How to Choose Between Centrifugal and Positive Displacement Sanitary Pumps If you are hanging like a pendulum to decide between which sanitary pumps types to use such as positive displacement or centrifugal, it can never be a clear decision. The right thing would be to make smarter choice and it can be brought with clear understanding of its operations: Pressure Vs flow rate The Positive Displacement sanitary pump comes with continuous flow, no matter what the pressure is, where as centrifugal sanitary pump operates with varied levels of flow, highly depending on pressure levels.
In-let and out-let With viscosity going higher, the centrifugal pump loses its flow readily, whereas the flow increases in case of Positive displacement pump. When it comes down to choosing between efficiency and viscosity, the most important role is of viscosity in assuring efficiency of pump. There can be minor effects on the sanitary pump, but least of it comes down to centrifugal. The fluid moves around by bringing certain amount of pushing into the discharge pipe. There are many types of specifications in sanitary pumps such as piston, twin screw, progressive cavity diaphragm, rotary lobe, to give varied amount of flow and pressure at a given speed.