EN 12723:2000

Foreword
1 Scope
2 Normative references
3 General terms and definitions for pumps and installations
  3.1 List of symbols and quantities
  3.2 List of letters, figures and symbols used as subscripts
  3.3 General definitions
  3.4 Rates of flow
  3.5 Heights
  3.6 Heads
  3.7 Specific energy
  3.8 Cross-sectional areas
  3.9 Velocities
  3.10 Pressure
  3.11 Temperatures
  3.12 Powers
  3.13 Efficiencies
  3.14 Performance
  3.15 Speed and rotation
  3.16 Forces and loads
  3.17 Pumped liquid characteristics
  3.18 Miscellaneous terms
4 Special terms for rotodynamic pumps
  4.1 Rates of flow
  4.2 Heights
  4.3 Power
  4.4 Heads
  4.5 Cross-sectional areas
  4.6 Velocities
  4.7 Speed and rotation
  4.8 Performance
  4.9 Pump characterizing number
  4.10 Miscellaneous terms
5 Special terms for reciprocating and rotary positive
  displacement pumps
  5.1 Rates of flow
  5.2 Cross-sectional areas
  5.3 Velocities
  5.4 Pressure
  5.5 Volumes
  5.6 Forces and loads
  5.7 Efficiencies
  5.8 Miscellaneous terms
Annex A (informative) Figures for illustrating the
        definitions

This European 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. The standard identifies the units in common usage but all further legal units may be used. A definition of a liquid pump is included. This standard deals solely with conditions described by positive values for the rate of flow and pump h head.