C or D Frame adapter

The “C” frame adapter is used to connect and align the pump to the motor. It makes the alignment with registered fits and offers the additional advantage of equalizing temperature between the motor and the pump without forcing all of the thermal conduction to take place through the shaft.

It looks very much like the adapter used to connect the wet end of a centrifugal pump to its power end. All of the dimensions are in inch units. The “D” frame adapter is the metric equivalent.

The “C” frame adapter was originally created for the marine industry that had the problem of trying to align a pump to a driver (motor) knowing that the ship’s hull flexes.

The “C” frame adapter performs the same function as the bell housing in an automobile that aligns the engine to the transmission.



  • On February 14, 2018