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Luwa Case Study

Motion amplification technology provides a faster and less expensive alternative to traditional ODS techniques to help locate sources of unwanted movement. The following case study was performed by Cascade for a local Fortune 100 chemical company and took less than an hour to complete, including setup time.


lewa_ods
Over the past 6 months to a year the unit has started having seal failures on E403. Reviewing the data we are seeing the movement increase and decrease at different times indicating there may be potential process issues causing the Luwa to move (Fouling; imbalance). We have also had installation issues with seals. These seals are a component seal design which is not easy to install. We are moving to a cartridge seal design. We have a program going in Houston Area Operations (HAO) to replace component seals at the first available opportunity.

There is an innovative technology that is in development and will go on the public market sometime this fall (2016). The technology is motion amplification from RDI. It is being used in the medical field, on bridges, support wires for radio antennas, soft foot and other areas in rotating equipment and fixed equipment field. Cascade represents the system and was agreeable to bring their system out and test on the E402 and E403 Luwas. After clicking on the embedded files, you will see a video come up. The picture on the left shows what you see with the naked eye. The picture on the right shows what it looks like amplified. In our case we have an amplification of 20 for comparison.


E403 Motion amplification videos:

The first video shows a close up of the seal. Note the movement and the bending of the seal. The second video shows a wider angle of the seal area. Note the movement of the head on the Luwa. It appears the Luwa is moving and the seal is moving a good amount indicating both an installation and process issues. The third video shows a view looking at the piping and notice there is movement in the 12 or 18” line.

Luwa 403 Close Up

Luwa 403 Piping

Luwa 403 Wide View

E402 Motion amplification videos:
The first video shows a close up of the seal. Note no movement in the seal. The second video shows a view looking at the piping and notice there is no movement of the piping. This is a great comparison between E402 and E403.

Luwa 402 Wide View

Luwa 402 Piping

Conclusion:
You can see a good comparison between the two seals E402 and E403 and the associated piping systems . There is definitely an issue on E403 both process wise and seal installation wise. E402 looks fine at this time.


 

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