The Facet VF-21SB & VF-22SB are versatile, compact, economical, light weight housings for superior in-line filtration protection. These housings utilize the same elements as previous Series 21 & 22 housings, but offer the benefit of a quick open swing bolt type close along with a new optional mounting bracket for installation.Depending on the type of cartridge selected, the housing may be used as a filter, absorptive filter, filter separator or air/gas entrainment separator to remove solids, water, mist, or hydrocarbon carryover.