Close Coupled Pumps
What is a close coupled pump?
A type of pump that involves an impeller as the central element of the motor component. The pump doesn’t have a separate coupling, and thus eliminate coupling alignment, one of the more expensive and time-consuming operations of pumps that aren’t close-coupled.
How do they work?
In a close coupled pump, the impeller is on the same shaft as the electric motor that drives the pump. The motor has a machined face on one end, which matches the face on the pump casing that is mounted against the motor face. The bearings that are in the motor must handle the forces generated by the pump, since it doesn’t have its own separate bearing housing.
What applications are they used?
The simplicity, versatility, and relatively low cost of this type of pump make them useful in many industries. They typically are used with relatively simple seals, so they are limited as to temperature and to relatively non corrosive liquids. Because the bearings are located in the motor, close couple pumps are limited in size to about 40-50 hp for most applications.
Price® Pump Company manufactures an extensive line of close coupled pumps for a wide range of applications, including chemical transfer, pressure boosting systems, cooling water treatment, fertilizer injection, and ozone injection. The company has more than a dozen different models to fit specific application needs with flow ranges to 1100 gpm and 300 ft of head. The close coupled pumps are available in many configurations, including horizontal, vertical, self-priming, multi-stage. The pumps are also available in a range of materials of construction including cast iron, bronze, 316 stainless steel and more.
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