Franklin Electric 5 in STS Submersible Turbine Pump End - Ductile Iron

The STS Series is a submersible turbine: premium ductile iron castings, investment cast stainless steel impellers and spiral cutlass rubber intermediate bearings for wells with abrasive water. The STS family covers 90 to 1,450 GPM at best efficiency point and total dynamic head up to 2,300 ft, from 5 to 200 HP.

• 100% Franklin Electric factory wet tested with test results shipped with each pump
• Premium ductile iron casting for longer life and higher pressures
• Investment cast stainless steel impellers for maximum abrasion resistance
• Longer discharge and motor bracket bearings for increased pump life
• Spiral cutlass rubber intermediate bearings designed for harsh environments

Open your flow class and find your model. Total head is the lift from the pumping water level, plus the pressure you need at the top (2.31 ft for every PSI), plus friction in the column pipe. Pick the model whose head at your flow covers that total.

Read from Franklin’s published STS curves in the FPS Submersible Catalog (Mi1007), 5 in STS Series section, digitized and rounded down to whole feet. A, B and C trim builds: Franklin’s single-stage curve for that impeller trim times the number of stages. X (mixed-trim) builds: Franklin’s published curve for that horsepower. Franklin prints no output tables or separate shut-off figures for this series; the 0 GPM column reads each curve at its first plotted point (0 or 1 GPM). Model numbers are shown without their last two digits (discharge size and motor fit), which do not change performance. Bold = the last plotted point; — = beyond it. Feet of head = PSI × 2.31.

Builds whose curve Franklin publishes only as part of a mixed-trim family: 180STS25D5X-13. Performance for these builds is confirmed on request.

Best operating range: Franklin marks the efficiency contours on each single-stage curve and prints no figures for the range. The curves are in the image gallery.