DATA ANALYSIS
Upon test completion, we make our initial conclusions, including result classification and leak sizing. Data is anaylzed for it's impact on plant efficiency.
Result Classification
| Testing results are classified as follows: |
(L) Leaking
Conclusions based on analysis of that valve’s signatures alone. |
(L2) Leaking
Conclusions based on secondary information such as the existence of cross-talk. |
(NT) No Test
Test attempted, but results inconclusive due to mechanical defects or operational problems. |
(T) Tight
Conclusions based on analysis of that valve’s signatures alone. |
(T2) Tight
See (L2) above. |
(NA) Not Attempted
Test deliberately deleted, due to low importance or time constraints. |
Leak Sizing
Once a valve is determined to be leaking, the next critical step is to determine the size, or severity, of the leak. In practice, it is very rare that all the valves leaking are repaired because of the usual time and budget limitations. The assessment of the severity allows an informed decision on which valves to repair.
We estimate the damage severity on the basis of the differences between pressure and background signatures. Comparisons are made in decibels at the dominant frequencies of the signatures.
(LRG) - Large: Indicates that the soft metal is being attacked. Body damage is likely. Seats and plugs may be cut deeply.
(MED) - Medium: Indicates damage to the hard metal only. Lapping is the most likely repair required.
(SML) – Small: The leak leaves no visible damage in valves, but grows larger quickly in traps.
Thermal Loss Analysis
The goal of The Cycle Isolation Leak Testing service is to repair the smallest number of items possible for maximum efficiency gain.
Collected field data, including leak size, is entered to determine the real impact on heat rate / output losses. We provide a ranked order by loss contribution for each item. Items are ranked in repair order based on efficiency impact.
 
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