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Boilers and Specialties American Radiator Company General,.Sales and Eastern Executive Office 40 West 40th Street, New York ' Western Executive Office and Accessories Division 816 South Michigan Avenue, Chicago, Illinois Manufacturers of Ideal Boilers, American Corto Radiators, and other Heating, Ventilating, and Refrigerating Products PACKLESS VALVE Arco Packless Hot Water Equalizing Arco Packless Valve No. 901 No. 999--leak- Combines three exclusive proof--does not require repacking. Does not stick or features: (1) Patented swinging plate, true elbow shape and non-sticking; (2) Arco Pack bind--opens with less stem always one smooth turn of special com position' handle turns easily and can never leak; ' (3) Equalizing feature permits No. 999 never gets hot. adjustment of Furnished in flow to individ No. 90t either round or lever handle--made in angle, corner and globe patterns for steam, water, vapor or ual radiator requirements after installa tion. Low in price. No. 901 Round Handle. No. 904 Lever Handle. vacuum. I PACKED VALVES Arco Fractional Control Type No. 994 Detroit Steam Valves Same as the No. 999 Pa ck1 ess with dial equipment and calibrat ing cone on disc. Metal well dis tributed--strong and heavy where strength is needed. Regularly equipped with composition handle, black hard " rubber finish. No. 72 Angle, No. 32 R. H. Corner, No. 72 No. 37 L. H. Corner, No. 57 Globe; No. 373 Gate. No. 845 Thermostat MERCOID CONTROLS Patents Pending All Mercoid- Controls employ the Mercoid Switch which carries the full line current at 110 or 220 volts without arcing or corrosion of con tacts. Mercoid instruments give automatic control of temperature, pressure or vacuum. The various models provide a wide field of ap plication. The No. 845 Mercoid Thermostat is especially adapted for use with Unit Heater--starting or stopping the fan as the air tem perature changes. The No. 847 Arco Motor Valve, for high or low pressure steam, water, air, etc., can be used with any Mercoid Control. Write for full details of this com plete line. 568 No. 848 Type For temperature, pressure, or vacuum American Radiator Company____________ Boilers and Specialties No. 1 In-Airid No. 8 In-Airid with Cup Removed IN-AIRID The Invisible Air Valve The In-Airid No. 1 is a new type automatic Air Valve especially designed for radiators as.now made for steam. Diverts steam to the bottom of the radiators com pletely eliminating all air. The In-Airid screws into the top plug opening'in the vent end of the radiator and its baffle disc completely blocks off the opening to the last section. The operation of In-Airid is based on the same well known principle of;the thermostati cally charged float used so successfully in the famous Airid No. 500. The In-Airid No. 2 is for `vacuum" jobs. It has all the venting features of the No. 1, plus the vacuum seal with hand-lapped monel disc and seat. It allows the air to escape but prevents its return into the system. AIRID AIR VALVES The Airid No. 500 should be installed only on old style radiation which" has nipple connections only at the bottom. For new type radiation with nipple connections at the top use the In-Airid. Vac-Airid No. 510 is for "vacuum" jobs on old style radiation. It is designed to allow the air to escape but prevents its return into the system. ARCO REGULATORS Arco Water Regulator No. 800 is for damper control on hot water heat ing boilers, adjustable for temperature f-between 100 deg. and 220 deg.--all metal--length of bulb, 2J4 in.; connec tion, 2 in. No. 801 Water Regulator for hot water supply heaters. No. 800 ARCO STEAM REGULATOR NO. 905 For damper control on steam boilers--pressure up to 15 lbs. Connection 1 inch I.P.S. male thread--all metal--trimmings furnished. No. 90S IDEAL QUICK VENTS FOR ALL TYPES OF MAIN VENTING No. 815, 54 in. No. 820, in. connection. Very senr sitive. For mains, long runs of pipe, indirect stacks, drop risers, etc. Ideal Float Quick Vent No. 821 closes against water. 54 in. male thread. Ideal Vac-Vent No. 822 for Vacuum heating. Self sealing against the return of air. 54 in. male thread. No. 891 No. 351 Arco Packless Water Gauge is a necessary accessory on vacuum jobs because it is impossible to keep an ordinary gauge vacuum-tight. A permanent improve ment for any below atmosphere heating plant. Fits any boiler. 569 No. ssi