MDM Modular Membrane Dryers

MDM series modular membrane compressed air dryers were developed to complement our stable of industry leading refrigeration, adsorption and filtration technologies. Membrane dryers use a bundle of tiny tubular fibers that let fast gases like water vapor permeate through the tube wall to be swept away into the ambient. Our membrane fiber technology features multiple strands to form a continuous microscopic sieve that targets and removes “fast gases” like water molecules as a vapor. Pressure dew points from +50°F to -40°F are achieved by balancing the model size, air pressure and volume (scfm) requirements to the application.


SELECTIVE PERMEATION
Through the process of selective permeation, water vapor is removed while leaving the gas composition intact. Each membrane bundle is comprised of multiple tubular membrane fibers, evenly spaced to provide maximum surface area in a compact design. Each helically wrapped layer alternates direction to ensure consistent cross- sectional density and large flow paths for the sweep air that carries the water vapor to atmosphere. No oxygen is lost, which makes these ideal for medical applications.

SELECTIVE PERMEATION PROCESS

•    Compressed air enters the center of the membrane tubes
•    Water (H2O) vapor diffuses through the membrane wall faster than the other gases
•    A small portion of dry compressed air is swept back across the outside of the membrane walls to evacuate the H2O vapor to atmosphere
•    Dry compressed air exits the unit ready for process applications

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