Vane Mist Eliminators Chevron Packs are Vane-Type Separators of High-Speed Droplets. When they are properly designed they can be very effective in collecting droplets of < 10 microns in diameter. Generally, they are used for the collection of droplets greater than 20 microns.Chevron is a solution as it contains solid fluid with a special design that allows gas to pass vertically or horizontally between the blades. The variation of spaces between the baled allows a high -volume production capacity with low pressure drop.