What is a Peripheral Pump?
Peripheral pumps has an impeller which has a large amount small, radial double-flow vanes arranged as its periphery. This impeller then rotates in a large concentric casing channel with an outlet and inlet opening. As the fluid circulates repeatedly between the impeller and the casing channel the energy transferred to it is extremely high.
The fluid transfers along the circumference, from the inlet to the outlet of the casing increasing the pressure. Between the outlet is an arrange stripper. The inlet then prevents a hydraulic short circuit between the high-pressure and the low pressure side of the casing channel.
Peripheral pumps are often designed as close-coupled pumps. This is because of the large increase in energy, they can be small in size.