TS EN ISO 17769-1

TS EN ISO 17769-1 is the first part of a standard on general terms, definitions, quantities, letter symbols and units for liquid pumps and associated installations. Its technical focus is the common language used for flow through rotodynamic and positive displacement liquid pumps, especially the core expressions for flow rate and pump head.

A shared language for pump engineering

In pump engineering, the same physical quantity may be described differently across design, manufacturing, operation and plant construction. This standard addresses that problem by providing a common terminology framework for communication between the installation designer, manufacturer, operator and plant constructor. In general technical terms, flow rate describes how much liquid is conveyed per unit time, while pump head expresses the energy added to the liquid. Using consistent symbols and units helps reduce ambiguity in drawings, specifications and technical discussions.

What the scope is and is not

Based on the supplied scope, the document is concerned with terminology and symbols for liquid flow rather than with pump selection rules, performance guarantees or operating procedures. It identifies units in common use and also allows additional legal units to be used. It deals solely with conditions described by positive values for flow rate and pump head. In practical terms, this makes it a reference for consistent expression of key pump quantities, not a complete design manual for every aspect of pumping systems.

• Terminology for rotodynamic and positive displacement liquid pumps
• General terms, definitions, quantities and letter symbols for liquid flow
• Common usage of units for flow and head
• Allowance for additional legal units
• Communication support between designer, manufacturer, operator and plant constructor