Paper Title:
Evaluation of Internal Leak in Valve Using Acoustic Emission Method
  Abstract

This study is to estimate the feasibility of acoustic emission(AE) method for the internal leak from the valves. In this study, two types of valve(a 4 inch glove steam valve and 4 inch ball water valve) leak tests using three different leak path and various leak rates were performed in order to analyze AE properties when leaks arise in valve seat. As a result of leak test for specimens simulated valve seat, we conformed that leak sound amplitude increased in proportion to the increase of leak rate, and leak rates were plotted versus peak acoustic amplitudes recorded within those two narrow frequency bands on each spectrum plot. The resulting plots of leak rate versus peak AE amplitude were the primary basis for determining the feasibility of quantifying leak acoustically. The large amount of data attained also allowed a favorable investigation of the effects of different leak paths, leak rates, pressure differentials and AE sensors on the AE amplitude spectrum. From the experimental results, it was suggested that the AE method for monitoring of leak was feasible.

  Info
Periodical
Key Engineering Materials (Volumes 326-328)
Edited by
Soon-Bok Lee and Yun-Jae Kim
Pages
661-664
DOI
10.4028/www.scientific.net/KEM.326-328.661
Citation
S. G. Lee, J. H. Park, K. B. Yoo, S. K. Lee, S. Y. Hong, "Evaluation of Internal Leak in Valve Using Acoustic Emission Method", Key Engineering Materials, Vols. 326-328, pp. 661-664, 2006
Online since
December 2006
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Price
$32.00
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