scope:

This part of ISO 17769 specifies terms, letter symbols and units related to the flow of liquids through rotodynamic and positive displacement liquid pumps and associated installations. It serves as a means of clarifying communications between the installation designer, manufacturer, operator and plant constructor. This part of ISO 17769 identifies the units in common usage, but all additional legal units can be used. This part of ISO 17769 deals solely with conditions described by positive values for the rate of flow and pump head. This part of ISO 17769 is not concerned with terms, letter symbols and units referring to the component parts of rotodynamic and positive displacement pumps and installations. Whenever possible, symbols and definitions conform to those used in ISO 80000-1, with further explanations where these are deemed appropriate. Some deviations are incorporated for reasons of consistency.