new pump desgn

[zesaint]

Hello everybody,
I am new at this forum (first message) and i hope somebody can help me with this. I have two questions:
1-I need to find a new pump for gas analysis (air), after finding my pressure drop how do i find the right pump, the manufacturers only give the flow in function of the vacuum pressure.
2- Do u know any manufacturer who sell small brusheless pumps (flow rate around 5 lpm), another than Rietschle Thomas for example?

I really apreciate any answer

Thanks

 

[Torricelli]

KNF is an other one for gas analysis / gas sampling.

http://www.vacuum-guide.com/firmenlisten/produkte/sampling_pump.htm