Identification should include
- performing a visual inspection for any external control valve leaks
- performing an operational test of the control valves to identify internal valve leakage problems
- repairing or replacing, as necessary.
ASE 2: VIII. Hydraulics: E. Control Valves
Process/Skill Questions:
- What is the major cause of internal control valve leakage?
- Why are most control valves removed and replaced by using factory remanufactured valves?