Document zQ8DBnE1grad2NL0NVMbv1N7g

Insulation sound INDUSTRIAL ACOUSTICS COMPANY, INC. 341 Jackson Avenue New York 54, N.Y. SPECIALISTS IN NOISE AND PULSATION CONTROL Manufacturers of Engineered Acoustical Products for Industry STANDARDIZED PACKAGED SILENCING GUARANTEED PERFORMANCE AT LOW COST "Quiet-DUCT" Silencing Units "Quiet-FLOW" Silencing Units "Quiet-DUCT" Silencers are pre-fabricated in several hundred standard sizes and unlimited number of special "made to order" sizes. The Quiet-DUCT Silencers can be easily fitted into exist ing systems or in the design stage of new projects. They offer the following ad vantages : 1. "Quiet-DUCT" Silencers, measuring in length from 2 to 10 feet will provide as much noise control as conventional "lined" duct measuring from 30 to 200 feet long. The resulting economies both cost-wise and space-wise are obvious. "Quiet-FLOW" Silencers for control of cooling tower noise through the use of special acoustic panels (and adjustable Helmholtz Resonators when necessary) assure maximum attenuation of both low and high frequencies. 2. The attenuation data available for "Quiet-DUCT" Silencers has been deter mined by actual test thus eliminating any guess-work. 3. Pressure drop data are also the results of actual airflow measurements in our laboratory. "Quiet-VENT" Silencing Units "Quiet-VENT" Silencers prevent the passage of sound in either direction yet permit the circulation of air. Designed to fit snugly inside walls or to "hug the wall" in the economical "hang-on" type "Quiet-VENT" Silencers are available in depths of in., 5 in. and 7 in. and in widths of 30 in. and 42 in. to handle from 260 to 1710 cfm each. Used in offices, factories, apartments, homes, etc. Technical Data regarding all phases of Noise Control for Industry is available by writing to the Industrial Acoustics Company, Inc. 474 Lockport Mills, Inc Thermal and Acoustical INSULATION Dept C. Lockport, N. Y. Insulation Thermal Conductivity--The "k" valuH for cotton is 0.24 Btu/hr/sq ft/degrea F/inch. (See table.) , Light Weight--Weight of 1 leu ft is J4 lb. (See table.) ? Flame-Proofed--Withstands 1800F blow torch heat. Moisture-Resistant--Chemical treat ment, combined with natural protective coating on cotton fibres, enables cotton to effectively resist moisture. Prevents rot and mildew. Smooth Texture--No sharp particles to irritate the skin. Five featured types to meet every insu lation need: (1) OPEN BLANKET backed by tough, waterproof, asphalt-coated kraft paper to form an effective vapor Easy to Warehouse and Handle. Offers far more "compressibility." Requires one-third the trucking and warehouse space of ordinary insulation. barrier. (2) ENCLOSED BLANKET. Insulation completely enclosed in enve lope, asphalt-coated paper on one side, Simple and Economical to Install. Saves from 25 to 40 percent in costs. porous or "breather" type paper on Designed to Maintain Maximum Util other. (3) OPEN ALUMINUM FOIL. ity. Resists all types of deterioration. All the features of Open Type (1) plus the Won't sag or settle. Packaged in Rolls. extra value of aluminum foil backing. Effective vapor barrier . . . stops 90 per cent of radiant heat. (4) ENCLOSED INSULATING VALUE OF VARIOUS INSULATORS* ALUMINUM FOIL. Superior in insula tion plus values and thermal efficiency. The coefficients of conductivity (k value) are expressed in Btu per hour per square foot per degree Fahrenheit per 1 in. of thickness. (5) DOUBLE FOIL, aluminum foil on top and back, plus superior Lo-K Type of Insulation Wgt.per k*> Chi Ft Value 5 Blanket efficiency for tops in insulating value. Cotton: Insulating Batt................. .875 Rock Wool: Fibrous material made from rock....................................... 10.00 0.24 0.27 Mineral Wool: Fibrous material Lockport's TEMP-LO made from mineral slag.............. Glass Wool: Fibrous material made 0.27 A New Type of Semi-Rigid Insulation Improved processing makes possible a new and better semi-rigid blanket with greater thermal efficiency and ease of installation. It is light in weight, non irritating and made in all standard sizes, styles and backings. Distributing agencies now being estab lished. Write for details. from glass slag.............................. Rigid Insulation made from sugar cane fibre....................................... Chemically treated wood fibre between layers of paper.................. Eel grass between layers of paper.. BUtched and creped f*rpanHin^ fibrous blanket.......................... Shavings: Various from planer... Corkboard: No binder added....... Rigid insulation made from wood fibre...................... ........................ 1.50 13.50 3:62 3.40 1.50 8.80 7.00 15.90 0.27 0.33 0.25 0.25 0.27 0.41 0.27 0.33 * Compiled from Chapter 9, 1954 Edition. b "k" indicates temperature conductivity. 475