Charging density of propane heptafluoride:≤1150kg/m3 Charging pressure (at 20℃):2.5MPa/4.2MPa Max. working pressure:4.2MPa/5.4MPa Spraying time of extinguishant:≤10s Capacity of propane heptafluoride cylinder (L):40/70/90/100/120/150/180 Working power supply:AC 220V/50Hz Reserve power supply:DC 24V Power consumption:≤15W at security, ≤30W at alarm. Atmosphere temperature in the reserve room:-10~+50℃ Max. protection capacity for one area:2000m3 Starting technique:Automatic, electric manual, mechanic operation at emergency.