A unit within a mechanical system that bellows in a bag form when air flows through, cleaning the air by collecting particles of foreign matter This system of filtering is rated the most efficient- in a range of 92 to 95 percent
a pressure filter where fabric bags are installed inside a cylindrical housing (pressure vessel) and the filtered liquid is pumped through the bag walls Liquid flow is from the inside to the outside of the bag - dirt is trapped inside the bag These pressure vessels must be ASME (American Society of Manufacturing Engineers) coded