, 80, 100, 150 & 200 mm. (2″, 3″, 4″, 6″ & 8″) Cast iron body & cover Maximum service pressure 12 bar (175 PSI) Bronze Seat Flanged connection dimensions to ANSI B 16.1 Diaphragm operated with rubber to metal drip-tight positive sealing Reset without any tools Service without removal from line Easily trimmed for actuation by manual, remote solenoid valve & with dry or wet pilot Internal and external surfaces epoxy coated for extra protection