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Table 5 Data on sprinkler system pump reliability

From: A review of sprinkler system effectiveness studies

Description Source Unit Minimum Mean Maximum
Starting device (Watanabe 1979) per demand   6.84 × 10 -3  
Fail to start (Moelling et al. 1980) per demand 4.5 × 10 -3 1.4 × 10 -2 2.4 × 10 -2
Diesel (Moinuddin et al. 2009) per demand   8.41 × 10 -2 1.21 × 10 -1
Electric (Moinuddin et al. 2009) per demand   1.27 × 10 -2 1.90 × 10 -2
Diesel (Ronty and Keski-Rahkonen 2004) failures/year 8.7 × 10 -3 1.5 × 10 -2 2.3 × 10 -2
Electric (Ronty and Keski-Rahkonen 2004) failures/year 2.5 × 10 -3 6.2 × 10 -3 1.3 × 10 -3
Diesel (Critical) (SINTEF 2009) failures/ 120 210 310
   106 calendar hours    
Diesel (All Modes) (SINTEF 2009) failures/ 680 840 1000
   106 calendar hours    
Electric (Critical) (SINTEF 2009) failures/ 24 72 170
   106 calendar hours    
Electric (All Modes) (SINTEF 2009) failures/ 120 210 340
   106 calendar hours