Pump Coupling

A pump coupling is the element used to connect the rotating pump shaft to the drive shaft of the motor; enabling the motor to efficiently transmit power to the pump.

When a pump is close coupled, a separate coupling is not required as the motor is directly mounted to the pump on a single shaft. Whilst close coupled pumps benefit from a compact, cost effective design, they are less preferable for heavy duty, high power, continuous use as there is more strain put on the common bearings and the size of the motor is usually limited.

For heavier duty applications, long coupled pumps are more suited. As the pump and motor are mounted on their own shafts separated by a coupling, the separate bearings share the strain of operation, therefore extending the lifespan of the mechanical parts.