International Organization for Standardization (ISO)
Status
Latest
ISO 17769:2008
Scope
This International Standard deals with 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 International Standard identifies the units in common usage but, all other legal units can be used.
This International Standard deals solely with conditions described by positive values for the rate of flow and
pump head. The definitions are set out showing first the most common form of a quantity followed by some
frequently used variants. Other variants can be constructed and appropriate symbols evolved using the
symbols and subscripts shown. Prefixes such as "working" and "design" can also be applied to the defined
quantities.
This International Standard 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 31-0 and ISO 1000, with further
explanations where these are deemed appropriate. Some deviations have been incorporated for reasons of
consistency.
ISO 17769:2008 Referenced Document
ISO 1000 SI units and recommendations for the use of their multiples and of certain other units; Amendment 1
ISO 31-0 Quantities and units - Part 0: General principles; Amendment 2
ISO 17769:2008 history
2008ISO 17769:2008 Liquid pumps and installation - General terms - Definitions, quantities, letter symbols and units