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COMPARISON BETWEEN ACOUSTIC METHOD AND OTHER METHODS


Vanne Rockwell / Rockwell Valve
CRITERIAS MMC’S METHOD
(ValveAlyzer)
INFRARED SPOTS INFRARED CAMERAS SIMPLE ULTRASONICS
Identify Leaking Valves? YES YES YES YES
Ranks leakages and repairs by system impact? YES NO NO NO
Allows adjusting steam traps? YES NO NO NO
Functions at greater than 40kHz? YES N/A N/A NO
Contains a database? YES NO NO NO
Direct comparison of the curves? YES NO NO NO
On-board history? YES NO NO NO
Allows masking background noise? YES N/A N/A NO
Subject to inaccuracies due to a strong background noise? NO N/A N/A YES
Assumes all hot valves are leaking? NO YES YES NO
Subject to inaccuracies due to the state of valves surface (e.g. stainless steel)? NO YES YES NO


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