Document 6bQQk1Z2yowapB68b3vmkyq7R

Air System Equipment Air Filters end Cleaners Detroit Lubricator Company Division of American Radiator & j^tasdard ^anitarg corporation Chicago 5. III., 816 S. Michigan Avenue Detroit 8, Michigan, U. S. A. New York 18, N. Y., 40 West 40th Street --- Canadian Representative: Los Angeles 13, Calif./320 Crocker Street Railway and Engineering Specialties Limited, Montreal, Toronto, Winnipeg "DETROIT" AIR FILTERS Detroit Air Filters are of the replace ment type. Highly efficient and very low initial resistance. The entire depth of filter is used in cleaning the air--large dust carrying capacity. The pollen removal characteristics of Detroit Air Filters make them extremely effective in treatment of hay fever. Tests indicate efficiency of 99 per cent when used in tandem; over 95 per cent for single filters. OPERATION CONSTRUCTION The Detroit Air Filter is constructed of fiber board and is completely reinforced to make a rigid, non-sagging unit. In the No. 1 Filter the cellular passages formed by the fiber board are the same size on both the inlet and outlet sides of the filter. In No. 2 and No. 25 Filters passages on the inlet side are larger than the passages on the outlet side. These passages are so arranged that they make a 90 deg angle. Dust laden air entering the filter changes direction 45 deg causing a scrubbing action along the sides of the first cellular passages; then changes direction 90 deg again scrub bing along the sides of the smaller cellular passages. As dust impinges on the sides of the passages, oil is absorbed by capillary at traction into each dust particle, and that dust particle then becomes the medium for catching other dust particles which, in turn, absorb oil and become the hew dust catching medium, and so on, until the filter becomes completely dust-laden. COATING The absorbent coating or dust catching medium is a special odorless compound that remains tacky at minus 10 F. and will not drip at temperatures as high as 180 F. It does not contain any substance that will become rancid. This special compound is sprayed on the fiber board before as sembling, at a temperature that insures thorough penetration. Because of the porous nature of the fiber board the Detroit Air Filter holds many more times the weight of adhesive substance than filters made of non-porous materials. TYPES No. 1. Inlet % in. corrugations. Outlet % in. corrugations.' No. 2. For high efficiency applications and pollen removal. Inlet % in. corrugations. Outlet % in. corrugations. For ventilating systems or for furnace and air conditioning in stallations where a portion of air handled is outside air. Usually installed in tandem in ventilating systems. No. 25. Inlet H in. corrugations. Outlet % in. corrugations. For installations where larger part of air handled is recirculated air. When ordering specify type number and size. Type No. 2 Filter 2 in. thick furnished on all orders unless otherwise specified. STANDARD SIZES NOMINAL SIZES Available with 2-pass % in^ I -pass ^io.ar Nos. 1, 2 and 25.......... Wide 16' 16' 20* 20' 15' i(r 10* High 2QT 25' 20* 25' 20* 20' 10* Thick | Wide ? 16' Ir ,5' r I ,6' NOMINAL SIZES High 20* 20* 25' 23' Thick 1' 1' 1' 1' Wide 20* 20* 10* icr High 20' 25' 20* i(r Thick 1' 1' 1' Ir The above nominal sizes allow sufficient clearance for easy replacement. Detroit Air Filters can be made in any size and any thickness to meet requirements. Prices supplied upon application. 902 Air System Equipment Air Filters and Dehydrators Research Products Corporation Madison, Wisconsin RESEARCH AIR FILTERS FOR HEATING AND AIR CONDITIONING SILICA GEL MOISTURE ABSORBING MATERIAL U. a Patent 2070073 U. S. Patent 2294478 RESEARCH Air Filters With RiP-CLEAN Features No. "200" Series-- When this Re-Fil-Able filter becomes dirt filled, the wire grids are unhooked, the filter pad replaced. Pads fit snugly, sealing against air leaks. (Can be Rip-Cleaned). No. "tOO*' Series Exclusive Rip-Clean Feature--When the filter becomes clogged you need only rip off two top layers of filter pad to remove the surface dirt and lint. This may be repeated 5 times--extending the useful life^of the filter at high efficiency. Research Filter Banks--Research Air Filters are used extensively in filter banks both flat and V designs. Write for technical data sheets to determine type and size of bank for any installation. Research Washable Filter--This filter is used where a wash able filter is specified and also above kitchen ranges to trap grease particles. Wash with hot wateror steam. No. "100" Series No. "100" Series--A fiber framed filter is designed so the entire unit is easily replaced by a new one. Offers high dust removing efficiency throughout its long life--adaptable to heating, ventilating and air conditioning systems. (Can be RipCleaned). A Research Air Filter 20 x 20 x 2 in., when tested according to the test code of the American Society of Heating and Ventilating Engineers has an efficiency of 91 per cent, tested with 80-20 dust. The dust holding capacity with standard code dust is 150 grams per sq ft of filter area, the restriction at this dust load being .2 in. of water. Research Silica-Gel--For maintaining dry conditions in storage rooms; ideal for drying refrigerants. 903