TOPCART multiple cartridge filters are heavy-duty standard filter housings designed for industrial liquid filtration. They are made of either stainless steel (SS 316) or special materials such as Hastelloy for 6 to 73 standard filter cartridges in 9 3/4Ó to 40Ó in length. These filters feature variety of different options including flat or spherical covers, clamp screws or swing-eye bolts, loose covers or davits (manual or hydraulic), side entry and central bottom outlet. The cover is sealed with an NBR-O-ring. FPM O-rings are available as an option. All filters are equipped with a cover vent and a drain in the bottom plate.