F.B.’s 8’’ rewindable motors are studied for long-term operation in wells with diameters of 8” or greater. Water-lubricated axial and radial bearings ensure a long service life and maintenance-free operation. The motors are pre-filled with a special antifreeze fluid so that they can be stored down to -59°F. A special membrane compensates the pressure inside the motor. BRONZE-ALUMINIUM, AISI 316, DUPLEX, AISI 904L and SUPER DUPLEX motors are available for applications in aggressive water.

Product Advantages

• Industry-leading efficiency with low operating costs.
• Sand protection: the sand-guard and silicon-carbide SIC-SIC mechanical seal protect against sand during operation.
• The cast iron motor support has been treated with cataphoresis to prevent corrosion (STANDARD version).
• The “Michell” bi-directional thrust bearing made of a resin and graphite compound can withstand up to 70.000N.
• The rotors are balanced and ground along the whole axis.
• The stators are generously dimensioned.
• The windings are made by hand.
• Disassembly and maintenance is exceptionally simple.
• The power cable complies with drinking water regulations.
• The motors are pre-filled with clear water and propylene glycol.
• Ready for installation of a PT100 sensor.