Franklin Electric 316 SS SR Submersible Pump End - 6 in and 8 in, 70-475 GPM, 5-150 HP

The SR Series pumps are designed specifically to meet a variety of applications. With stainless steel impellers and diffusers, a stainless steel shell to maintain alignment, and heavy-investment cast stainless steel suction and discharge brackets, the SR Series pumps are equipped to operate efficiently and handle the most demanding conditions.

This listing is the 316 stainless steel build of the SR Series, for water that is too corrosive for the standard 304 build. Franklin rates the 316 build to 194 °F (90 °C) maximum operating temperature against 140 °F (60 °C) for 304.

• Stainless steel impellers and diffusers to resist corrosion
• Heavy-duty stainless steel shell assures permanent alignment of all components to increase longevity and enables higher pressures than strap designs
• PTFE floating wear ring, ceramic bearing journal, and Nitrile rubber fluted bearing ensure durability against wear for long-lasting performance and reliability
• Suited to operate in horizontal position
• Built-in check valve to protect the pump against water hammer

Open your flow class and find the model that matches your build. 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.

Total head read from the published curves in Franklin’s FPS Submersible Catalog (Mi1007), 6 in and 8 in SR Series section (the 316 stainless builds share the SR hydraulics), digitized and rounded down to whole feet, at the plotted flows nearest 20%, 50% and 75% of where the curves in each class end. Franklin prints no shut-off figure for this series; the 0 GPM column reads each curve at its first plotted point. Franklin prints no output tables for this series. Feet of head = PSI × 2.31.

Best operating range: Franklin shades the recommended operating range on each published curve and prints no figures for it. The curves are in the image gallery.

• Maximum operating temperature: 140 °F/60 °C for 304 stainless steel and 194 °F/90 °C for 316 stainless steel
• Suited to operate in horizontal position
• 4 in motor (10 HP and below builds): order the 6 x 4 in motor adaptor kit 305473001
• 8 in motor: order the 6 x 8 in motor adaptor kit 305473002

• Install in a developed well; undeveloped water carries sand that wears the pump.
• Set the pump suction at least 10 ft below the expected drawdown level and at least 5 ft off the bottom of the well.
• The built-in check valve sits on the pump; add one above ground, and one in the drop pipe every 100 ft of setting beyond the first 100 ft.
• Support the riser at the wellhead and keep the cable clear of clamps and the casing while lowering.

From the Franklin 6 in and 8 in SR Series owner’s manual.

Municipal water works, Water distribution and pressure boosting, Irrigation and sprinkler systems, Water treatment plants, filtration, and reverse osmosis, Industrial cooling and processing, Mining industry, drainage and dewatering, General industry and Fountains.