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.
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.