Document LgzkaDNaVgJGopGYXVk612DBX

C. A. Dunham Co. Specialties, Heating 1 Trap No. 1 2 Trap No. t 3 Trap No. S No. 1. All Patterns Tapping J#'; Capacity 100 sq. ft. Rad. No. 2. All Patterns Tapping Capacity 350 sq. ft. Rad. No. 3. All Patterns Tapping 54"; Capacity 450 sq. ft. Rad. No. 4. Angle and Straightway Tapping \ Capacity 1500 sq. ft. Rad. No. 5* Angle and Straightway Tapping l"; Capacity 3000 sq. ft. Rad. DUNHAM BLAST TRAP 4 Trap No. 4 5 Trap No. B This trap is designed for draining blast heating coils. In selecting capacities, -be sure and reduce blast coil radiation to equivalent direct radiation by multiplying the actual surface of coil by a factor ranging from 6 to 10, depending on temperature, velocity and volume of air blown over coils. ; The operation of traps No. 6 and 7 is similar to that of the radiator trap, using the thermostatic principle, while Nos. 8, 16, 17, 18, 19 traps combine the Dunham thermostatic principle with the float. They handle large volumes of water successfully. Made only for pressures up to 10 lb. on vacuum or gravity systems. Size Pipe Connection. In. Capacity. Direct Radiation. Sq. Ft. No. 6 No. 7 No. 16 No. 17 No. 18 No. 19 1 11 3/4 t'A No, 8 2 Made in angle .and straightway patterns. 390 1,500 3,000 6,000 7,000 9,000 11,000 16,000 C. A. Dunham Co. Specialties, Heating Dunham Reducing Pressure Valve able in making old one-pipe heating sys Made only in standard weight for a pres sure range of 125 lb. down on high side, to 10 lb. and atmosphere on low side, in tems more efficient." It is easily and eco nomically installed, and insures the quick removal of air from the radiators. straight and expanded outlet patterns. The Dunham Home Heating System Dunham Vacuum Pump Governor Used on steam driven vacuum pumps to control vacuum in vacuum return lines. Made in all sizes from Yz to 2 in., inclusive. This is specially for the home or small building. It uses steam at very low pres sure. Steam is admitted into the radiator by the Dunham Packless Radiator Valve, where it is retained by the Dunham Radi Dunham Damper Control The Dunham Diaphragm Damper Regulator controls the steam pressure in ounces. It operates check and draft damper with chains. Dunham Air Eliminator Used in connection with the Dunham Home Heating System for venting the air from the system. Capacity for 2000 sq. ft. radiation. ator Trap until it has given off its heat, when, as water, it passes through' the trap together with the air, and back to the boiler through the return piping. The air is released by the Dunham Air Eliminator, and the water returns naturally to the boiler. The design is such that a partial vacuum can be obtained on receding fire, with water continuing boiling. Hot water pattern radiators with top inlet connec tions are required. The end of each steam . main is vented through a Dunham Trap Dunham Oil Separator Made in all sizes from 2% to 6 in. Flanged connections. into the return piping, and is dripped through wet or dry drip pipe directly back to the boiler return header. Dunham Strainer Has a large brass screen basket for catching and holding the dirt; easily ac cessible for cleaning and at once commends itself for this purpose. Made in all sizes from 54 to 6 in. Dunham Air Line Valve The principle of operation is identical, and design similar, to the Dunham Radi ator Trap. Its efficiency is high, and ser vice in connection with air line systems invaluable. Can be furnished with either 54 or 54-m. radiator connection. Air piping is required in connection with its use. It must not be subjected to steam pressures exceeding 10 lb. gage. The Dunham Return System This System differs from the Home Heating System in that it makes use of the Dunham Return Trap in place of the ' Dunham Air Eliminator, which introduces the added feature of a positive automatic return of water to the boiler when it is desired to raise the steam pressure. The feature of a positive return under varying steam pressures makes this Dun ham System particularly adaptable to apartment houses, small hotels and me dium size commercial buildings, schoolsand churches. This System makes possible the modernizing of old one-pipe and two-pipe gravity systems, and eliminates the sput tering, leaking air valves which are such trouble makers in these old heating jobs. Dunham Air Line System This is a one-pipe steam system using a Dunham Air Line Valve on each radi ator, with a system of air line piping which may discharge the air by gravity, or be attached to an air line Vacuum Pump. This system is particularly adapt The Dunham Vacuum System Simplicity is the key note of Dunham design. There is the system of steam mains and piping to supply all radiation, and the return piping to carry away the air and water of condensation by means of a vacuum pump. Steam may be sup plied direct from boiler, or through a Dun ham Reducing Valve, where boiler pres sure is too high for direct service. Or ex haust steam may be used, supplemented by live steam through a Reducing Valve. Bulletins Bulletins of standard architectural size with detailed information covering each System, and all products, including roughing-in dimensions, will be furnished on request.