4" Submersible Motors

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 submersible pump motor.

Franklin offers 4 inch motors in a full line of sinlge 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 application that rely on our motors include:

• Home
• Farms
• Restaurants
• Schools
• Small Factories
• Coalbed Methane Recovery
• Car Washes
• Fountains

4" Super Stainless Submersible Motors

• Single Phase:
  • 2 Wire - 0.37 to 1.1 kw
  • 3 Wire - 0.75 to 2.2 kw
    • 230V, 50 Hz
• Three Phase:
• 0.37 to 2.2 kw
  • 380 - 415V, 50 Hz

Applications

These motors are built for dependable operation in 4" diameter or larger water wells. Temperature and time rating continuous in 30°C (86°F) water at 7.6cm/sec (1/4 ft/sec) flow past motor. Rotation: single phase, CCW facing shaft end; three phase, electrically reversible.

For further information, refer to Franklin electric's "Submersible Motors: Application, Installation, Maintenance Manual."

Features

• Corrosion-Resistant Construction
• Stainless Steel Splined Shaft
• Hermetically-Sealed Windings
• Anti-Track Self-Healing Resin System
• Water Lubrication
• Filter Check Valve (Water Well)
• Kingsbury-type Thrust Bearing
• Pressure Equalizing Diaphragm
• Sand Fighter Slinger
• Built-In Lightning Arrestors (single-phase)
• Removable "Water-Bloc" Lead Installed
• NEMA Mounting Dimensions

Special Features

• 316 Stainless Steel: Special construction option for acid, low pH, and seawater applications.
• Two-wire motors are split phase designs with integral starting components and on-winding thermal overload protection, so they do not require a control box. They feature Franklin's patented 2-wire BIAC starting system which provides automatic torque reversal to aid starting in adverse environments.

Control Boxes

• 1ph, 230V, 3 Wire
• Franklin's single phase submersible Control Boxes are suitable for outdoor mounting IP23
• Start and run winding overloads protect the motor from failure due to abnormal operating conditions.

Availability

Single Phase

Capacitor start, capacitor run (Control Box Required). Franklin Electric Control Box required for warranty cover.

Construction Materials

2-Wire, Split Phase, 50 Hz, 2875 RPM

3-Wire, Capacitor Start, 50 Hz, 2875 RPM (Franklin Electric Control Box required for warranty cover)

3-Phase, 50 Hz, 2875 RPM

Single Phase products comply with IEC/CSIPR14