Sealing technology for centrifugal pumps
The rotor blade that is required in centrifugal pumps to produce centrifugal power is a neuralgic point of leakage. To reliably secure centrifugal pumps, Freudenberg Process Seals therefore offers a sealing program perfectly designed for the system, function and application, from the Simmerring® to the spiral wound gasket.
In a centrifugal pump, the centrifugal force is used to convey liquids. The medium enters the pump through the suction pipe, is carried along by a rotating impeller and is forced outwards into a circular path. The energy of the liquid that is absorbed when this happens, increases the pressure within the pump and presses the medium into the pressure pipe.
A distinction can be made between two types of flow in centrifugal pumps: The radial flow at right angles to the axis of the drive and the axial flow in the direction of the drive axis. Because of the simple and robust construction, this type of pump is widely used in one or two stage design. Another advantage is the continuous pulsation-free way that it works.
This is why centrifugal pumps are used in a wide range of applications in the processing industry - from the chemical industry, where top performance or high pressures are used, to ultra-pure areas with ultra-pure water, foods, beverages, cosmetics or pharmaceuticals - all of which Freudenberg Process Seals have the right sealing solutions available for.
A key feature to ensure that centrifugal pumps work safely is for the rotary shaft to be tightly sealed. The seal to the pump chamber is made at low pressures using elastomer or PTFE shaft sealing rings. Mechanical seals are used at higher pressures, or as an alternative, you can use stuffing box packing that has been developed especially by Freudenberg Process Seals.