Choosing the right coupling will lead to a reliable and high-efficiency pump, and in addition, repair costs will be reduced. To select the most suitable coupling, the pump, tips on pump operation and maintenance should be considered. Some key considerations in this regard are: – Engine power and operating speed: These two factors are needed to calculate the torque to ensure that the maximum torque and maximum speed per minute are appropriate. Of course, these values will be different for different manufacturers and depending on the type of coupling. Operating temperature: The minimum and maximum operating temperatures are determined according to the type of couplings. However, in some cases, the thermal expansion and contraction of the components to be coupled must also be taken into account in determining the operating temperature. Spatial constraints: Different couplings have different acceptable DBSEs (distance between two ends of the shaft) and the most beneficial distance depends on the design of the pumping equipment. Requirements due to misalignment and axial path: The degree of tolerance of misalignment in different types of couplings is different, but if this axial misalignment is high, the coupling will suffer premature failure. Other key factors to consider when choosing a coupling include: – Shaft and groove size – Exposure to chemicals – Operation cycle (continuous or discontinuous operation) – Torque uniformity
