FLEXIFIBER® Type BD (Brownian Diffusion)
The FLEXIFIBER Type BD element uses the Brownian Diffusion mechanism to achieve collection efficiencies of up to 99.95% or higher on all submicron liquid particles down to 0.1 microns. Operating pressure drops are normally designed in the range of 50 to 500 mm (2-20 in) W.G.

An interesting feature of the FLEXIFIBER Type BD mist eliminator is that, with submicron particles, the collection efficiency actually increases as the gas flow rate decreases through the bed. Increasing residence time in the fiberbed optimizes Brownian movement.

Type BD elements are normally cylindrical in shape, and are available in a wide variety of materials. The Type BD element packed with carbon fibers is recommended if your application contains flourides, a high PH, or is subjected to steam. This will significantly increase the life expectancy of the element.

How it works
Brownian Diffusion occurs with extremely small droplets that randomly move from side to side not directly following the path of the gas stream. Typically, the smaller the particle, the greater the Brownian movement.