Document O38gNgrGVwLBR0a25bvDLJ1DM

Air Filters and Cleaners - Goppus Engineering Corporation 339 Park Avenue, Worcester, Mass. MANUFACTURERS OF AIR FILTERS, STEAM TUR BINES, FORCED DRAFT BLOWERS, COOLING FANS Coppus Unit Filter Coppus Unit Filter--The Coppus Unit Filter is of the dry type using a removable filter glove made of all-wool felt or a specially woven cotton textile and supported by a rigid, welded distender frame which is adjustable so that after assembly the filter glove may be stretched and held tautly inside of the filter casing, giving the pockets a tapered shape so essential for an even air flow. All metallic parts are rust-proofed (Bonderized, Cadmium Plated), and Duco painted. Specifications Normal Rating: 800 cfm. Resistance when clean: .2 in. W.G. Dust Arrestance (cleaningefficiency): 99.61 per cent (Tested in accordance with A.S.H.V.E. Standard Code for Testing and Rating Air Cleaning Devices Used in General Ventilation Work). Dimensions: 20 in. by 20 in. by 6)^ in. ' Weight per unit: 25 lbs. Air Inlake Side of Stationary Unit Filter Outstanding Advantages Cleaning Filler Ele ment* with Portable Vacuum Cleaner 1. It has an exceptionally high dust arrestance. 2. It maintains a high dust arrestance even under diverse conditions of neglect. 3. Its operation is not impaired by atmospheric conditions. 4. It is a Medium Air Resistance Type (Class C) according to the A.S.H.V.E. Code for Air Cleaning Devices. 5. It is easily and quickly cleaned without removing the filter element. 6. Its cost of upkeep is very low because the permanent filter element is reconditioned periodically with a vacuum cleaner. 7. It combines scientific knowledge and practical engineering methods with highest quality of material and workmanship. Automatic, Self-Cleaning Air Filter Automatic SelfCleaning Air Filter--It uses the same specially woven cotton tex tile as filter medium arranged in the shape of an endless belt in zigzag fash ion over rolls. The horizontal pockets have a tapered shape, thus securing an even rate of air flow over the whole effective filter area. At predetermined intervals the filter curtain is automatically moved by a small geared motor over the rolls, thus passing over a suction nozzle. For certain types of dust the filter is also equipped with a beater which, at predetermined intervals, automatically reconditions the `filter cur tain. The cleaning and reconditioning operation takes place while the ventilating system is in operation. Built in capacities from 2000 cfm up. Coppus Window Air Filter It supplies a continuous flow of filtered air, is extremely quiet in operation, keeps out street noises, eliminates dirt and dust including invisible particles, and last, but not feast, is very effective against rag weed pollen in concentrations commonly found in the hay fever season. Its use is recommended for offices, homes and hospitals. . Air Filters for Compressors and Internal Combustion Engines. Steam Turbines, Horizontal and Verti cal, I to 100 Hp. Forced DrafuBlowers. Portable and Cooling Ventilating Fans. '770 Air Fillers Independent Air Filter Co. 215 West Ohio Street, Chicago Representatives in all principal cities Three Section Croup, 9 ft. 3 in. high by 9 ft. 0 in. wide, capacity $0,000 c.f.m. "Double Duly" flier* are made in capacities from 3r<00 to 600.000 c.f.m. "DOUBLE DUTY" An Air Cleaner That Cleans Itself--and Never Clogs This type especially adapted for large installations, where auto matic operation and unvarying air flow are important factors. The filtering principle is that of true impingement on viscous coated metal surfaces. Endless filter curtain composed of die stamped steel plates, heavily indented, and disposed in overlapping form. Acute deflections of individual fins, constantly coated with heavy oil, result in high cleaning ef~ ficency. Entirely self-cleaning, regardless of dust content of air. Self-draining design of curtain plates eliminates all danger of oil entrainment. Typical "KOMPAK" Group Ao/c easy method o) detaching unit from frame. Supporting frame work shipped completely assembled Tuidtj for direct attachment to sheet metal dud "KOMPAK" A Low Velocity, Dry Fabric Air Filter--With Renewable Medium For general ventilation and in dustrial air cleaning. Successfully used in large and small instal lations. Filtering principle that of straining air through fabric material at low velocity. Any degree of efficiency desired can be obtained by selecting fabric best Cross-section through filter. Sludge is removed at intervals of two to six months. Oil consumption negli gible--never changed; merely re plenished suited for individual requirements. Standard filter medium, known as "Filterdown" is high grade, fluffy cotton material, with high cleaning efficiency and remarkable dust holding capacity. Other, material, obtainable in open market, can be used. Filter units made rust proof by heavy cadmium plating. Each unit contains 27 square feet of filter medium, which at normal rating of 600 c.f.m., results in velocity of 22% f.p.m. through material. Initial resistance 0.15 inch w.g. MtTiJou of Servicing Entire operation--unloading, re filling and replacinp--consume* ai most 3 minutes per unit. Useful life of filter medium varies from three to six months, depending on conditions ZIG ZAG FIBRE PAK An all purpose fabric airfilterfor installations ofthe smaller capacities. High in cleaning ef ficiency, low in initial cost and low in cost of refills. Made in two standard sizes, SO in. x SO in. and 16 in. x S5 in. Both rated at 800 c.f.m. each A popular priced filter of the "throwawaytype. Filler filling is oil treated vegetable fibre--a tough, springy, ribbon like material. Frame provides for expansion gap between front and rear units. This type available in unit form for warm air' heating systems and air conditioning equipment 771