Recent content by nbaggs

Sorry to bring up an old post, but I was thinking about this the other night and came up with a theory. These are glass and molybdenum disulphide filled PTFE material piston rings in a hydrogen application (specific gravity is approx. 0.07). Suction pressure is approx. 740, discharge pressure...

Reciprocating gas compressors, mostly used for upstream, midstream, and downstream natural gas applications, as well as some processing and CNG applications.It is a pretty interesting place for an internship.

I did bring these questions up to one of our design guys. Turns out the piston ring gaps really were too small. The material is proprietary to the company we purchase them from, but they are a compression molded glass and molybdenum disulphide filled PTFE material. There was a different CTE than...

Okay, I think I figured out what they did. With a little bit of algebra, you can turn ΔL=αΔTL into End Gap=L2(1-1/(αΔT+1)) Then, if you assume a ΔT of 150°F and a L2 of 8.495 (DIAMETER of the piston, not the bore) you get within .004" of our end gap low tolerance. But, that's...

We don't have tooling to accurately measure the piston rings. We machine the cylinders ourselves but we purchase the piston rings from another manufacturer. I'm taking dimensions off of our drawings. One thing I didn't take into account is the thermal expansion of the cylinder, but that's...

Im an intern at a manufacturing company looking at whether our end gaps are too small on piston rings. Can someone take a look at this and tell me if I'm doing it right? We have a piston ring that goes into a 9 5/8" bore. The upper limit of the end gap is 0.136. Max temperature is 300°F. For...

I'm an ex-navy nuke currently back in school and trying to get into a mechanical engineering program. I want to go into engineering because while I was in the navy I worked side by side with a lot of civilian engineers and it seemed like they enjoyed their work. It also didn't seem like...

This might be a dumb comment, but wouldn't feeding steam generators cool down your primary system too quickly? A rapid drop in pressurizer level is never something you want to see, and charging would only cool down your primary even quicker. I think this would mean that whatever water you have...

What about graphite packing? run it in properly and it should easily hold to 20-30 feet. I would test it before expecting it to go to 90 feet though.