The FF-Series coalescing filters from Perma Pure are high efficiency particulate and coalescing filters designed for high temperature corrosive service. The filter includes a microfiber filter cartridge with fluorocarbon resin binder, with 99.99% removal efficiency of particles down to 0.01 micron in size. Used as a coalescer, this filter removes liquid droplets and particles down to 0.1 micron with an efficiency of 95% or greater. The thick, high-capacity borosilicate glass and Teflon filter element uniformly drains coalesced liquids to the bottom of the housing, where they are evacuated through the 1/8โณ NPT drain port. They are extremely effective at removing the acid mists and particulate in a CEMS system.
Coalescing filtration is achieved by forcing the gas stream through the filter element (see illustration). The flow path shown reflects a coalescing application. In this situation, small aerosol particles are forced together as they pass through the fine inner layer of the filter element. The larger drops created in this process fall out of the gas stream due to their mass. This natural separation is assisted by the coarse drain layer on the outside of the filter element. In a particulate application, this filter can be installed to reverse the flow path shown. The captured particulate then collects on the outside surface of the element, permitting visual determination of element condition.