68-4-ANSI150RF DE HRV PI 4”IS THE DIAMETER OF THE VALVE. THE VALVE MUST BE COMPLETELY ASSEMBLED AT THE FACTORY AND TESTED. IT MUST BE RECEIVED READY FOR ASSEMBLY IN THE PLANT. BODY: DUCTILE IRON A536 FLANGES B16.5 RF #150 PAINT: EPOXY HIGH BUILT FB, FIRE RED STD. DIAPHRAGM NEOPRENE DELUGE VALVE CONTROLLED AND ACTUATED BY A HYDRAULIC PILOT. THE VALVE IS CLOSED IN ITS NORMAL SETTING POSITION AND OPENS WHEN THERE IS A LOSS OF PRESSURE IN THE PILOT LINE THAT SWITCHES THE HYDRAULIC RELAY THE LOSS OF PRESSURE IN THE PILOT LINE CAN BE DUE TO THE OPENING OF A MANUAL VALVE ASSOCIATED WITH IT, A SPRINKLER THAT BROKE ITS BULB OR ANY OTHER METHOD THAT DEPRESSURIZES THE PILOT LINE. IT ALSO HAS A MANUAL OPENING VALVE THAT OPERATES DIRECTLY DEPRESSURIZING THE DIAPHRAGM CHAMBER AND GENERATING IMMEDIATE OPENING OF THE VALVE. AS AN OPTION, IT CAN BE REQUESTED TO INCLUDE A MANUAL RESET (NOT REQUIRED IN THIS NEED). HRV 66-2UL BRONZE/BRASS PILOT. BRONZE/BRASS FITTINGS. COPPER TUBING. MANOMETERS, QUANTITY 2 INLET PRESSURE AND PILOT LINE PRESSURE. OPTIONAL: UPSTREAM DRAINAGE VALVE: NOT REQUIRED. ALARM LOOP OR TRIM, INCLUDING PRESSURE SWITH IP65 HIGH PRESSURE, SYSTEM SENSOR OR POTTER, SYSTEM ACTIVATION NOTICE. ALARM TRIM LOCATION. WATER MOTOR ALARM, ALARM ACTIVATED BY HYDRAULIC MOTOR, (ONLY LOOSE ELEME