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Low pressure ratio, high flow compressor (Blower?)

Low pressure ratio, high flow compressor (Blower?)

Low pressure ratio, high flow compressor (Blower?)

(OP)
I am new to the compressor world (and this list) and think I may be looking for something that falls in between many of the standard designs out there.  I need to compress helium from 1 atm to 1.1 atm at a flow rate of 300 l/m.  The gas starts at room temperature and the pressure ratio might need to go up or down a bit.  The system needs to be clean and sealed, and I would like something that has a high thermodynamic efficiency.  At first I thought a centrifugal blower would be the right design, but they tend to move ten times as much gas for the smallest models.  Any suggestions would be appreciated.

    Thanks in advance

RE: Low pressure ratio, high flow compressor (Blower?)

Look at a positive displacement straight blower, commonly called a Roots style.

RE: Low pressure ratio, high flow compressor (Blower?)

at bthose ratios and small voume, don't worry about efficiency, put you money in a unit that has no seals.  A hemetically seal air conditioner type compressor would work.

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