Specifications     Type FWK2-A2 FWK3-A2 FWK4-A2     Inlet / outlet (N1/N2) Bushing Rp 2" (BSP) I flange DN50 PN16     Vent (N3) Bushing Rp 1/4" (BSP)     Drain (N4) External thread R3/4" (BSP)     Housing material Stainless steel 1.4301 (304)     Material internals Stainless steel 1.4301 (304)     Housing gasket FPM (other materials optional)     Max. operat. pressure 10 bar     Max. operat. temperature -10/+80°C     Confirmation DGRL 2014/68/EU I Art.4, §3 (PED)     Cartridge support DOE as well as Code 8 (222-adaptor)     Cartridge quantity selective 5 or 7     Cartridge length 20" 30" 40"     Overview brochure PDF-DOWNLOAD Suitable filter elements: Depth filter up to 90% retention rate .       . Depth filter up to 99,9% retention rate .   . Membrane filter cartridges .       . Aktivated carbon / adsorption filter cartridges .     . Stainless steel filter cartridges .     . Original-Filter cartridges from 3M .       Brief description: The filter housing type FWK-A2 are cheap welded stainless steel constructions to install 5 or 7 double open end filter cartridges. Alternatively filter cartridges with 222-adaptor (Code 8) can be used. They consist of a cylindrical vessel with welded boiler dished head. The casted lid is hinged and sealed by an O-ring and closed by eye-bolts. The inlet (N1) is located sidewise to the shell, the outlet (N2) on the opposite side above the lower boiler dished head. The filter cartridge of the type DOE tight on cutting edge with spring adaptor, the adapter 222-cartridge on a double O-ring. The filter cartridges are passed through from the outside to the inside. The housings are equipped with welded bottom lugs.