In-line pump is a centrifugal pump with air-cooled motor, the suction and discharge ports of which are located on the same line.
The pump impeller is mounted on the motor shaft, which allows to reduce the overall dimensions and minimize losses due to friction in bearings, typical for cantilever pump designs. The motor air cooling is provided by the impeller located on the end of the shaft opposite to the impeller, and covered with a protective grille.
In-line pumps have a universal design and are suitable for transferring clean liquids without solid inclusions, non-aggressive to the materials of the flow part, and having properties close to water.
In dry rotor pumps, they are used in heating systems when the use of wet rotor pumps is not feasible or when a pressure of more than 15 meters water column or a flow rate exceeding 100 cubic meters per hour is required. They are usually used in high-power boiler rooms, heat points, and in water heating networks at heat distribution stations.
In water supply systems, dry rotor pumps are used to increase water pressure in booster pumping stations and fire fighting stations.