Bowie
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Bowie gear pumps The Series 300, 400, and 500 the 2", 3", and 4" Bowie Pumps are designed and recommended to be operated not to exceed 400 RPM and not in excess of 100 PSI of pressure. At this speed the 2" Bowie Pump will deliver approximately 140 GPM at no discharge pressure. The 3" Bowie Pump will deliver approximately 238 GPM. The 4" Bowie Pump will deliver approximately 310 GPM.