2" SERIES FS20 FUSIBLE LINK SYSTEM CONSISTING OF THE SERIES 190 316 STAINLESS STEEL ANSI CLASS 150# RF FLANGED FULL PORT 2 PIECE API 607 FIRE SAFE BALL VALVE, REINFORCED TEFLON SEAT, GRAPHITE PACKING & SEALS, WITH A VALTORC USA SPRING PACK , COMPLETE WITH A VALTORC USA CUSTOM FABRICATED MOUNTING & ARMING PLATE WITH 165F. FM FUSE LINKS INSTALLED, ALL ASSEMBLED & TESTED AS A COMPLETE UNIT. THE VALVE CAN BE USED ON A DAILY BASIS FOR NORMAL OPEN & CLOSE OPERATION WHILE THE VALVE IS IN THE ARMED POSITION. THE FUSIBLE TEMPERATURE LINK IS THE ONLY PART OF THE SYSTEM WITH AN FM RATING. THE VALVE WILL FAIL TO THE CLOSED POSITION. THE MAXIMUM ALLOWABLE AMBIENT TEMPERATURE FOR THE INSTALLATION LOCATION IS 100 DEGREES F FOR THE 165 LINK VALTORC# FS20-SS-150FLG-FS-MH-165-FM