Document KG9pLYOXvw4EJvYm7GG4NB2qQ

Temperature Control National Regulator Co. 2311 Knox Avenue Chicago, Illinois Manufacturers and Contractors Complete Systems for Control of Temperature, Humidity, Ventilation and Air Conditioning. Metaphram Damper Regulators for Domestic Heating Boilers and Tank Heaters. A-Jacks High Pressure Steam Damper and Com bustion Control. A National Control System for temperature, hu midity, ventilation or air conditioning comprises coordinated equipment easily understood by local operating engineers. Each system is planned to meet the requirements of the individual building to assure proper regulation. National Thermostats.(Room Type)---Air operated; simple, two-temperature and compound types for direct radiation, direct radiation and unit ventilating ma-. chines, straight blast heating, ventilating fan units and dampers. : National Thermostats (Duct Type)--Air operated;, for ventilating duct or blast heating control and hot water tanks. ', National Thermostats (Industrial) for control of industrial and process temperatures. Metaphram Valves--Air operated; for direct radiation, steam lines, hot water tanks, humidifiers and accumulator control. : Metaphram Dampers--Air operated by Metaphram motors; for accurate automatic control of ventilation and blast heating. Built in round, double or louvre types, of black or galvanized steel or special metals. National Control Boards--Located in engineers room or central place for remote or zone control of pneumatic or electric-pneumatic switches in con nection with two-temperature and zone control systems _ under manual or time-clock operation; operating valves or steam lines, radiation, or ventilating fan units and dampers. \ National Air Compressors--Self-contained, auto matic units for unfailing operation of National ap paratus and equipment. Metaphram Damper Regulators for all domestic hot water or low pressure heating boilers, gas, oil or coal fired. A-Jacks Control for high pressure boilers (15 lb to 300 lb pressure) giving synchronized control to boiler pressure and fuel consumption. Catalogs and Bulletins--Thoroughly illustrated bulletins are available on all products. Engineering assistance will be rendered without obligation. 1052 Valves, Air The Dole Valve Company Main Office and Factory: 1901-1933 Carroll Avenue, Chicago, 111. Albant, N. Y. Atlanta, Ga. Baltimore, Md. Boston, Mass. Buffalo, N. Y. Butte, Mont. Cincinnati, Ohio Branch Offices and Representatives Cleveland, Ohio Dallas, Texas Denver, Colo. Detroit, Mich. Greensboro, N. C. Indianapolis, Ind. Los Angeles. Calif. Milwaukee. Wis. Minneapolis. Minn. Moline, III. New York, N. Y. Seattle, Wash. Oklahoma Citt. Okla. Spokane, Wash Philadelphia, Pa. Toronto. Ont., St. Louis, Mo. Canada Salt Lake Crrr, Wilkes-Barre, Pa. Utah Winnipeg, Man., San Francisco, Calif. Canada dole air valves and brass products A Complete line of thermostatic and hot water key air valves Patents have been applied for on all thermostatic type valves No. m No. 101 Dole Econ-OVac Valve: Straight Shank--54-in. I. P. T. Male,54-in. 'I.P.T. Female. Bellows operated vacuum seal. Quick venting. Chrome plated--popular price. No. 100 Dole Econ-OVac Valve--Bellows oper ated vacuum seal. Chrome plated--popular priced. No. 1933 Dole Air Valve: Angle Type-- Popularly priced. Attract ively modern in appearance. Bright nickel finish. No. 1933 Dole Air Valve: Straight Shank-- 34 - in. I.P.T. 34-in I.P.T. 54-in. I.P.T. Male, in. I.P.T. Female. Economical in cost. Quick venting. Bright nickel plating. No. 6B Dole Vacuum Valve: Straight Shank--54-in. I.P.T. Male, 54-in. I.P.T. Female. Our leading quick venting vacuum valve. Bellows oper ated vacuum seal. Extra quick venting. Chrome plated. No. 2B Dole Vacuum Valve--Our leading vacuum valve. Fool proof construc tion. Non-adjustable. Bel lows operated vacuum seal. Chrome plated. No. 3A Dole Quick Vent Air Valve: Straight Shank-->4-in. I.P.T. No. 3B Dole Quick' Vent Air Valve: Straight Shank--M-in. I.P.T. No. 3C Dole Quick Vent: Straight Shank-- 54-in. I.P.T. Male, %-in. I.P.T. Female. No. OB No. 100 No. 1. Dole Syphon Air Valves--Our leading sy phon air valves. Sturdy con struction. Modern de sign. Vents freely. Chrome plated. Our leading quick vent valves. Extra large venting ports. Chrome plated. Reasonable prices. The Dole Hot Water Key Air Valve (No. 10)--These valves (not illustrated) are packed two dozen in a box. Four keys included in each box. No. 19SS--Angle No. 1333--Straight Shank No. SC Write for Prices and Discounts 1053