Document 3NMY1nMnGK7eo66mKaGXoa6rn

The HOFFMAN FIRITE is the orig inal forced draft spreader type stoker ... Ibe pioneer of its kind ... A product of 25 years of con tinuous refinement. Engineered for long life and low maiotonanco. ' by the revolving impeOer j mechanism and delivered : to the furnace, accom-H plishing a uniform spread over the entire grate area\ by means of the unique' curvature of the im- . peller,blades. MANUAL ADJUST- M ENTS--Quick manual adjustments are pro COAL FEEDING UNITS vided to-roaintain uniform spread over wide fluclu-^ FIRITE coal feeder units are of the mechanical spreader type UBing the underthrow principle, and a ations in sizes and surface moisture conditions of the coal supply. / loose impeller mechanism consisting of a. main impeller shaft with large dust-sealed water-cooled bearings; equipped with four concentric shafts on Dumping Grates, either power or manually operated will fit any furnaoe width, due to the flexible design. which are suspended--in series--loose impeller blades which are held in operating position by centrifugal, force, and which provide ample clearance for tramp iron and other reasonably targe refuse which may be in the fuel supply. In laying out a .furnace.arrangement; first determine^ the proper width .of: grates and then' determine, . length by Increments of 15 ihcbes to obtain suitable t? projected area'for correct comburtionrates. m The impeller mechanism operates at low speed. All bearings are dust-eealed and of ample size. Interior wearing, surfaces are equipped with patented re placeable liners. The coal Hows by gravity from the hopper to a reciprocating coal feeder plate, which delivers the coal to an adjustable trey haviog a machined curved face, from which the cool is picked up HOFFMAN COMBUSTION HOME OFFICE: DETROIT 26, MICHIGAN BRANCH OFFICES OR AGENTS IN PRINCIPAL CITIES POWER DkiiH-' f Hoffman Firite Spreader Type Stokers equipped with Hoff man Continuous- Ash Discharge Grates, may be designed for ,- either front or rear discharge to' suit local plant conditions.- im Expansion and permanent growth of grate structures due to furnace temperatures are absorbed in expansion Joints, provided In the design. Any expansion In grate structure will notbo transmitted to the moving carriage, due to the. method of mounting., OraTo and fuel bed load isnot carrlodon - chain ond Sprockets. . ' Hoffmah C-A.D "gratot maybe Installed ,I6dlschargo at either front or rear. Unique air entry through the lower strand. . 1 Uniform air pressures under all parts of upper strand. 1 Positive air seals, both front and rear... that work. ' Effective air teals between grate bar sections. Minimum heat conductivity from fuel bed to carriage. Ready to Ship ENGINEERINC COMPANY lA/DDIf C A*, FAIRMONT, WEST VIRGINIA VVl/KIVd Ml. OEfRO|T< MICHIGAN SLOWER * Dc*fnber 1949