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C. A. Dunham Company Heating Systems Steam Systems Specialties DUNHAM TYPE OTS HEATING ELEMENT An extended sur face heating ele ment made entirely of steel. Construc tion and design entirely different than in the ordinary radiator--long and narrow, suitable for many installations where standard type radiators are not desirable. Light in weight, unusual heating capacity. Each element is made up of IK in. steel pipe, with No. 22 gage heavy fins, mechanically attached, eliminating the use of a solder bond without sacrifice of heat transfer. The fin design is unique. Each fin, when pressed on the pipe, interlocks with the preceding fin--an exceedingly tight and permanent mechanical joint. This construction assures greater contact area between fin and tube than is obtained with commonly used methods--greater heating capacity. The complete unit is painted with heat-resisting zinc chromate black enamel. Covers for OTS elements are available for all lengths of units. Constructed of No. 16 gage metal and extends the entire fin length of the unit. Covers reduce the rated capacity of the unit by approximately 3 per cent. OTS elements are manufactured in standard lengths from 18 in. to 72 in. as given in table. Lengths up to 12 ft can be supplied by coupling two standard lengths together with pipe couplings or by welding. Standard units are threaded at each end with standard pipe threads. Units for welding can be supplied on special order with chamfered ends. Element Number OTS-418 OTS-424 OTS-436 OTS-448 OTS-460 OTS-472 **L" Length Inches 18 24 36 48 60 72 I Lb Steam--65 Deg Entering Air Btu Rated EDR 1880 2525 3815 5105 6395 7685 7.8 10.5 15.9 21.3 26.7 32.0 Approx. Net Weight. Pounds Less Cover 11.0 14.9 22.6 34.4 38.2 46JO With Cover 12.0 16.9 25.6 34.4 43.2 52.0 . ; - ----------------------7 ----'-------------- . * ~ than given in above table, apply proper conversion factor. vapauvy a v LUiiuiUUII PU1CI DUNHAM TYPE OTS CONVECTOR This Convector is an adaptation of the OTS heating element to a deluxe enclosure. Particularly suit able for installation on shipboard or other applications where appearance is a major factor. The unit casing is constructed of _______________ No. 18 gage metal with punched-in Unit Number COTS-418 COTS-424 COTS-436 COTS-448 COTS-460 COTS-472 Capacity Table "L" Length Inches 1 Lb Steam--65 F Entering Air Approx. Net Weight Btu Rated EDR Pounds 18 1995 83 19.8 24 2680 11.3 26.7 36 4050 16.8 40.8 48 5420 223 54.8 60 6790- 283 68.9 72 8160 34.0 82.9 grille in the sloping top. Casings are painted with gray paint chromate primer for protec tion. Capacities are based on Standard conditions of 1 lb steam, 65 F entering air. For capacities at other than standard conditions, apply proper conversion factor. This unit is available in lengths from 18 in. to 72 in. OTHER DUNHAM SPECIALTIES Float and Thermostatic Traps 8 sizes, 800 sq ft to 20,000 sq ft. Closed Float Traps 8 sizes, 800 sq ft to 20,000 sq ft. High Pressure Traps (Inverted Bucket) K in. and % in. sizes, up to 150 lb. Return Traps 5 sizes, 1500 sq ft to 13,000 sq ft. Pressure Reducing Valves Single seated (Type 340) % in. to 3 in. Double seated (Type 300) IK in. to 10 in. Standard Flanged. Strainers K in. to 2 in. 1050 Heating Systems steam William S. Haines & Company 12th and Buttonwood Sts., Philadelphia, Pa. Manufacturers of EQUIPMENT FOR VAPOR AND VACUUM HEATING SYSTEMS PRODUCTS--Haines Vento Radiator Traps, Medium Pressure and Blast Type Traps, Combined Float and Thermostatic Traps, Air Eliminators, High Pressure Thermostatic Traps, Boiler Return Traps, Radiator Valves. HAINES F & T TRAPS Designed to handle large quantities of con densation. For driv ing steam mains, unit heaters, hot water gene rators. etc. Cannot become air bound as it has. a thermostatically controlled air by pass. Sizes K in-, 1 in., 1K in.. HAINES MEDIUM PRESSURE TRAPS A ruggedly constructed bolted case trap. Ideal for hospital and kitchen equipment and all pro cess work operating on pressure up to 60 pounds. HAINES RADIATOR TRAPS The thermostatic ele ment in all Haines Traps is a Bourdon tube, charged with a volatile fluid and her metically sealed. The expansion and contraction of the fluid, under varying tem peratures, fur nishes the op erating power. The vertical seat of this trap prevents it from becoming inoperative from scale or other foreign matter. HAINES HIGH PRESSURE TRAPS For drip ping high pressure mains, laundry equip ment and all process fixtures with working pressures up to 125 pounds. HAINES MODULATING VALVES A packless valve assuring positive and leak proof performance. Completely opens or closes on less than a full turn of han dle. Can be furnished with wheel or lever handle or lock-' shield. HAINES BOILER RETURN TRAPS For vapor and atmospheric heating systems. Assures positive circulation by venting the air and returning the water of con densation to the boiler. Has no stuffing boxes or packed joints to leak air or water. Each device is individually tested, factory adjusted and guaranteed. 1051