The Bowie Pump is a rotary gear pump. The delivery rate will vary some with the differential pressure and the viscosity of the liquid. Bowie Pumps operate either clockwise or counterclockwise with equal efficiency.

Jack Tyler Engineering sells & services the entire line of Bowie pumps, including:

• 300 Series Pumps
  Bushing Type Pump.
  
• 400 Series Pumps
  Outboard Ball Bearings. Bearings isolated from pumped product by way of separated glands.
  
• 500 Series Pumps
  Ball Bearings Type Pump.
  
• 8100/9100 Series
  8100 Series is a aluminum bronze bushing pump. 9100 Series is a ductile iron bushing pump
  
• 7500/9500 Series
  Bearing Type Pump

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.