49 f l o w de ter m i n e s p i p e s i z e Liquid velocity is critical to keep solids in suspension If velocity is too slow solids drop out If its too fast friction loss becomes an issue The chart on the right shows four different measurements for fow along with the corresponding hosepipe size in inches Determining the fow is the frst step in designing a complete pump system because fow determines the size of the pipe When fow is not known calculate quantity and divide by the time required to move the liquid F F 40 20 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 302 C C 40 20 0 20 40 60 80 100 120 140 150 US gpm US gpm 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6341 m 3 h m 3 h 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1440 lmin 400 50 100 150 200 250 300 350 0 ls lmin ls 24000 22000 20000 18000 16000 14000 12000 10000 8000 6000 4000 2000 0 HP HP 0 10 20 30 40 50 60 70 80 90 100 110 120 130 134 kW kW 0 10 20 30 40 50 60 70 80 90 100 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 3346 ft H 2 O ft H 2 O m H 2 O m H 2 O 0 10 20 30 40 50 60 70 80 90 102 100 PSI PSI 0 145 10 20 30 40 50 60 70 80 90 100 110 120 130 140 2 3 4 5 6 7 8 9 10 1 0 BAR Pressure Effect Flow T emperature BAR Quantity Liters Liters Meters Gallons Time Minute Second Hour Minute Flow lmin lsec mhr gpm Flow 18 Pipe 12 Pipe 10 Pipe 8 Pipe 6 Pipe 4 Pipe