The Sun Star Type “D” motor is a water-filled, high efficiency, submersible motor. All exposed metal components are 316 series stainless steel. The motor is completely sealed and employs an internal pressure balancing system. The mounted flange dimensions ensure a standard fit to most pump manufacturers. The Type “D” motor is designed for “across-the-line” and reduced voltage starting. It is also approved for operation with Variable Frequency Drives (VFD).