# Rotating PD Pumps

FluidFlow contains a database of Rotating Positive Displacement (PD) Pumps which can be used when building a network. The user can also supplement this database by adding new pumps for specific applications. This section of the help file outlines the information required when adding a new PD pump to the database. Firstly, define the main pump parameters by selecting Database | Boosters | Rotating Positive Displacement Pump and clicking the "Add" button. Give your new pump a (unique) Name and enter the main operating parameters for the pump (see Figure 1). Figure 1: Data Entry for a Rotating Positive Displacement Pump.
Rotating PD Pump Data Entry
Name | A descriptive name for this element.
Manufacturer | The name of the pump manufacturer.
Materials | The materials used to manufacture the pump may be defined in this field, e.g., Steel, Stainless Steel, Bronze, etc.
Applications | The specific applications in which the pump may be used, e.g., Chemical, Power, etc.
Max Operating Pressure | If there is a maximum pressure rating for the pump you should enter this value here. Leaving the value at 0 means that FluidFlow will not make an overpressure check.
Pressure Unit | Pressure units used when defining the Max Operating Pressure.
Suction Size | Diameter of the pump suction connection.
Discharge Size | Diameter of the pump discharge connection.
Size Unit | Diameter/size units used in the above entries.
Max Operating Speed | Maximum operating speed of the pump which is available from pump manufacturers.
Efficiency (%) | Pump efficiency which is available from pump manufacturers.
Viscosity Max Limit | Maximum fluid viscosity the pump can effectively and safely transfer.
Viscosity Unit | Viscosity units used in the above entry.
Displacement Vol/Rev | Volumetric quantity of fluid displaced per pump revolution. This information is usually available from pump manufacturers.
Volume Unit | Volume units used in the above entry.
Slip Data | The pump slip capacity which is a function of fluid viscosity. Figure 2 provides an illustration of a typical performance factor curve.
Figure 2: Data Entry for Slip Capacity for a Rotating Positive Displacement Pump. To create the curve-fit, simply enter the coordinates as provided by the manufacturer in the columns on the left hand side. FluidFlow will automatically create the curve-fit once a minimum of three coordinates have been defined.
Curve Fit Data Entry
Curve Fit Type | There is just one choice available: Log Polynomial.
Viscosity Unit | Refers to the viscosity units used in the data entry for the curve.
Slip Capacity Unit | Refers to the slip capacity units used in the data entry for the curve.
If any of the above is unclear or you require any further information, please contact us at: support@fluidflowinfo.com.