There are many types of flexible couplings available on the market. Each has its own features and benefits, but all are required to perform a few primary functions: connect two shafts, transmit rotary power and compensate for some shaft misalignment. Elastic couplings are integrally formed metal elastomers, usually cut from metal round rods. Commonly used materials include aluminum alloy, stainless steel, and engineering plastics, which are suitable for various deviations and precise torque transmission.

The flexible diaphragm coupling is a kind of high-performance metal flexible coupling, which compensates axial and angular displacements by the deformation of elastic diaphragm while transferring torque, flexible diaphragm coupling features with compact structure, large transmission torque, long service life, maintenance-free, high temperature resistance, acid and alkali resistance, and corrosion resistance, suitable for shafting transmission in high temperature, high speed and corrosive environment.

The flexible diaphragm coupling utilize a single or a series of plates or diaphragms for the flexible members, flexible diaphragm coupling transmits torque from the outside diameter of a flexible plate to the inside diameter, across the spool or spacer piece, and then from inside to outside diameter. The deflection of the outer diameter relative to the inner diameter is what occurs when the diaphragm is subject to misalignment.