For decades, ultrasound has been considered a reliable method for
gas and steam leak detection. Thus, it is widely used for
predictive maintenance of valves and steam traps.
However, it has recently been proved that certain frequent
operating conditions reduce and invalidate reliability of the
traditional ultrasound method for gas and steam leak detection.
Basis of the method. Flow of gas or steam through small
holes or clefts generates ultrasound in the band of 40 kHz.
Normally, steam traps discharge condensate at low speed, and there
is no ultrasound. As soon as steam traps blow, ultrasound is
generated. Therefore, ultrasound presence in steam traps is
associated
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