... ALARM VALVE , RETARDING CHAMBER , WATER MOTOR GONE , AND GAUGES AND PRESSURE SWITCH WET ALARM VAVLE SIZE DN 80,DN125,DN100,DN150,DN200 ... (3",4" 5" 6"including following partsRETARDING CHAMBER ,PRESSURE SWITCH ,WATER MOTOR GONE ,2.WORKING TEMPERATURE -40-+70c, Hydro ... test pressure 100% at 350psi3.WORKING PRESSURE 0.14MP TO 0.16MPADiameter : 80mm, 100mm, ...