Long-coupled pumps are pumps with a flexible coupling that connects the pump and the motor. This kind of coupling is available either as a basic coupling or as a spacer coupling. If the pump is connected to the motor by a basic coupling, it is necessary to dismount the motor when the pump needs service. Therefore, it is necessary to align the pump upon mounting.
On the other hand, if the pump is fitted with a spacer coupling, it is possible to service the pump without dismounting the motor. Alignment is thus not an issue.
Long-coupled pump with spacer coupling
Close-coupled pumps can be constructed in the following two ways: Either the pump has the impeller mounted directly on the extended motor shaft or the pump has a standard motor and a rigid or a spacer coupling.
Different coupling types
Long-coupled pump with flexible coupling
Close-coupled pump with rigid coupling
