Document 15yZpkorRMzK2RxeOvE3NBMea

Air Fillers Coppus Engineering Corporation 339 Park Avenue, Worcester, Mass. MANUFACTURERS OF AIR FILTERS, STEAM TUR BINES, FORCED DRAFT BLOWERS, COOLING FANS "COPPUS AIR FILTERS PASS CLEAN AIR" Coppus Unit Filter Coppus Unit Filter--The Coppus Unit Filter is of the dry type using a removable filter glove of all-wool felt and sup ported 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 (cleaning efficiency): 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 in. Weight per unit: 25 lb. Air Intake Side oj Stationary Onit Filter Outstanding Advantages 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. Cleaning Filter BlomenU with Portable Vacuum Cleaner 7. It combines scientific knowledge and practical engineering methods with highest quality of material and workmanship. Coppus Dry-Matic Filter takes place while the ventilating system is Automatic Self. Cleaning Dry- in operation. Built in capacities from 2000 cfm up. Type Air Filter Coppus Window Air Filter --It uses a spe cially woven cotton textile as filter medium arranged in the shape of an endless belt in zig zag fashion over rolls. The hori zontal pockets have a tapered shape, thus securing an even rate of air flow over the whole effective filter area. At pre determined 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, auto 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 least, 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 In ternal Combustion Engines. Steam Turbines, Horizontal and Vertical, 1 to 150 Hp. Forced Draft Blowers. matically reconditions the filter curtain. Portable and Cooling Ventilating. The cleaning and reconditioning operation Fans. Write for Complete Bulletin on Any Filter 886 Air Fillers Independent Air Filter Co. 215 West Ohio Street, Chicago Representatives In All Principal Cities DOUBLE-DUTY Self-cleaning Non-clogging Maintenance Free Three Section Group, 9 ft 3 in. high bp 9 ft 0 in. wide, capacity 30.000 cfm. "Double - Duty" filter* ore tank in capacities from 3,000 to 600,000 cfm. Designed for large installation require- ments, where automatic operation and unvarying air flow are important factors. The filtering principle is that of true impingement on viscous coated metal sur faces. Endless filter curtain composed of die stamped steel louvre plates, heavily indented and disposed in overlapping form. Acute deflections of individual fins, con stantly coated with heavy oil, result in high cleaning efficiency. Entirely self cleaning, regardless of dust content of air. Self-draining design of curtain plates eliminates danger of oil entrainment. Cross-section through filter. Sludge it removed at intervale of two to six months. Oil consump tion negligible--never changed; merely re plenished. For group systems, sectional frames are furnished as illustrated. Frames art fabricated in the form of a rigid vertical section of the required units in height. PERMO PAD Washable Waterproof Acidproof ,, ROM PAR Simple method of detaching unit from frame will be noted a6ow. Improved style locking device clamps felt teal firmly against main frame. For general air filtration pur poses. A highly resilient filter A Dry Fabric, Low Velocity Air Filter-- expanding tightly against its frame providing a perfect seal With Renewable Medium against air leakage. PERMO PAD is made entirely self-sup porting by an expanded metal grill incorporated in the rear side by a process that makes it an integral part of the unit. Frame size (overall dimensions) 20 x 20 x6in. Rated capacity per frame unit--800 cfm. Initial resistance (tandem arrangement) 0.18 W.G. For general ventilation and industrial air cleaning. Filtering principle that of straining air through fabric material at low velocity. Standard .filter medium high grade, fluffy cotton material with high cleaning efficiency and remarkable dust holding capacity. Each unit contains 27 sq ft of filter medium, which, at normal rating of 600 cfm results in a velocity of 22jfi fpm through medium. Initial resistance 0.15 in. W.G. Engineering Information Available on Request 887