ISA 75.07 : 1997

1 Scope
2 Purpose
3 Test system
  3.1 Throttling valves
  3.2 Test specimen
  3.3 Test section piping
  3.4 Pressure taps
  3.5 Acoustic environment
  3.6 Instrumentation
4 Testing procedures
  4.1 Fluid
  4.2 Microphone position
  4.3 Optional tests
  4.4 Blowdown test limitation
5 Test data
Annex A - References

ISA-75.07-1997, Laboratory Measurement of Aerodynamic Noise Generated by Control Valves, defines equipment, methods and procedures for measuring aerodynamic noise generated by control valves and their associated piping when compressible fluids flow through them. It specifies test system components, including throttling valves, test specimens, piping requirements, pressure taps, acoustic environment controls and instrumentation standards. The preferred test fluid is dry air, with microphone placement guidance provided to accurately measure noise levels. The standard outlines testing procedures, optional tests and limitations on blowdown tests to simulate steady-state conditions. It also details the minimum data required for reporting test results, such as pressures, temperatures, flow rates, valve travel, acoustic data across specified frequency ranges and descriptions of the test setup. References to related ANSI and ISA standards are included for further guidance.