Condition
Aboard ship or in workshop, given one of the following types of valves: safety valve, steam trap, quick closing valve, drain valve or relief valve, and other equipment needed to complete the task.
Performance requirement
| Behavior | Standard |
|---|---|
| The student will: | During assessment, the student shall, at a minimum: |
|
Disassemble a globe valve |
Remove old packing from stuffing box |
|
Inspect valve |
Examine disk and seat Blue-in valve disk and seat |
|
Repair valve as necessary |
Machine, grind-in and bed-in valve disk and seat as required Replace bonnet gasket Select and install new packing Take up on valve stuffing box gland |
|
Reassemble valve |
Prove valve leak free with hydrostatic test |
Location
Assessed in EN‑1211 Auxiliary Machinery I.
References
STCW Knowledge, Understanding and Proficiency
NVIC Tasks
- NVIC 07-14 Task 1.2.E Take up on a gate/globe valve stuffing-box gland
- NVIC 17-14 Task 8.2.C Repack a valve
- NVIC 18-14 Task 5.1.C Operation and repair of valves
See the Assessment Guidelines for additional specifications of behavior and standards.