BS 1571-2:1975

Co-operating organizations
Foreword
Specification
1 Scope
2 References
3 Definitions
4 Units and symbols
5 Measuring equipment and methods
6 Arrangement of tests
7 Test procedure
8 Test report
9 Measurement of air flow using a nozzle in the
    pipeline
Tables
1 Capacity and specific energy consumption tolerances
    for simplified test
2 Details of perforated plate
3 Dimensions of nozzles
4 Rounded nozzle: nozzle constants and volume flow
5 Rounded nozzle: tolerances on inlet volume
Figures
1 Diagrammatic arrangement of test layout for
    reciprocating compressor
2 Diagrammatic arrangement of test layout for
    reciprocating exhauster
3 Diagrammatic arrangement of test layout for rotary
    compressor
4 Diagrammatic arrangement of test layout for rotary
    exhauster
5 Arrangement for testing with a nozzle on the
    delivery side
5a Perforated plate for 25.4 mm (1 in) nozzle
6 Arrangement for testing with a nozzle on the intake
7 Nozzles 25.4 mm and larger
8 15.88 mm (5/8 in) nozzle
9 9.53 mm (3/8 in) nozzle
10 5.56 mm (7/32 in) nozzle

Simplified testing of reciprocating and rotary types including permissible deviations. Pressure and temperature measurements and arrangement of tests. Form of test report and gives adjustment of test results to guarantee conditions.

1.1 General. This standard specifies acceptance tests for positive displacement air compressors and exhausters, the absolute intake pressures of which exceed approximately 1 mbar¹⁾. In establishing the scope of this standard a positive displacement compressor is considered as a machine where a static pressure rise is obtained by allowing successive volumes of air to be aspired into and exhausted out of an enclosed space by means of the displacement of a moving member. The standard applies to such machines as reciprocating and rotary compressors.