Cartridge filters come in a variety of lengths, diameters, and construction materials, which include woven, nonwoven, and membrane options. These filters have an outside-to-inside flow direction, making it essential for them to have a robust core to withstand higher pressure differentials during operation. Some manufacturers incorporate outer cages to enhance stability and capacity. Cartridges are placed inside pressure vessels, and guide rods make installation straightforward, allowing for both vertical and horizontal orientations. The seal between the cartridge and the vessel can take the form of single or double o-rings, tie rods, or other sealing designs.