It takes a lot of work to generate gas streams that are uniform and reproducible, with no variation. But if your rotary seal leaks, this can introduce moisture and potential corrosion, and you may see a higher OH peak in measured fibers. Common rotary seal designs, where the shaft slips into a housing and seals on the inside diameter of the rubber O-ring, typically wear quickly. This, of course, impacts the quality of the seal and may force frequent rebuilds to prevent contamination. A better solution is available. The rotary seal by SG Controls seals with the O-ring side against an adjustable glass pressure plate. In this design, there is extremely low wear on the O-ring. This is a reliable rotary seal that works with both types of gas delivery systems. Over the years, I have seen no corrosion issues and minimal leakage issues with this type of rotary seal.
Additional resources from the FOC team include:
- Category Resource FOC Fiber Design and Manufacturing Page
- Glossary, Acronyms, Military Specifications for Connectors: http://bit.ly/2a2EFn8
- Q&A Resource: email technical questions to AskFOC@focenter.com
Have questions about this FOC Tip?
Contact FOC with questions at: (800) 473-4237 / 508-992-6464 or email: FiberOpticCenter@focenter.com and we will respond ASAP.
Additional articles from our preform fabrication consultant include:
- MCVD Tips: 14 ideas to enhance preform strength, yield, and reproducibility
- MCVD Options: These add-on features can enhance your optical fiber preform strength, yield, and reproducibility
- Controlling the optical fiber preform deposition process
- Preparing to Manufacture an Optical Fiber Preform
- Critical Design Goals to Manufacture Optical Fiber Preforms
- Comparing the 2 types of MCVD gas delivery systems to manufacture optical preforms: Stainless steel and Teflon/glass
- Attention specialty fiber manufacturers: Take advantage of FOC’s preform fabrication consulting to troubleshoot your system and achieve reproducibility and high yields