Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 214
constituents are ahnost entirelyremoved.^ These filters consist essentially of a series of layers of filter-clothsand fine grid-wire meshes, through which the feed-water is eitherdrawn or forced by the feed-pumps, and is thereby cleansed ofsuspended matter. The filtering material meantime becomes… … Fig. 214. The filter of course, removes solid matter only ; the impurities dis^-solved in the feed-water pass forward into the boiler unless removedin a feed-water heater or by chemical means. The efficiency andduration of a filter depend upon the nature of the filtering materialand upon the…
Steam-engines
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