4" SUBMERSIBLE MOTORS SUPER STAINLESS
4" SUBMERSIBLE MOTORS
HIGH THRUST
 
 

4" SUBMERSIBLE MOTORS HIGH THRUST
 
 
 
  Super Stainless

The Franklin 4-inch Super Stainless motor has been the driving force behind residential and light commercial submersible pumps for decades. Designed and patented in 1950 by our founder, Ed Schaefer, this motor has proven to be the industry’s most trusted residential pump motor.

Franklin offers 4-inch motors in a full line of single- and three-phase voltages, frequencies, and application-specific models. Wherever there is an independent source of clean groundwater, you can find a Franklin motor. Typical applications that rely on our motors include:

 
 
 
 
  • Homes
  • Farms
  • Restaurants
  • Schools
  • Small Factories
  • Coalbed Methane Recovery
  • Car Washes
  • Fountains
 
     
  Applications
These motors are built for dependable operation in 4” diameter or larger water wells.
 
     
  Features:  
 
  • Corrosion-resistant stainless steel exterior
  • Stainless steel splined shaft
  • Hermetically-sealed windings
  • StatorShield™ resin system
  • Filter check valve
  • Water lubrication
  • Kingsbury-type thrust bearing
  • Pressure-equalizing diaphragm
  • Built-in lightning arrestors (All single-phase; 200 & 300 V three-phase)
  • Removable Water Bloc™ lead
  • Franklin-manufactured control boxes available for single-phase motors
  • UL 778 recognized (North American voltages)
  • CSA certified
  • ANSI/NSF 61 certified
  • Industry standard NEMA mounting dimensions
 
     
  Special Options:  
 
  • 316 SS Construction
    Special constuction option for corrosive applications, including acids, low pH and seawater.
  • Sand Fighter Contruction
    Special contruction option for sandy water wells. Motors include Sand Fighter sealing system with silicon carbide mechanical shaft seal and are warranted against sand entry failure.
  • Coalbed Methane Contructions
    Special contruction option for coalbed methane wells. Includes Sand Fighter sealing system, reinforced diaphragm housing to resist damage from bottom tangging and protective filter to shield diaphragm from debris.
  • Oil Stripper Contruction
    Special contruction option for secondary oil recovery wells where there is a mixture of oil and water. They are also suitable for geothermal and other water well applications where high temperatures and/or high pH conditions exist. Three-phase Oil Stripper motors are equipped with Subtrol heat sensor for use with SubMonitor protection devices.
  • Series 600M (3-5 hp only)
    Heavy Duty Corrosion resistant contruction for more demanding applications, such as fountains Series 600M includes mechanical seal.
 
     
  Constant Pressure Options  
 
  • Use Franklin’s MonoDrive controller with 1 1/2 hp three-wire single-phase motors to provide constant water pressure.
  • Three-phase motors can be used with SubDrive controllers to provide constant water pressure.
 
     
  4-Inch High Thrust Construction Materials  
 
Contruction Type
Top Casting
303 SS
303
303 SS Cast
Bottom Castings
303 SS Over Iron, Painted Cast Iron
303 SS Over Iron, Painted Cast Iron
303 SS Over Iron, Painted Cast Iron
Stator Sheel
301 SS
301 SS
301 SS

Sheel Ends

Low Carbon Steel

Low Carbon Steel

Low Carbon Steel

Shaft Extension
17-4 SS
17-4 SS
17-4 SS
Fasteners
300 Series SS
300 Series SS
300 Series SS

Seal Cover

Acetal

Sintered Bronze

Sintered Bronze

Diaphragm
Nitrile Rubber
Nitrile Rubber
Nitrile Rubber
Diaphragm Cup
316 SS
316 SS
316 SS
Diaphragm Spring
316 SS
316 SS
316 SS
Diaphragm Cover
Gray Iron
Gray Iron
304 SS
Slinger
Nitrile Rubber
Nitrile Rubber
Nitrile Rubber
Lead Wire (or Cable)
XLPE
XLPE
XLPE
Lead Potting
Epoxy
Epoxy
Epoxy
Lead Screws / Clamp
316 SS
316 SS
316 SS
Filter
Delrin & Polyester
Delrin & Polyester
Delrin & Polyester