EN 60534-9 : 2007

FOREWORD
1 Scope and object
2 Normative references
3 Terms and definitions
4 Symbols
5 General test procedures
  5.1 Test valve conditions
  5.2 Test system
  5.3 Measuring instruments
  5.4 Process variable
  5.5 Nominal test position
6 Examples of step response
7 Tests specified for each of three test
  environments
  7.1 Bench tests
  7.2 Laboratory tests
  7.3 In-process tests
8 Detailed test procedures
  8.1 Baseline test
  8.2 Small-step test
  8.3 Response-time tests
9 Presentation of test results
  9.1 General information
  9.2 Test results
      9.2.1 Baseline test
      9.2.2 Small-step test
      9.2.3 Response-time tests
Annex A (informative) - Sliding friction measurement
Annex ZA (normative) - Normative references to
      international publications with their
      corresponding European publications
Bibliography

It defines the testing and reporting of the step response of control valves that are used in throttling closed-loop control applications. A control valve consists of the complete, ready-to-use assembly of the control valve body, the actuator, and any required accessories.