Radial Flow Pump
The radial flow pump is a centrifugal pump in which the liquid exits the pump radial, ie perpendicular to the pump shaft. Today, the radial flow pump is CP’s standard working principle and is obligatory in most applications.
A centrifugal pump is a rotodynamic pump that uses a rotating impeller to increase the pressure of a fluid. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute casing, from where it exits into the downstream piping system. In contrast to Axial pumps, in which the liquid exits the pump axial, the flow deflections in the impellers of radial flow pumps realize higher centrifugal forces. This leads to higher pump heads in radial flow pumps, but also to smaller capacity flows.
Centrifugal pumps work by converting kinetic energy into potential energy measurable as static fluid pressure at the discharge flange of the pump. This action is described by Bernoulli's principle. With the mechanical action of an electric motor or similar, the rotation of the pump impeller imparts kinetic energy to the fluid through centrifugal force. The fluid is drawn from the suction flange into the impeller intake eye and is accelerated outwards through the impeller vanes to the volute and discharge flange. As the fluid exits the impeller, if the outlet piping is too high to allow flow, the fluid kinetic energy is converted into static pressure. If the outlet piping is open at a lower level, the fluid will be released at greater speed.
CP’s Radial Flow Pumps
CP’s magnetic coupled, double mechanical sealed and canned motor Radial Flow pumps are particularly recommended for medium capacities (Q up to 600 m³/h) and high delivery heads (H up to 120 m). The pumped liquid and the operating conditions determine the selection of the materials and the type of the sealing. The casing material ranges from high-alloyed stainless steels, nickel and nickel basis alloys to various high-quality plastics or even to ceramic. Today, many modern pumps are made without a shaft seal: either, the diving torque is merely transmitted with permanent magnetic synchronous couplings (magnetic drives). If shaft seals are required, CP also offers a number of pumps with double mechanical seals alternatively.