Prior to selecting positive displacement pumps for a given application a complete and thorough understanding of basic hydraulic principles must be understood to determine the work required by the pumps to accomplish the task at hand. Without this knowledge most pumps will be doomed from conception. Vapor Pressure 3.
Many pumps impart shearing forces which can change the effective viscosity of the fluid.
Kinematic Viscosity 3. Absolute Viscosity 4. Thixotropic c. Dilatant d. Colloidal 5. There are many makes and models of positive displacement pumps each having unique design technologies to contribute to a fluid and process application. Understanding basic pump principles and characteristics will help in determining the most viable positive displacement pump for an application.