The working priciple of Membrane Type Air Dryers With Activated Alumina Ball

The membrane dryer With Activated Alumina Ball operates on the principle of selective permeation through a membrane.

As the compressed air passes through a bundle of tiny hollow (polysulfone) membrane fibers, water vapor and a portion of the compressed air flow diffuses through the semi-permeable membrane walls while the dried air continues downstream.

The water vapor separated from the compressed air equipment with Air Dryer Desiccant by the differential gas pressure on the inside and outside of the hollow fibers is purged out of the housing by the sweep air (purge air).

The membrane dryer can only be used with clean, oil-free air. It must have a coalescing prefilter installed ahead of the dryer to remove any liquid water, oil, and aerosol contaminants from the compressed air stream, as these would block the permeation of the fibers, reducing the performance of the dryer.

These dryers are point-of-use dryers, sized for low capacities compared to other dryer types. Membrane dryers With Alumina Oxide Desiccant can be connected in parallel to increase the capacity beyond a single dryer.

Alumina Oxide Desiccantare used quite effectively in larger railway and bus applications and in larger vehicles, such as mobile service trucks, mining vehicles, firefighting trucks, and agricultural vehicles. Membrane dryers are also suitable for many stationary applications.