Document 3JReBYEkaLKgrR1kMk8QK1xEa

/ ' Heating Systems Specialities Yarnall-Waring Company Manufacturers of Steam Specialties 133 Mermaid Ave., Philadelphia 18, Pa. YARWAY IMPULSE Construction--Made entirely of bar stock. Only one moving part, valve (F). For pressures to 400 lb, body, control cyl inder, valve and seat are stainless steel; valve and seat heat-treated; bonnet is cold rolled steel, cadmium plated; cap is tobin bronze. For 600 lb, trap is all stain less steel. Operation--At-low condensate tempera tures, bypass through control chamber (K) and center orifice of valve reduces chamber pressure and valve opens. At high temperature, condensate vaporizes in (K), increased volume builds up pres sure and valve closes. Light Weight--Need no support--J in. trap weighs only If lb. 2 in. weighs 8| lb. Small Size--\ in. trap 2J in. long--2 in. trap, 4$ in. long. Will not air bind.--Require no priming. Insure quick heating. Low Price--Often cheaper than repairing old traps. Factory set for all pressures to 400 lb (or 600 lb) without change of valve or seat. 750,000 sold. Stocked by 200 distributors. Send for descriptive Bulletin T-1740. YARWAY FINE-SCREEN STRAINERS Offer better protection against rust, scale and dirt for all steam equipment. Ten standard sizes M in. to 3 in. Cad mium plated bodies. High grade Monel woven-wire screens. Many thousands in use. Also flanged strainers, in. to 5 in. Write for Bulletin S-203. List Prices, Weights and Dimensions No. GO Serie^-to 400 lb; 120 Series to GOO lb - Size Complete Trap Series 60 Complete Trap Series 120 Weight Pounds Length Inches w $15 < 25 IK 2K Y<" 22 37 2 z V 31 52 2M 3H IK' 48 80 4 ZH 68 114 SK 4M V 80 150 SH 4J4 YARWAY EXPANSION JOINTS All-steel welded construction; light but strong. Chromium covered sliding sleeves. Cylinder guide and stuffing box integral, assuring perfect alignment. In ternal limit stops. Gun-pakt and Glandpakt types; Gun-pakt (illustrated) has fixed glands fitted with screw guns which permit addition of plastic packing while- joint is under pressure. Sizes. 2 in. to 24 in., single end or double end, flanged or welding ends; 150, 300 and 400 lb pressures. Choice of leading .utilities and industrial firms. Send for,. Bulle tin EJ-1912. 1442 Heating Systems vabes. Air The Dole Valve Company Main Offices and Factory: 1933 CaiTOll Avenue, Chicago 12, EL WATER MIXERS /Oo THE ALL STAR LINE THERMOSTATIC AIR CONTROL AIR AND VACUUM VALVES `DOLE THERMOSTATIC AIR CONTROL" FOR FORCED WARM AIR HEATING SYSTEMS PROVIDES INDIVIDUAL ROOM TEMPERATURE CONTROL 1. Operates thermostatically from room air temperature. 2. Extremely Sensitive: Modulates output to meet heat requirements.- 3. Completely self-contained; no wires to run--no bulbs to locate--simple to install. Replaces standard forced warm air registers. 4. Simple setting of the thermo-dial assures room temperature as desired-- corrects many unsatisfactory heating in stallations. Materially improves any forced warm air system. An automatic balancer. 5. A fully automatic zone control for every room. Dole Air Controls are avail able in two sizes and will fit the following stackhead openings: 10' will fit--10' x 4', 10' x 5', 10" x 6'. 12" will fit--12" X 4", 12" X 5', 12".x 6". With an adapter 12" will fit--14' x 4', 14" x 5', 14' x 6". An adapter is available for baseboard installation of these Controls. DOLE AIR AND VACUUM VALVES Dote No. to Fully Automatic Hot Water Air Valve The Dole line covers every venting need on one pipe steam and hot water heating systems and offers a complete choice for every purpose. I DOLE WATER MIXERS \ Dole Water Mixers provide safer, tem pered domestic hot water on all tankless heater and storage tank installations. Available in 3 sizes, lA in., % in., and ! in. Date No. 1A Vari-Vent Atr Valve 1443