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Heating Systems Valves, Air The Dole Valve Company Main office* and Factory: 1933 Carroll Avenue, Chicago 12, 111. THE ALL STAR LINE AIR AND VACUUM VALVES Selecting the right vent for a particular purpose is your assurance of the utmost efficiency and economy from one pipe steam heating systems. The Dole line covers every venting need and offers a complete choice for every purpose. Dole No. 1A Vari-Vent Air Valve Modern gas, oil or stoker fired one pipe steam sys tems require QUICK vent ing. This radiator valve lets air escape twice as fast as ordinary valves and balances the flow of steam at the first "breath" of boiler pressure. Adjust able vari-vent feature gets air out of those "far away" radiators as quickly as those close to the boiler. Dole No. 3 Air Valve Vents radiators of hand fired gravity steam heat ing systems. Double shell construction provides separate passages for air and condensation--extra large float defeats spitting or water leakage. Com plete venting assured' at pressures up to 10 lbs. Dole No. 2B Vari-Vent Vacuum Valve Adjustable radiator valve for " vacuumizing" and balancing gravity steam heating systems. Patented Dole bellows vacuum seal locks out air after it has been once expelled from the sys tem. Easily adjusted vari-vent feature assists in equalizing steam flow to all radiators. Dole No. 1933 Air Valve Low cost valve for venting . radiators of hand fired systems. Large float pro vides a seal against con densation to stop spitting. Dole No. IB Vari-Vent Air Valve Balances the flow of steam to convectors, either cast iron or copper, of automatical ly fired systems. Dole No. 1C Quick Vent Float Valve. Vents mains and speeds flow of steam to radiaators of automatically fired systems. Extra large venting port. Dole No. 5 Quick .Vent Float Valve Vents steam mains on hand fired systems. Positive seal against water. * Dole No. 4 Quick Vent Valve For quick venting mains that end 18 in. or more above the boiler water line. Dole No. 103 Vacuum Valve For venting convectors, ceiling radiators and pipe coils of "vacuumized" gravity steam systems. Dole No. 6B Vacuum Valve \ Vents the mains of "vacuumized" one pipe steam systems. Pre vents the return of air. Closes against water. Dole No. 14 Key Valve Low cost venting device for con cealed radiators and convectors of hot water heating systems. Protects panel fronts from rusty water stain. Write The Dole Valve Company for complete catalog and handy selector chart which indicates the Dole Air or Vacuum Valve most suited for a particular.need. 1234 Healing Systems va/. Jenkins Bros. BRONZE - IRON - STEEL VALVES Mechanical Rubber Goods SO White St., New York 13, N. Y.; 524 Atlantic St.. Boston 10. Mass.; 376 Spring St.. N.W., Atlanta 3. Ga.; 133 N. Seventh St.. Philadelphia 6. Pa.; 1514 Fulton St.. Chicago 7, III.; 510 Main St.. Bridgeport 9. Conn.; 660 Market St.. San Francisco 4. Cal. Jenkins Bros., Ltd.: Montreal; Factory, Lachine, Canada London. Eng. IN VALVES ** GIVES YOU EVERYTHING 1 I COYER EVERY HEATING AND AIR CONDITIONING NEED To adequately describe the complete Jenkins line of valves requires a Catalog of more than 400- pages, There are over 500 different types and patterns of valves that bear the trusted "Diamond" trade mark. Practically speaking, Jenkins can furnish any valve that you may require for plumbing, heating, air conditioning, general industrial or engineering service. General Classifications of Jenkins Valves Include--Bronze Valves fitted with Jenkins renewable composition disc. Bronze Regrind-Renew Valves with bevel and plug type seats. Bronze Gate Valves. Iron Body Valves fitted with Jenkins renewable composition disc. Iron Body Regrinding Valves. Iron Body Gate Valves with solid wedge and double disc parallel seats. All-Iron Valves. Air Furnace Malleable Iron Valves. Cast Steel Gate, Globe and Swing Check Valves. Electrically and Hydraulically Operated Valves. Radiator Valves. Fire Line Valves. Quick-opening and Self-closing Valves, Needle Valves, Y Valves, SolderEnd Valves, Stainless Steel Valves. Other Jenkins Products Are-- Composition Valves Discs exactly suited to service conditions. Friction Tape, Splicing Compound, Mechanical Rubber Goods. JENKINS VALVES ARE SOLD BY GOOD SUPPLY HOUSES EVERYWHERE Consult A-Z Listing of Thomas Register For the One Nearest You.* 1235