Disc Check Valve (Non Return Valve) SPECIFICATIONSModel DNRVBody CF8 / CF8MSize Range 1/2″ to 4″ Screwed End, 1/2″ to 12″ Wafer Type, 1.1/4″ to 2″ Lug typeDisc. S.S. 304 / 316Seat Metal to Metal (PTFE / EPDM On Request)Temprature Max. 300 °CPressure rating PN20 , PN40End Connection Screwed End / Wafer type / Lug type.