Which type of coupling is often used to protect a pump and motor against slight misalignment?

In mechanical systems, managing alignment between components such as a pump and motor is essential for maintaining performance and preventing premature wear. The use of a flexible coupling is particularly advantageous in accommodating slight misalignments that can occur during operation. Flexible couplings have the ability to absorb vibrations and misalignments while still allowing for the effective transfer of power between the connected shafts.

This adaptability is crucial because it prevents excessive stress on both the motor and pump, which can lead to damage over time. By using a flexible coupling, the system can tolerate variations in alignment without losing functionality or efficiency. Other types of couplings, like rigid couplings, do not provide this ability and would transmit misalignments directly, potentially causing more significant issues.

In essence, a flexible coupling acts as a buffer that helps maintain the integrity of both the motor and pump in dynamic conditions where alignment may fluctuate, making it the preferred choice for protecting these components.