TS EN ISO 17769-1

TS EN ISO 17769-1 is a vocabulary standard for liquid pumps and associated installations, defining the general terms, definitions, quantities, letter symbols and units used in this field. Its focus is the way flow through rotodynamic and positive displacement liquid pumps is named and communicated in technical practice.

Building a common technical language

Pump systems rely on consistent communication between designers, manufacturers, operators and plant constructors. This standard helps align the core language around quantities such as flow rate and pump head so that performance data, operating conditions and technical documentation can be interpreted more consistently across different parties.

In general technical terms, rotodynamic pumps transfer energy to the liquid through a rotating impeller, while positive displacement pumps move the liquid by trapping and displacing a defined volume. Although both are liquid pumps, they behave differently in service, especially in relation to flow pattern, pressure generation and operating characteristics. A controlled vocabulary is important because these distinctions affect specification, selection and system understanding.

Scope boundaries and units

• The standard covers terms and letter symbols for liquid pumps and associated installations.
• It deals solely with conditions described by positive values for flow rate and pump head.
• It identifies units in common use, while allowing additional legal units to be used as well.
• The subject is liquid pumps, not vacuum pumps.