An experimental investigation into the detection of internal leakage of gases through valves by vibration analysis

Thompson, Graham; Zolkiewski, George

doi:10.1243/0954408971529674

Cited by 31 publications

(11 citation statements)

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“…A valve is a mechanical device that controls the flow of fluid and pressure within a system or process [1]. There are many types and sizes of valves for different application.…”

Section: A Control Valvementioning

confidence: 99%

Implementation of Acoustic Emission technique in early detection of control valve seat leakage

Shukri

Rosdiazli

2014

2014 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)

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Control valves are important components in control systems, which play a crucial role in ensuring plants run efficiently. The effect of valve failure is not only major production loss but also high maintenance cost. In a plant, a common technique used for valve maintenance is based on the valve condition replacement at fixed time interval. Most of the time the replacement only happens after the valve has obvious failure and during the plant shutdown. Common case of failure in valves is the internal valve seat leakage. The valve leak tightness test is conducted to detect the occurrence of internal leak in valve, however it is costly and time consuming to isolate the valve from the site and dismantling the valve. Significant money can be saved if leak in the valve can be detected early and if the test can be conducted online without having to isolate the equipment from the site. Therefore, this paper aims to study the effectiveness of Acoustic Emission technique in detecting early leakage in control valve on-site with fully closed position. The paper discusses a method based on different types of statistical analysis parameters such as variance, standard deviation, max amplitude on frequency domain analysis of AE signals to distinguish between healthy and unhealthy control valves. A real time AE measurement system is developed and tested. The acquired AE signatures are processed and analyzed using MATLAB.

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“…A valve is a mechanical device that controls the flow of fluid and pressure within a system or process [1]. There are many types and sizes of valves for different application.…”

Section: A Control Valvementioning

confidence: 99%

Implementation of Acoustic Emission technique in early detection of control valve seat leakage

Shukri

Rosdiazli

2014

2014 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)

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“…2a (21). Extensive research work was carried out by (22), which was an extension to previously carried out work, to further investigate the applicability and reliability of vibration analysis technique in determining valve internal leakage. The experimental work was carried out utilizing more sensitive and accurate instruments, accelerometers and frequency analysers, than those utilized in the previous research work in order to reduce some of the uncertainties and improve the reliability of the results.…”

Section: Control Valves and Actuatorsmentioning

confidence: 99%

Process plant condition monitoring and fault diagnosis

Sharif

Grosvenor

1998

Proceedings of the Institution of Mechanical Engineers, Part E:

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The paper reviews current research work in the field of process condition monitoring and fault diagnosis. The review compares and contrasts the applicability and efficiency of different techniques, and concentrates on methods which monitor the main process variables. From the wide range of methods and process variables, temperature, flowrate and liquid level are used here in comparing the limitations and applications of each method. The scope of the paper ranges from basic, well established techniques to the latest reported monitoring strategies for each of the process variables.Furthermore, the different methods of fault diagnosis deemed to be relevant in process plant are reviewed. The detection of the internal leakage in the control valves and motor faults are discussed in detail, as examples of the monitoring of vital process plant components.The paper then outlines areas of future work, such as the development of a user friendly interface. This interface is based on state transition diagrams (STDs) as well as on the use of a knowledge based system (KBS) to model and diagnose faults in vital process plant components such as control valves.

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“…In the last decades, the applications of AE technique in nondestructive detection of valves were developed greatly. The AE signals introduced by leakage of valves belong to high frequency waves, and it cannot be easily interfered by the ambient noise [6]. The AE technique also can detect the leakage without disassembling valves [7].…”

Section: Introductionmentioning

confidence: 99%

Nondestructive Detection of Valves Using Acoustic Emission Technique

Jin

Heng-hu

Hong

et al. 2015

Advances in Materials Science and Engineering

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The applications of acoustic emission (AE) technique in detection of valves are presented in this review, and the theoretical models and experimental results of nondestructive detection of valves using AE are provided. The generation of AE signals and the basic composition of AE detection system are briefly explained. The applications of AE technique in valves are focused on condition monitoring, failure, cavitation detection, and the development of portable measuring devices. All results prove that the AE technique works well in the detection of valves.

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An experimental investigation into the detection of internal leakage of gases through valves by vibration analysis

Cited by 31 publications

References 1 publication

Implementation of Acoustic Emission technique in early detection of control valve seat leakage

Implementation of Acoustic Emission technique in early detection of control valve seat leakage

Process plant condition monitoring and fault diagnosis

Nondestructive Detection of Valves Using Acoustic Emission Technique

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