Multimedia library

Multimedia about PROGNOST Systems

Video tutorial for valve monitoring of reciprocating compressors

2020-06-05T10:35:13+02:0017. May 2019|General, Intelligent Machine Monitoring, Multimedia library, News|

When watching this tutorial we will learn more about valve monitoring of reciprocating compressors. Jonas is showing us the main differences of the two monitoring techniques for valve monitoring. The first technique is cylinder vibration and the other one is dynamic pressure measurement. Jonas is explaining us on basis of a graph how it is done by using and combining these techniques. See how the signals are changing during the compression cycle from suction to dischargeUnderstand how the vibration monitoring is showing us the valve actions (closing and opening)Get information about indications for different valve failuresGain knowledge on how information about the process behaving is delivered by the pressure curves and the vibrationLearn why this is required to get a [...]

Sensor locations on Reciprocating Compressors

2020-06-05T10:02:35+02:0018. February 2019|Intelligent Machine Monitoring, Multimedia library, News|

Best practices for sensor mounting to obtain perfect signals for Online Condition Monitoring and Machine Protection of Rotating Equipment. This includes acceleration sensors, velocity sensors for API compressors, displacement and pressure sensors.

Time vs Frequency domain signal analyses

2020-06-05T10:03:18+02:0021. December 2018|Intelligent Machine Monitoring, Multimedia library, News|

What is the relationship between time domain and frequency domain in terms of basic parameters? We will answer this question in the next 18 minutes and provide you some expert advice for vibration analyses. The second part of this episode will focus on the correct rules to capture a fruitful time signal. You will learn how to compare and make correct settings so you should not miss any frequency of interest. https://youtu.be/WgRJGXJxZ9o

Why segmented vibration analyses is superior

2020-06-05T10:38:22+02:0019. December 2018|About PROGNOST Systems, Intelligent Machine Monitoring, Multimedia library, News|

Why radial and piston compressors each require special analyses for vibration monitoring? Because both machine types have very different operating principles. The main difference is that the vibration signature of reciprocating machinery is marked by regular peaks that occur during each revolution. These peaks come from mechanical impacts such as valve opening and closing. That means, for reciprocating compressors reoccurring vibration amplitudes are good. As opposed to rotating machinery, where a flat vibration reading is good and vibration amplitudes are bad. With this basic understanding of vibration origin and signatures, it is obvious that both machines types require dedicated monitoring strategies. For reciprocating compressors, the unique segmentation of vibration monitoring proved to be a reliable way to detect impending failures [...]

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