water treatment
GPM (Gallons Per Minute)
A flow-rate metric used for water treatment equipment sizing, particularly UV sterilisers, ozonators, and pumps.
GPM (Gallons Per Minute) is a flow-rate unit used in water treatment, particularly for sizing UV sterilisers, ozonator dose, RO recovery, and pump capacity. 1 US GPM ≈ 3.785 LPM ≈ 227 LPH.
Common UV steriliser sizing in Indian beverage plants:
- 30 BPM water plant: 12 GPM UV (45 LPM)
- 60 BPM water plant: 24 GPM UV (90 LPM)
- 90 BPM water plant: 40 GPM UV (150 LPM)
- 120 BPM water plant: 60 GPM UV (225 LPM)
- 240 BPM water plant: 120 GPM UV (450 LPM)
Always size 25% above peak flow for UV, fouled quartz sleeves reduce effective dose, and Indian feedwater has more turbidity variation than design assumes.
Related terms
UV Sterilisation
Ultraviolet light (typically 254 nm) used to inactivate microorganisms in water.
Ozonation
The use of ozone (O₃) gas to disinfect water, standard final-step disinfection in packaged drinking water plants.
Reverse Osmosis (RO)
A pressure-driven membrane filtration process that removes dissolved salts, organics, and pathogens from water.
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