Document 15QYey0qG2886aGRRKy1z7Od5

Air Conditioning * Industrial Heating; Direct-Fired Heaters Dravo Corporation Machinery Division Dravo Building, Fifth & Liberty Avenues, Pittsburgh 22, Penna. Atlanta, Baltimore, Boston, Chicago, Cincinnati, Cleveland, Detroit, Houston, Indianapolis, New Yobs, Philadei.phia, Pittsburgh, San Francisco, St. Louis Sales Representatives in Principal Cities DRAVO Counfafir SPACE HEATERS 250,000 to 2,000,000Btu/hr output Dravo Counlerjlo Space Heaters, in addi tion to comfort heating, are easily adapted to heat curing and process dry ing, tempering of replacement air, as duct furnaces, and for summertime ventilation. Dravo Counterflo Space Heaters can also be tied in with existing air conditioning systems. PYROJET BURNER--Built exclu sively by Dravo and available only on Dravo Counterflo Heaters, the induced draft Pyrojet Burner burns gas, light oil, heavy oil or combination gas/light oil. With the latter, instant change over is affected by a manually or automatically controlled switch which even adjusts the air/fuel mixture. For firing heavy No. 5 oil, a dual pre heating system is employed. EASY INSTALLATION--The airfoil design of the combustion chamber per mits maximum flow of air over its sur face with minimum resistance. Inside, the flame travels the length , of the chamber, sweeping up and back to the exhaust port over the burner; the gases then travel through a series of cor rosion-resistant aluminized steel econ omizer tubes, the secondary combus tion chamber. STAINLESS STEEL COMBUSTION CHAMBER--Rugged mill-type con struction . . . top quality engineering. Exhaust whirl-cooled through two sets of economizer tubes. SAFETY - TESTED -- Approved by A.G.A. and listed by Underwriter's Laboratories, Inc. Dravo Safety Con trol Circuit is accepted by Factory Mutual Engineering Division and Factory Insurants Association. Wiring meets J.I.C. requirements. 10-YEAR GUARANTEE--All stand ard model Counterflo Heaters carry a fully bonded 10-year guarantee on all parts in direct contact with flame or flue gases. COUNTERFLO Model Output CFM at No. Btu/hr 70F 25 250,000 3140 35 350,000 4380 50 500,000 6250 75 750,000 9400 100 1,000,000 12,500 125 1,250,000 15,650 150 1,500,000 18,750 175 1,750,000 21,900 200 2,000,000 25,000 Stand. Temp. Rise Fan Mtr. hp 74 H 74 m 74 vi 74 3 74 5 74 5 74 Vi 74 Vi 74 10 Dis Approx. charge Shpg. Outlets Wt. 2 1275 2 1375 3 1475 4 2000 5 2300 3 2900 4 3000 5 3400 6 3500 Dimensions L 3'2* 3'2" 5'0" 6'10" 8'2' 8'2" 8'7M" 10'0' 10'0' W 2'2" 2'8" 2'8' 3'4" 3'4' 4'5" 4'5" 4'5' 4'5' H 7'8' 8'7* 8'5' 8'4* 8'4' 11'8' n'8' 12'2* 12'2* Dravo Ccrp, Air Conditioning Industrial Heating; Direct-Fired Heaters DRAVO \pawfb SPACE HEATERS 200,000 to 250,000 Btu/hr output POWER AND FUEL--Heater operates on 120 volt 80 cycle single-phase current. 440/220 volt three-phase operation can be supplied if desired. Unit can be equipped with a self-contained gun-type oil or gas burner depending upon the fuel avail able. FAST TRANSFER OF HEAT--Stain less steel combustion chamber allows faster heat transfer from fuel to air and guarantees longer heater life and sus tained efficiency. Equipped with UL approved gun-type oil burner or A.G.A. approved gas burner. FLOATING COMBUSTION CHAM BER--Supporting straps hold stainless steel chamber in place for inverted or horizontal mounting. One end floats freely relieving stresses and strains due to normal expansion of chamber. HEAT ANYDIRECTION--Warms areas up to 3600 sq ft. Directional nozzle can be rotated 360 deg heating any desired location, high velocity discharge assures good distribution up to 90 ft from the unit without the use of ductwork. This Dravo Heater is ideal for garages, service stations, construction offices, recreation centers, agriculture buildings, warehouses, stores, offices and show- rooms. The heater fan can be used for summer ventilation. Heaters can be adapted to air conditioning systems. Htr. No. Output Btu/hr 20 200,000 25 250,000 CFM at 70F 2200 2700 PARAFLO Temp. Rise 84 / 84 Efficiency Fan Mtr. hp 80% 80% M Approx. Nozzles Shpg. Wt. 2 785 2 795 Dimensions LW H 4'2'f 2'5' 7'10* 4'2* 2'5* 7*10' DRAVO Gat- SUSPENDED TYPE UNIT HEATERS 40,000 to 184,000 Btu/hr output COMPLETE RANGE OF SIZES-- Heaters are available in a wide range of capacities in various model sizes with outputs from 40,000 to 184,000 Btu/hr. FLEXIBILITY of gas fuels-- Heaters can operate on manufactured, mixed, natural, or LP gases. LOW COST HEATING--These heatCrS nre ?deal fr economically heating unit areas in commercial or indus trial buildings such as garages, stores, machine shops, warehouses, amusement centers and other similar type buildings. 89