SAFETY VALVE AND RELIEF; PN40XDN80 DN50 PN16; MODEL 4412.4544; 10TH, 16BAR; CONNECTION OF ENTRY DN50 PN40; CONNECTION OUTPUT DN80 PN16; DIAMETER OF HOLE 46MM; SEAL METAL; NOZZLE PARTIAL; WITH LEVER AND LOCK FOR HYDROSTATIC TESTING; BODY: CARBON STEEL DIN 1.0619 (SA-216WCB); CLOSED CASTLE: CAST IRON DIN 0.7043 (SA 395 GR.60-40-18); SHUTTER / DISC: STAINLESS STEEL DIN 1.4122 (AISI420 RM); HEADQUARTERS: DIN1.4404 STAINLESS STEEL (AISI 316 L); STEM: STAINLESS STEEL DIN 1.4021 (AISI 420); SPRING: ALLOY STEEL DIN 1.8159 (AISI 6150); NUMBER OF SERIE 10221603-14.11.2007