With the ever-increasing demand in turbomachinery applications of couplings that connect various pieces of equipment, greater performance is required of them. Traditionally, gear couplings were used in these applications but required constant lubrication to extend their life. They would eventually wear out and need replacement. For many years, new turbomachinery applications have been using metallic flexible element couplings which are designed for infinite life and have much lower maintenance requirements.
Metallic flexible element couplings are of two basic types: disc and diaphragm. Each of these can be further separated into different styles – disc and diaphragm couplings. Both of these can be used for a wide variety of applications, including axial compressors, centrifugal compressors, diesel engines, induction motors, synchronous motors, expanders, gas turbines, steam turbines, generators, pumps, blowers, and more.
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