FMF Series Mixed Flow Vertical Turbine

Technical Product Description:

The Franklin Electric FMF Series Mixed Flow Vertical Turbine is a vertical lineshaft turbine pump designed for high-flow, moderate-head water movement in demanding commercial, municipal, and industrial applications. Franklin Electric states that the FMF Series is used where water supply is readily available from rivers, lakes, ponds, streams, or water wells, making it well suited for installations that require moving large volumes of water efficiently.  

Franklin specifies that the FMF Series uses a mixed-flow impeller design constructed of bronze, paired with a heavy wall bowl assembly that is vitreous enamel lined up to 15 inches standard. According to Franklin, this design provides a very broad operating range with very high efficiency, supporting dependable performance across a wide range of operating conditions.  

Franklin’s vertical lineshaft turbine brochure indicates that the FMF Series is available in 6-inch through 30-inch bowl sizes, with flows up to 20,000 GPM, heads up to 150 feet, liquid temperatures up to 200°F, and speed ranges from 1,800 RPM down to 450 RPM. These published values position the FMF Series as a high-capacity mixed-flow option between deep-set vertical turbine designs and lower-head axial-flow alternatives.  

Franklin also notes in its agricultural irrigation guidance that FMF Series mixed flow pumps work in depths up to 150 feet, while axial-flow FAF pumps are intended for shallower depth sets. With its mixed-flow hydraulic design, very high capacity, and moderate-head operating profile, the FMF Series is a strong option for irrigation water transfer, surface water movement, and other large-volume pumping systems. The final sentence is an inference based on Franklin’s published use cases and performance ranges. 

Key Technical Features:

• Mixed flow vertical lineshaft turbine design for high-flow service.  
• Used in commercial, municipal, and industrial applications with readily available water supply.  
• Suitable for sources such as rivers, lakes, ponds, streams, and water wells.  
• Bronze mixed-flow impeller construction.  
• Heavy wall bowl assembly with vitreous enamel lining up to 15 inches standard.  
• Available in 6-inch to 30-inch bowl sizes.  
• Flows up to 20,000 GPM.  
• Heads up to 150 feet.  
• Temperatures up to 200°F. 
• Speed range from 1,800 RPM to 450 RPM.