To best understand what your risks are you need to understand what kind of failure to expect. Typically if your are going to fail both seals at once, it is going to be some kind of major even that causes the issue.
If you have a stable rotor then seal contamination will likely be the number...
David,
Depending on the exact design of the compressor the answer can vary to some extent.
If we assume that the only thing that is changing is the inlet pressure to the compressor, then the compressors capability to compensate will be a function of the wheel/impeller geometry and where it is...
There are many examples of a blower being utilized to boost pressure into a subsequent higher pressure compressor. Whether it is a screw, centrifugal or recip. does not make a difference. What will make a difference is the gas characteristics that you are trying to compress and the robustness of...