This standard prescribes a method of measurement of air flow and free air delivery of positive displacement compressors and exhausters, both reciprocating and rotary types.
1.1 This standard deals with measurement of air flow by using standard flow nozzle in order to obtain consistent and generally acceptable results, within a specified tolerance, from commercial instruments.
IS 10431 Pt.1-1982 history
1983IS 10431 Pt.1-1982 Air flow measurement for compressors and discharge units Part I Nozzles