The term „standard volume flow“ refers to a unit quantity of a gas based on a standard reference. These standard conditions are used in nozzle technology, process engineering and other areas to compare gases on the basis of quantity information. If reference is made to standard volume flows in relation to nozzle technology, Lechler always bases its values on DIN EN ISO 1343.
In contrast, the term „operating volume flow“ describes the volume of the corresponding gas under the actual operating/application conditions. Since these normally differ from the standard conditions, pressure and temperature must always be clearly defined. If an operating volume is delivered in a certain time, this results in the operating volume flow.