MEMBRANE DRYER ASSEMBLY Parker Balston membrane dryer rated for +35 F dew point and a max flow of 15 cfm based on 100 psi at the inlet. Comes with 3 stages of filters rated for 99.99% at .01 micron.1/2IN port size. 40/120 F min/max ambient air temp. 60/150 psi min/max pressure.