Document 3QD0XbLN63n8282Be6XKgwezD

Air Diffusers and Dampers Knowles Mushroom Ventilator Co. 41 North Moore Street, New York Knowles Air Diffusers for Auditoriums of Theatres, Churches, Schools ORIGINAL-----------RELIABLE----------- STANDARD Giving Satisfactory Service in Over 4,000 Installations PRODUCTS:--Cast-Iron and All-Steel Adjustable Mushroom Ventilators; Aisle Hood, Tu-Way and Camelback Air Deflectors; Round and Oblong Gallery Riser. Vents and Steel Grilles with adjustable volume damper attached --The Improved Mushroom Air Diffuser The newest Knowles product. An up-to-date mechanically correct .air unit of fixed height made of HEAVY steel, with strong supports bearing across 1-in. flange. Also furnished with CAST-IRON Dome Cap. Easy to regulate and install and low in price. Combines high efficiency with convenient adjustment affording finest control of air by simply turning screw on TOP of CAP. -Can be positively locked at desired adjust ment--is noiseless and made so that it cannot be taken apart before or after installation --an exclusive feature. Quick Anchorage to Wood or Concrete floors in one piece--Made in 6-in. and 8-in. diam. sizes--Same capacities as Nu-Notch type (see table below). 72uffJ2pfchKnowles Mushroom Ventilator or Air Diffuser The ideal cast-iron mushroom. Head has three outer bearings and is absolutely rigid. Ten recessed notches give close regulation of air. Locked into positive adjustment by tightening head screw. . Supplied with dome or flat tops. Three screw holes in floor flange for fastening to wood, dr three angle L lugs for setting in concrete, or three tapped holes in floor collar for fastening with set-screws to sleeve. Size ' 5* diem. 6* " V * 8* M 10* " Cu. Ft. per Min. at 300 ft. Vd. 42 60 81 105' 16S Area. Sq. Ft 0.1364 0.1964 0.2673 0.3491 0.5454 Weight Lbs. 3.50 4.25 5.75 8.00. 11.75 Specifications--Furnish and install where in dicated on drawings or as hereinafter specified (5-in.). (6-in.), (7-in.), (8-inJ, (10-in.). (Dome Top). (Flat Top). Nu-Notch Cast-Iron Mushroom Air Diffusers with recessed' notches for the per manent adjustment of mushroom caps at any desired opening together with center locking screw feature as manufactured by Knowles Mushroom Ventilator Co., New York, N. Y. JOisc'LooKnowles Gallery. Riser Ventilators are designed to insure better.control of air. Round holes in the gallery risers, do not weaken the construction but, on the contrary, with the cast-iron rings it is actually strengthened. The cast-iron grille is quickly inserted and locked by a simple twist motion--no bolts, screws or springs. Furnished with or without damper to fit same rings. Made in Four Sizes (See Booklet). Dampagrille--A Steel Grille, with adjustable volume damper attached. Ideal for many purposes--(made in various sizes.) Tu-Way Air Deflectors are designed to deliver maximum area with minimum fixed height. The air is discharged at both sides along the row of seats. Heavy Cast-Iron--Ornamental design--Adjustable double wing curved damper deflects air downward. Fine, posi tive adjustment--Rattleproof, noiseless. A DEVICE THAT DELIVERS THE FULL AREA OF FLOOR OPENING.. Floor opening 6j^ by SA inches--Area A Sq. Ft.--100 CFM at 300 Veh Standard Aisle Hood Air Deflectors are used to throw the fresh air out into the aisles in one direction. A curved damper reduces friction loss. Large size: 8 in. long, 6 in. wide, 6 in. high; Small size: 8 in. long, 4j/ in. wide, i'A in. high. Send for New Booklet of Complete Engineering Data or Samples 570 Air Filters and Cleaners Burt Air Filter Corporation 45 E. South Street, Akron, Ohio Representatives in Principal Cities automatic air filters UNIT AIR FILTERS Polystage Viscous Type --Constructed to give six stages of air filtration through a media of viscous coated screens which remove the dirt from the air and preci pitate it.in a tank of Ozonol at the base of the filter. Dirt is automatically sepa rated from the Ozonol by a special filter cup. The cleaned Ozonol is then automatically pumped back into the charg ing chamber of the filter just before the next cleaning operation. It is unnecessary to rotate the filter screens, except when the filter is being cleaned. Absolutely the only atten tion necessary is an occasional cleaning of filter cup and re Aulomalic Viscous Type Air Filter moval of sediment. A drain is provided at filter cup for attaching directly to sewer or, if desired, sediment can be drained into a sludge pan. Burt Automatic Viscous Type Air Filters are made in capaci ties from 2,500 c.f.m. upward. Dry Fibre Automatic-- The filter media employed in this filter is made from layers of specially-developed, wire- woven jute fibre and selected cheese cloth which are built Automatic Fibre Type Air Filler into an endless chain. The media is especially durable and is automatically cleaned by rotating filter pads over a series of vacuum nozzles which withdraw dirt and other particles which have been embedded in the filter media during the air cleaning operation. Velocity of air through filter media on the standard type is 286 f.p.m. at a resistance of .25 in. w.g. Can be furnished in sizes from 5,000 c.f.m. upMetallic Type Ceil with Frame ward. Metallic Type--An allmetal filter which uses Ozonol, a specially treated oil, as its adhesive agent. Cleaning of air is accomplished by im pingement of dust on the viscous coated surfaces of a series of screens having grad uated openings. Cells are standard size and are inter changeable, each having a capacity of 1,000 c.f.m. at a resistance of .2 in. w.g. Many new features, such as im proved handle design, special ly constructed crimped wire filter pads, etc., are described in the bulletin on this filter. Dry Fibre Type--The media employed in this filter is practically the same as that in the Dry Fibre Automatic. The cells are. 20" square and are built for unit installations. They are cleaned manually by use of a small industrial vacuum cleaner. Large per forations permit close contact between nozzle and filter pad and assure positive cleaning without need of removing pad from the frame. Other Burt Filters--Burt also manufactures a complete line of Metallic Compressor Filters, Metallic and Dry Unit Heater Filters, Furnace Filters and Special Filters designed to meet specific conditions. Right Angle Installation of Fibre Type Units 571