Pressure dewpoint out of air dryer

[tomato5]

Your assistance is appreciated

the usual specification for dryness of instrument air at dryer exit is a pressure dew point of - 40 F. Take the pressure at this location to be 100 psig.

Question is what variables would need to be adjusted:

first, to give this value - 40 F at 100 psig

second, which to give - 40 F at 115 psig

third, to give - 30 F at 100 psig

If you feel this thread is not within your purview can you please indicate which group might be more involved with this?

Thank you

 

[zdas04]

Look at a psychometric chart, it has water content vs. temperature and pressure for air. The bottom line is that a -40F (or C) dewpoint at 100 psig would have a larger mass of water vapor than the same stream at 115 psig.

David Simpson, PE
MuleShoe Engineering

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. ùGalileo Galilei, Italian Physicist