What is Vapor Space Compression and Why Can it be Problematic?
There are many factors to consider for liquid sampling. That's why we put together a five-part Ask Swagelok video series that discusses the importance of maintaining proper vapor space compression, the role of outage tubes, how vapor space is affected by sampling system design, and what you need to know to minimize the risk of cylinder rupture.
In the third video, fluid sampling expert Matt Dixon explains vapor space compression and why it can be problematic.
Video Transcript
LUCAS TREU:
Hi there. I'm Lucas Treu, and this is Ask Swagelok. Today I'm joined by Matt Dixon, one of our fluid sampling experts, and we're talking about liquid sampling and how to do that effectively when you're working with cylinders. So Matt, tell me a little bit about vapor space compression. What is it, and why is it an issue?
MATT DIXON:
Vapor space compression can be a big problem. When you expect the vapor space to be a certain size and it ends up being significantly smaller, you may not have enough room for the liquid to expand. That puts you at risk of rupturing the cylinder.
However, if we know the sampling procedure, the supply pressure, and the return pressure, we can make a good estimate of what the vapor space will be after the sample is captured in the cylinder. And if that vapor space is too small, we can take remedial actions to mitigate any risks.
LUCAS TREU:
Well, thanks. And thank you for joining us for Ask Swagelok.
